{"id":1575,"date":"2024-10-31T12:36:28","date_gmt":"2024-10-31T11:36:28","guid":{"rendered":"http:\/\/www.charente2050.fr\/?page_id=1575"},"modified":"2026-04-13T16:53:51","modified_gmt":"2026-04-13T14:53:51","slug":"indicateur-6-evolution-passee-des-niveaux-des-nappes","status":"publish","type":"page","link":"https:\/\/www.charente2050.fr\/?page_id=1575","title":{"rendered":"Indicateur 6 : \u00c9volution pass\u00e9e des niveaux des nappes"},"content":{"rendered":"\n<p class=\"has-text-color has-larger-font-size\" style=\"color:#0071a1\"><strong>D\u00e9finition<\/strong> <\/p>\n\n\n\n<p class=\"has-black-color has-text-color\">Les <strong>nappes souterraines<\/strong> sont une composante essentielle du cycle de l&rsquo;eau. Leur niveau<strong> d\u00e9pend des infiltrations, elles-m\u00eames influenc\u00e9es par les pr\u00e9cipitations<\/strong>. La recharge des nappes par infiltration se fait plus ou moins rapidement selon la quantit\u00e9 de pluie \u00e0 un moment donn\u00e9. Ces <strong>niveaux peuvent \u00eatre fortement affect\u00e9s par le climat<\/strong>, et le changement climatique a donc un impact direct sur leur variation.<\/p>\n\n\n\n<p class=\"has-black-color has-text-color\">L&rsquo;analyse des indicateurs des niveaux de nappes permet de <strong>suivre l&rsquo;impact des changements climatiques pass\u00e9s sur un bassin et de rep\u00e9rer les zones les plus sensibles gr\u00e2ce \u00e0 une mise \u00e0 jour r\u00e9guli\u00e8re des donn\u00e9es<\/strong>.<\/p>\n\n\n\n<p class=\"has-black-color has-text-color\"><\/p>\n\n\n\n<p class=\"has-black-color has-text-color\">Certains sous-indicateurs correspondent \u00e0 ceux utilis\u00e9s par  : <\/p>\n\n\n\n<ul class=\"is-style-default has-black-color has-text-color\"><li><em><a href=\"https:\/\/www.drias-climat.fr\/\"><strong>DRIAS<\/strong>, les futurs du climat<\/a><\/em><\/li><\/ul>\n\n\n\n<section id=\"2eb131\" class=\"wp-block-gutentor-m13 section-2eb131 gutentor-module gutentor-module-table-of-contents g-enable-collapsible\"><div class=\"grid-container\"><div class=\"g-toc\"><div class=\"g-toc-header g-collapsible-active\"><div class=\"g-toc-heading g-icon-right\"><div class=\"g-toc-title\"><strong>Sous-indicateurs<\/strong><\/div><span class=\"g-toc-icon-wrap\"><i class=\"g-toc-icon g-toc-icon-open fas fa-plus\"><\/i><i class=\"g-toc-icon g-toc-icon-close fas fa-minus\"><\/i><\/span><\/div><\/div><div class=\"g-toc-body\"><ul class=\"g-unordered-list\" type=\"1\"><li><a href=\"#1-\">1. \u00c9volution des niveaux moyens des nappes <\/a><ul class=\"child-list\"><li><a href=\"#2-\">1.1. Niveaux moyens annuels des nappes<\/a><\/li><li><a href=\"#3--moyennes-saisonni%C3%A8res-\">1.2. Niveaux moyens saisonniers des nappes<\/a><\/li><\/ul><\/li><li><a href=\"#6-2--%C3%A9volution-des-temp%C3%A9ratures-maximales-\">2. \u00c9volution des niveaux extr\u00eames des nappes<\/a><ul class=\"child-list\"><li><a href=\"#7--21-%C3%A9vapotranspiration-cumul%C3%A9e-saisonni%C3%A8re--\">2.1. Niveaux mensuels maximaux des nappes<\/a><\/li><li><a href=\"#9--22-%C3%A9vapotranspiration-cumul%C3%A9e-saisonni%C3%A8re--\">2.2. Niveaux mensuels minimaux des nappes<\/a><\/li><\/ul><\/li><li><a href=\"#23-3-respect-des-d%C3%A9bits-seuils\">3. Indice Pi\u00e9zom\u00e9trique Standardis\u00e9 (IPS)<\/a><\/li><li><a href=\"#23-3-respect-des-d%C3%A9bits-seuils\">4. P\u00e9riode de recharge et de vidange des nappes<\/a><\/li><\/ul><\/div><\/div><\/div><\/section>\n\n\n\n<p><\/p>\n\n\n\n<h2 id=\"1-\"><span style=\"color:#0071a1\" class=\"tadv-color\"><strong>1. \u00c9volution des niveaux moyens des nappes <\/strong><\/span><\/h2>\n\n\n\n<p class=\"has-black-color has-text-color\">Les <strong>niveaux pi\u00e9zom\u00e9triques<\/strong> repr\u00e9sentent la hauteur des nappes phr\u00e9atiques, exprim\u00e9e en <strong>m\u00e8tres NGF* (m NGF) en moyenne journali\u00e8re<\/strong>. Sur la plateforme ADES, g\u00e9r\u00e9e par le BRGM, les donn\u00e9es pi\u00e9zom\u00e9triques des stations en continu sont disponibles depuis la cr\u00e9ation des stations jusqu\u2019\u00e0 aujourd\u2019hui.<\/p>\n\n\n\n<p>*Le m\u00e8tre NGF permet d\u2019indiquer l\u2019altitude d\u2019un endroit en France en le comparant au niveau de la mer, qui sert de point de r\u00e9f\u00e9rence.<\/p>\n\n\n\n<p class=\"has-black-color has-text-color\">L\u2019objectif est de d\u00e9terminer <strong>l\u2019\u00e9volution interannuelle des niveaux des nappes<\/strong>, ainsi que leur \u00e9volution sur les p\u00e9riodes annuelles et saisonni\u00e8res, afin de suivre l\u2019impact du changement climatique. <\/p>\n\n\n\n<p class=\"has-black-color has-text-color\">Les saisons sont d\u00e9finies par des p\u00e9riodes de 3 mois :<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li><strong>Hiver<\/strong> : d\u00e9cembre de l&rsquo;ann\u00e9e n-1, janvier et f\u00e9vrier.<\/li><li><strong>Printemps<\/strong> : mars, avril et mai.<\/li><li><strong>\u00c9t\u00e9<\/strong> : juin, juillet et ao\u00fbt.<\/li><li><strong>Automne<\/strong> : septembre, octobre et novembre.<\/li><\/ul>\n\n\n\n<p class=\"has-black-color has-text-color\">Une p\u00e9riode de r\u00e9f\u00e9rence de 30 ans <strong>(1991 &#8211; 2020)<\/strong>, d\u00e9finissant un climat de r\u00e9f\u00e9rence, est compar\u00e9e aux moyennes annuelles et saisonni\u00e8res pour \u00e9valuer l&rsquo;\u00e9volution de ces indicateurs et leur relation avec le changement climatique.<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li>Si l&rsquo;\u00e9cart par rapport \u00e0 la normale est positif, cela signifie que le niveau moyen de la nappe est plus \u00e9lev\u00e9 que la normale.<\/li><li>Si l&rsquo;\u00e9cart est n\u00e9gatif, cela indique que le niveau moyen de la nappe est plus bas que la normale.<\/li><\/ul>\n\n\n\n<p><strong>*<\/strong>Certaines tendances d&rsquo;\u00e9volution sont statistiquement non significatives et sont pr\u00e9sent\u00e9es \u00e0 titre indicatif&nbsp;<\/p>\n\n\n\n<h3 class=\"has-text-color\" id=\"2-\" style=\"color:#0071a1\"><strong>1.1. Niveaux moyens annuels des nappes<\/strong><\/h3>\n\n\n\n<p class=\"has-black-color has-text-color\">La carte ci-dessous pr\u00e9sente les tendances des <strong>niveaux pi\u00e9zom\u00e9triques moyens annuels<\/strong>, calcul\u00e9es pour chacune des stations et interpol\u00e9es \u00e0 l&rsquo;\u00e9chelle du bassin de la Charente. Elle indique les <strong>tendances en pourcentage par an<\/strong>.<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li>Les nappes du Cr\u00e9tac\u00e9 tendent \u00e0 \u00e9voluer entre + 0,1 % \u00e0 -0,5 % par an.<\/li><li>Les nappes datant du Jurassique montrent des variations allant de &#8211; 0,1 % \u00e0 + 0,2 % par an, pouvant augmenter ou diminuer.<\/li><li>Les nappes du socle sont stables.<\/li><\/ul>\n\n\n\n<p class=\"has-black-color has-text-color\"><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" width=\"1024\" height=\"724\" src=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/Annee2024-1024x724.png\" alt=\"\" class=\"wp-image-4387\" srcset=\"https:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/Annee2024-1024x724.png 1024w, https:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/Annee2024-300x212.png 300w, https:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/Annee2024-768x543.png 768w, https:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/Annee2024-1536x1087.png 1536w, https:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/Annee2024.png 1753w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-black-color has-text-color\"><strong><em>Exemple du pi\u00e9zom\u00e8tre de St Fraign<\/em>e<\/strong><\/p>\n\n\n\n<p class=\"has-black-color has-text-color\">L&rsquo;exemple du pi\u00e9zom\u00e8tre de Saint-Fraigne illustre l&rsquo;\u00e9volution des niveaux moyens annuels. Cette station collecte des donn\u00e9es sur les niveaux pi\u00e9zom\u00e9triques depuis 1993, permettant d&rsquo;\u00e9tablir une \u00e9volution pour la p\u00e9riode de 1993 \u00e0 2024, avec une <strong>diminution de -0,01 % par an.<\/strong><\/p>\n\n\n\n<ul class=\"is-style-default has-black-color has-text-color\"><li>Cela repr\u00e9sente une diminution totale de <strong>-0,3 % en 31 ans<\/strong>.<\/li><\/ul>\n\n\n\n<p class=\"has-black-color has-text-color\">Par rapport \u00e0 la normale climatique 1991-2020 (77,99 m NGF)  :<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li>On observe que le niveau pi\u00e9zom\u00e9trique annuel a diminu\u00e9 depuis 1993.<\/li><li>La moyenne glissante sur 10 ans montre que le niveau \u00e9volue de mani\u00e8re cyclique au fil des ans.<\/li><\/ul>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img src=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/FRAIGNE.png\" alt=\"\"\/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<section id=\"96ca3f\" class=\"section-96ca3f gutentor-module gutentor-module-accordion\"><div class=\"grid-container\">\n<div id=\"85e628\" class=\"wp-block-gutentor-m6-item section-85e628 gutentor-module gutentor-module-accordion-item\"><div class=\"gutentor-module-accordion-panel g-a-panel-96ca3f\"><div class=\"gm-ah-96ca3f gutentor-module-accordion-item-heading gutentor-module-icon-position-right\"><span class=\"gutentor-module-accordion-panel-handler\" role=\"button\"><span class=\"gutentor-module-accordion-panel-handler-label\">Autres stations pi\u00e9zom\u00e9triques<\/span><span class=\"gutentor-module-accordion-icon\"><i class=\"gm-aio-96ca3f gutentor-module-accordion-icon-open fas fa-plus\"><\/i><i class=\"gm-aic-96ca3f gutentor-module-accordion-icon-close fas fa-minus\"><\/i><\/span><\/span><\/div><div class=\"gm-ab-96ca3f gutentor-module-accordion-body\">\n<div id=\"section-g1b3b36\" class=\"wp-block-gutentor-e0 section-g1b3b36 gutentor-element gutentor-element-advanced-text\"><div class=\"gutentor-text-wrap\"><p class=\"gutentor-text\">Les graphiques des tendances d&rsquo;\u00e9volution des niveaux pi\u00e9zom\u00e9triques moyens annuelles des autres stations sont disponibles via les liens suivants:<\/p><\/div><\/div>\n\n\n\n<section id=\"gmd773eeb\" class=\"wp-block-gutentor-m4 section-gmd773eeb gutentor-module gutentor-advanced-columns\"><div class=\"grid-container\"><div class=\"grid-row\">\n<div id=\"col-gmecd715\" class=\"wp-block-gutentor-m4-col col-gmecd715 gutentor-single-column  grid-lg-6 grid-md-12 grid-12\"><div id=\"section-gmecd715\" class=\"section-gmecd715 gutentor-col-wrap\">\n<p class=\"has-black-color has-text-color\">Alluvions de l&rsquo;\u00eele d&rsquo;Ol\u00e9ron<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/TERDOUX.png\">Terdoux<\/a><\/li><\/ul>\n\n\n\n<p class=\"has-black-color has-text-color\">Aquif\u00e8res du Cr\u00e9tac\u00e9<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/AGNANT.png\">Agnant<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BAIGNES.png\">Baignes<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BIRON.png\">Biron<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/CESAIRE.png\">Cesaire<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/DIGNAC.png\">Dignac<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/JUILLAGU.png\">Juillagu<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LACLISSE.png\">La Clisse<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/POMMIERS.png\">Pommiers<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/POUSSARD.png\">Poussard<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/ROUFFIAC.png\">Rouffiac<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/SALIGNAC.png\">Salignac<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/TORSAC.png\">Torsac<\/a><\/li><\/ul>\n\n\n\n<p class=\"has-black-color has-text-color\">Aquif\u00e8res du Jurassique<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/AGRIS.png\">Agris<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/AIGRE.png\">Aigre<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/ALLOUE.png\">Alloue<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/AMANT.png\">Amant<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BALLANS.png\">Ballans<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BELLEVUE-VARAIGNES-24.png\">Bellevue<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BELLICOU.png\">Bellicou<\/a><\/li><\/ul>\n<\/div><\/div>\n\n\n\n<div id=\"col-gmbe5216\" class=\"wp-block-gutentor-m4-col col-gmbe5216 gutentor-single-column  grid-lg-6 grid-md-12 grid-12\"><div id=\"section-gmbe5216\" class=\"section-gmbe5216 gutentor-col-wrap\">\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BOIS.png\">Bois<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/CHAZELLE.png\">Chazelle<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/ENSIGNE.png\">Ensigne<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/FRAIGNE.png\">Fraigne<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/JUILLERS.png\">Juillers<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LA-PARENTIE-CHAMPNIERS-ET-REILHAC-24.png\">La Parentie<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LA-ROCHEFOUCAULD.png\">La Rochefoucauld<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LIMALONG.png\">Limalong<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LONGRE.png\">Longre<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LORIGNE1.png\">Lorigine1<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LUNESSE.png\">Lunesse<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/MORNAC.png\">Mornac<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/MOUTON.png\">Mouton<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/OUTRES1.png\">Outres1<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/OUTRES2.png\">Outres2<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/PAIZAY.png\">Paizay<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/POIMIER.png\">Poimier<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/REORTE.png\">Reorte<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/SALLESVI.png\">SallesVI<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/SAUZE.png\">Sauze<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/STPROJET.png\">Stprojet<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/VILLENOU.png\">Villenou<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/VILLIERS.png\">Villiers<\/a><\/li><\/ul>\n\n\n\n<p class=\"has-black-color has-text-color\">Aquif\u00e8res de socle<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2024\/10\/LA-PARENTIE-CHAMPNIERS-ET-REILHAC-24-6.png\">La Parentie<\/a><\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/section>\n<\/div><\/div><\/div>\n<\/div><\/section>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"has-text-color\" id=\"3--moyennes-saisonni%C3%A8res-\" style=\"color:#0071a1\"><strong>1.2. Niveaux moyens saisonniers des nappes<\/strong><\/h3>\n\n\n\n<p class=\"has-black-color has-text-color\">La carte ci-dessous pr\u00e9sente les tendances des <strong>niveaux pi\u00e9zom\u00e9triques moyens saisonniers<\/strong>, calcul\u00e9es pour chacune des stations et interpol\u00e9es \u00e0 l&rsquo;\u00e9chelle du bassin de la Charente. Elle indique les <strong>\u00e9volutions en pourcentage par an<\/strong>.<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li><strong>Pour toutes les saisons, les niveaux tendent \u00e0 varier<\/strong>, avec des fluctuations allant de -0,8 % \u00e0 +0,7 % par an selon les saisons.<\/li><\/ul>\n\n\n\n<p class=\"has-black-color has-text-color\"><\/p>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" src=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/Saisons2024-724x1024.png\" alt=\"\" class=\"wp-image-4434\" width=\"960\" height=\"1358\" srcset=\"https:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/Saisons2024-724x1024.png 724w, https:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/Saisons2024-212x300.png 212w, https:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/Saisons2024-768x1086.png 768w, https:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/Saisons2024-1086x1536.png 1086w, https:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/Saisons2024-1448x2048.png 1448w\" sizes=\"(max-width: 960px) 100vw, 960px\" \/><\/figure>\n\n\n\n<p class=\"has-black-color has-text-color\"> <\/p>\n\n\n\n<p class=\"has-black-color has-text-color\"><strong><em>Exemple du pi\u00e9zom\u00e8tre de Fraigne<\/em><\/strong><\/p>\n\n\n\n<p class=\"has-black-color has-text-color\">Les niveaux moyens saisonniers ont \u00e9volu\u00e9, sur une p\u00e9riode de 33 ans (de 1991 \u00e0 2024), de la mani\u00e8re suivante :<\/p>\n\n\n\n<ul class=\"is-style-default has-black-color has-text-color\"><li><strong>Diminution de &#8211; 0,6 % en <\/strong>hiver,<\/li><li><strong>Diminution de &#8211; 0,3 % au printemps<\/strong>,<\/li><li><strong>Augmentation de + 0,3 % en \u00e9t\u00e9<\/strong>,<\/li><li><strong>Diminution de &#8211; 0,3 % en automne<\/strong>.<\/li><\/ul>\n\n\n\n<p><span style=\"color:#000000\" class=\"tadv-color\">En hiver, les niveaux ont tendance \u00e0 diminuer par rapport \u00e0 la normale, avec des variations d&rsquo;une ann\u00e9e \u00e0 l&rsquo;autre. Depuis 2000, le printemps et l&rsquo;automne montrent \u00e9galement une tendance \u00e0 la baisse. En \u00e9t\u00e9, les niveaux pi\u00e9zom\u00e9triques augmentent, suivant un cycle pluriannuel avec des p\u00e9riodes au-dessus et en dessous de la normale.<\/span><\/p>\n\n\n\n<p class=\"has-black-color has-text-color\">L&rsquo;indicateur d&rsquo;\u00e9volution des niveaux moyens saisonniers des nappes montre donc une diminution en hiver, au printemps et en automne, tandis que les niveaux augmentent en \u00e9t\u00e9.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img src=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/FRAIGNE-2.png\" alt=\"\"\/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<section id=\"8b9eb7\" class=\"section-8b9eb7 gutentor-module gutentor-module-accordion\"><div class=\"grid-container\">\n<div id=\"7dc37b\" class=\"wp-block-gutentor-m6-item section-7dc37b gutentor-module gutentor-module-accordion-item\"><div class=\"gutentor-module-accordion-panel g-a-panel-8b9eb7\"><div class=\"gm-ah-8b9eb7 gutentor-module-accordion-item-heading gutentor-module-icon-position-right\"><span class=\"gutentor-module-accordion-panel-handler\" role=\"button\"><span class=\"gutentor-module-accordion-panel-handler-label\">Autres stations pi\u00e9zom\u00e9triques<\/span><span class=\"gutentor-module-accordion-icon\"><i class=\"gm-aio-8b9eb7 gutentor-module-accordion-icon-open fas fa-plus\"><\/i><i class=\"gm-aic-8b9eb7 gutentor-module-accordion-icon-close fas fa-minus\"><\/i><\/span><\/span><\/div><div class=\"gm-ab-8b9eb7 gutentor-module-accordion-body\">\n<div id=\"section-g5b181d\" class=\"wp-block-gutentor-e0 section-g5b181d gutentor-element gutentor-element-advanced-text\"><div class=\"gutentor-text-wrap\"><p class=\"gutentor-text\">Les graphiques des tendances d&rsquo;\u00e9volution des niveaux de nappes moyens saisonniers des autres stations sont disponibles via les liens suivants:<\/p><\/div><\/div>\n\n\n\n<section id=\"gmfb4ed04\" class=\"wp-block-gutentor-m4 section-gmfb4ed04 gutentor-module gutentor-advanced-columns\"><div class=\"grid-container\"><div class=\"grid-row\">\n<div id=\"col-gm1c6b4d\" class=\"wp-block-gutentor-m4-col col-gm1c6b4d gutentor-single-column  grid-lg-6 grid-md-12 grid-12\"><div id=\"section-gm1c6b4d\" class=\"section-gm1c6b4d gutentor-col-wrap\">\n<p class=\"has-black-color has-text-color\">Alluvions de l&rsquo;\u00eele d&rsquo;Ol\u00e9ron<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/TERDOUX-2.png\">Terdoux<\/a><\/li><\/ul>\n\n\n\n<p class=\"has-black-color has-text-color\">Aquif\u00e8res du Cr\u00e9tac\u00e9<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/AGNANT-2.png\">Agnant<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BAIGNES-2.png\">Baignes<\/a><\/li><li><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BIRON-2.png\">Biron<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/CESAIRE-2.png\">Cesaire<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/DIGNAC-2.png\">Dignac<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2024\/10\/JUILLAGU-7.png\">Juill<\/a><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/JUILLAGU-2.png\">a<\/a><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2024\/10\/JUILLAGU-7.png\">gu<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LACLISSE-2.png\">La Clisse<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/POMMIERS-2.png\">Pommiers<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/POUSSARD-2.png\">Poussard<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/ROUFFIAC-2.png\">Rouffiac<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/SALIGNAC-2.png\">Salignac<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/TORSAC-2.png\">Torsac<\/a><\/li><\/ul>\n\n\n\n<p class=\"has-black-color has-text-color\">Aquif\u00e8res du Jurassique<\/p>\n\n\n\n<ul><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/AGRIS-2.png\">Agris<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/AIGRE-2.png\">Aigre<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/ALLOUE-2.png\">Alloue<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/AMANT-2.png\">Amant<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BALLANS-2.png\">Ballans<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BELLEVUE-VARAIGNES-24-2.png\">Bellevue<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BELLICOU-2.png\">Bellicou<\/a><\/li><\/ul>\n<\/div><\/div>\n\n\n\n<div id=\"col-gm0f383f\" class=\"wp-block-gutentor-m4-col col-gm0f383f gutentor-single-column  grid-lg-6 grid-md-12 grid-12\"><div id=\"section-gm0f383f\" class=\"section-gm0f383f gutentor-col-wrap\">\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BOIS-2.png\">Bois<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/CHAZELLE-2.png\">Chazelle<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/ENSIGNE-2.png\">Ensigne<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/FRAIGNE-2.png\">Fraigne<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/JUILLERS-2.png\">Juillers<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LA-ROCHEFOUCAULD-2.png\">La Rochefoucauld<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2024\/10\/LIMALONG-7.png\">Limalong<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LONGRE-2.png\">Longre<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LORIGNE1-2.png\">Lorigine1<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LUNESSE-2.png\">Lunesse<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/MORNAC-2.png\">Mornac<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/MOUTON-2.png\">Mouton<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/OUTRES1-2.png\">Outres1<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/OUTRES2-2.png\">Outres2<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/PAIZAY-2.png\">Paizay<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/POIMIER-2.png\">Poimier<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/REORTE-2.png\">Reorte<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/SALLESVI-2.png\">SallesVI<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/SAUZE-2.png\">Sauze<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/STPROJET-2.png\">Stprojet<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/VILLENOU-2.png\">Villenou<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/VILLIERS-2.png\">Villiers<\/a><\/li><\/ul>\n\n\n\n<p class=\"has-black-color has-text-color\">Aquif\u00e8re de socle<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LA-PARENTIE-CHAMPNIERS-ET-REILHAC-24-2.png\">La Parentie<\/a><\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/section>\n<\/div><\/div><\/div>\n<\/div><\/section>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"has-text-color\" id=\"6-2--%C3%A9volution-des-temp%C3%A9ratures-maximales-\" style=\"color:#0071a1\"><strong>2. \u00c9volution des niveaux extr\u00eames des nappes<\/strong><\/h2>\n\n\n\n<h3 class=\"has-text-color\" id=\"7--21-%C3%A9vapotranspiration-cumul%C3%A9e-saisonni%C3%A8re--\" style=\"color:#0071a1\"><strong>2.1. Niveaux mensuels maximaux des nappes<\/strong><\/h3>\n\n\n\n<p><span style=\"color:#000000\" class=\"tadv-color\">Les <strong>niveaux mensuels maximaux<\/strong> sont calcul\u00e9s en prenant la moyenne mensuelle des niveaux pi\u00e9zom\u00e9triques bas\u00e9es sur les niveaux moyens journaliers, puis en s\u00e9lectionnant la valeur maximale de l&rsquo;ann\u00e9e.<\/span><\/p>\n\n\n\n<p><strong>*<\/strong>Certaines tendances d&rsquo;\u00e9volution sont statistiquement non significatives et sont pr\u00e9sent\u00e9es \u00e0 titre indicatif&nbsp;<\/p>\n\n\n\n<p class=\"has-black-color has-text-color\"><strong><em>Exemple du pi\u00e9zom\u00e8tre St Fraigne<\/em><\/strong> <\/p>\n\n\n\n<p class=\"has-black-color has-text-color\">Cet exemple illustre l&rsquo;\u00e9volution de cet indicateur :<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li> La moyenne glissante ne permet pas d&rsquo;\u00e9tablir une tendance d&rsquo;\u00e9volution pour les niveaux pi\u00e9zom\u00e9triques mensuels maximaux, tout comme la tendance observ\u00e9e entre 1991 et 2024.<\/li><\/ul>\n\n\n\n<p class=\"has-black-color has-text-color\"><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img src=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/FRAIGNE-3.png\" alt=\"\"\/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<section id=\"df7430\" class=\"section-df7430 gutentor-module gutentor-module-accordion\"><div class=\"grid-container\">\n<div id=\"a2b62c\" class=\"wp-block-gutentor-m6-item section-a2b62c gutentor-module gutentor-module-accordion-item\"><div class=\"gutentor-module-accordion-panel g-a-panel-df7430\"><div class=\"gm-ah-df7430 gutentor-module-accordion-item-heading gutentor-module-icon-position-right\"><span class=\"gutentor-module-accordion-panel-handler\" role=\"button\"><span class=\"gutentor-module-accordion-panel-handler-label\">Autres stations pi\u00e9zom\u00e9triques<\/span><span class=\"gutentor-module-accordion-icon\"><i class=\"gm-aio-df7430 gutentor-module-accordion-icon-open fas fa-plus\"><\/i><i class=\"gm-aic-df7430 gutentor-module-accordion-icon-close fas fa-minus\"><\/i><\/span><\/span><\/div><div class=\"gm-ab-df7430 gutentor-module-accordion-body\">\n<div id=\"section-gf4f752\" class=\"wp-block-gutentor-e0 section-gf4f752 gutentor-element gutentor-element-advanced-text\"><div class=\"gutentor-text-wrap\"><p class=\"gutentor-text\">Les graphiques des tendances d&rsquo;\u00e9volution des niveaux pi\u00e9zom\u00e9triques mensuels maximaux par an des autres stations sont disponibles via les liens suivants:<\/p><\/div><\/div>\n\n\n\n<section id=\"gm015c9ca\" class=\"wp-block-gutentor-m4 section-gm015c9ca gutentor-module gutentor-advanced-columns\"><div class=\"grid-container\"><div class=\"grid-row\">\n<div id=\"col-gm3762cc\" class=\"wp-block-gutentor-m4-col col-gm3762cc gutentor-single-column  grid-lg-6 grid-md-12 grid-12\"><div id=\"section-gm3762cc\" class=\"section-gm3762cc gutentor-col-wrap\">\n<p class=\"has-black-color has-text-color\">Alluvions Ile d&rsquo;Ol\u00e9ron<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/TERDOUX-3.png\">Terdoux<\/a><\/li><\/ul>\n\n\n\n<p>Aquif\u00e8res du Cr\u00e9tac\u00e9<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/AGNANT-3.png\">Agnant<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BAIGNES-3.png\">Baignes<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BIRON-3.png\">Biron<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/CESAIRE-3.png\">Cesaire<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/DIGNAC-3.png\">Dignac<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/JUILLAGU-3.png\">Juillagu<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LACLISSE-3.png\">La Clisse<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2024\/10\/POMMIERS-8.png\">Pommiers<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/POUSSARD-3.png\">Poussard<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/ROUFFIAC-3.png\">Rouffiac<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/SALIGNAC-3.png\">Salignac<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/TORSAC-3.png\">Torsac<\/a><\/li><\/ul>\n\n\n\n<p class=\"has-black-color has-text-color\">Aquif\u00e8res du Jurassique<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/AGRIS-3.png\">Agris<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/AIGRE-3.png\">Aigre<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/ALLOUE-3.png\">Alloue<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/AMANT-3.png\">Amant<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BALLANS-3.png\">Ballans<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2024\/10\/BELLEVUE-VARAIGNES-24-8.png\">Bellev<\/a><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BELLEVUE-VARAIGNES-24-3.png\">u<\/a><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2024\/10\/BELLEVUE-VARAIGNES-24-8.png\">e<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BELLICOU-3.png\">Bellicou<\/a><\/li><\/ul>\n\n\n\n<p><\/p>\n<\/div><\/div>\n\n\n\n<div id=\"col-gm0464e4\" class=\"wp-block-gutentor-m4-col col-gm0464e4 gutentor-single-column  grid-lg-6 grid-md-12 grid-12\"><div id=\"section-gm0464e4\" class=\"section-gm0464e4 gutentor-col-wrap\">\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BOIS-3.png\">Bois<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/CHAZELLE-3.png\">Chazelle<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/ENSIGNE-3.png\">Ensigne<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/FRAIGNE-3.png\">Fraigne<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/JUILLERS-3.png\">Juillers<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LA-ROCHEFOUCAULD-3.png\">La Rochefoucauld<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LIMALONG-3.png\">Limalong<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LONGRE-3.png\">Longre<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LORIGNE1-3.png\">Lorigne1<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LUNESSE-3.png\">Lunesse<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/MORNAC-3.png\">Mornac<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/MOUTON-3.png\">Mouton<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/OUTRES1-3.png\">Outres1<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/OUTRES2-3.png\">Outres2<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/PAIZAY-3.png\">Paizay<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/POIMIER-3.png\">Poimier<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/REORTE-3.png\">Reorte<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/SALLESVI-3.png\">SallesVI<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/SAUZE-3.png\">Sauze<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/STPROJET-3.png\">Stprojet<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/VILLENOU-3.png\">Villenou<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/VILLIERS-3.png\">Villiers<\/a><\/li><\/ul>\n\n\n\n<p class=\"has-black-color has-text-color\">Aquif\u00e8res de socle<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LA-PARENTIE-CHAMPNIERS-ET-REILHAC-24-3.png\">La Parentie<\/a><\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/section>\n<\/div><\/div><\/div>\n<\/div><\/section>\n\n\n\n<p><\/p>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"has-text-color\" id=\"9--22-%C3%A9vapotranspiration-cumul%C3%A9e-saisonni%C3%A8re--\" style=\"color:#0071a1\"><strong>2.2. Niveaux mensuels minimaux des nappes<\/strong><\/h3>\n\n\n\n<p class=\"has-black-color has-text-color\">Les <strong>niveaux mensuels minimaux<\/strong> sont calcul\u00e9s en prenant la moyenne mensuelle des nappes, bas\u00e9e sur les niveaux moyens journaliers, puis en s\u00e9lectionnant la valeur minimale de l&rsquo;ann\u00e9e.<\/p>\n\n\n\n<p><strong>*<\/strong>Certaines tendances d&rsquo;\u00e9volution sont statistiquement non significatives et sont pr\u00e9sent\u00e9es \u00e0 titre indicatif&nbsp;<\/p>\n\n\n\n<p class=\"has-black-color has-text-color\"><strong><em>Exemple du pi\u00e9zom\u00e8tre St Fraigne<\/em><\/strong> <\/p>\n\n\n\n<p class=\"has-black-color has-text-color\">Cet exemple illustre l&rsquo;\u00e9volution de cet indicateur :<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li>La moyenne glissante ne permet pas d&rsquo;\u00e9tablir une tendance d&rsquo;\u00e9volution pour les niveaux pi\u00e9zom\u00e9triques mensuels minimaux, tout comme la tendance observ\u00e9e entre 1991 et 2024.<\/li><\/ul>\n\n\n\n<p class=\"has-black-color has-text-color\"><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img src=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/FRAIGNE-4.png\" alt=\"\"\/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<section id=\"5f8cdb\" class=\"section-5f8cdb gutentor-module gutentor-module-accordion\"><div class=\"grid-container\">\n<div id=\"7b046f\" class=\"wp-block-gutentor-m6-item section-7b046f gutentor-module gutentor-module-accordion-item\"><div class=\"gutentor-module-accordion-panel g-a-panel-5f8cdb\"><div class=\"gm-ah-5f8cdb gutentor-module-accordion-item-heading gutentor-module-icon-position-right\"><span class=\"gutentor-module-accordion-panel-handler\" role=\"button\"><span class=\"gutentor-module-accordion-panel-handler-label\">Autres stations pi\u00e9zom\u00e9triques<\/span><span class=\"gutentor-module-accordion-icon\"><i class=\"gm-aio-5f8cdb gutentor-module-accordion-icon-open fas fa-plus\"><\/i><i class=\"gm-aic-5f8cdb gutentor-module-accordion-icon-close fas fa-minus\"><\/i><\/span><\/span><\/div><div class=\"gm-ab-5f8cdb gutentor-module-accordion-body\">\n<div id=\"section-g7c2b54\" class=\"wp-block-gutentor-e0 section-g7c2b54 gutentor-element gutentor-element-advanced-text\"><div class=\"gutentor-text-wrap\"><p class=\"gutentor-text\">Les graphiques des tendances d&rsquo;\u00e9volution des niveaux pi\u00e9zom\u00e9triques mensuels minimaux des autres stations sont disponibles via les liens suivants:<\/p><\/div><\/div>\n\n\n\n<section id=\"gm7eecae3\" class=\"wp-block-gutentor-m4 section-gm7eecae3 gutentor-module gutentor-advanced-columns\"><div class=\"grid-container\"><div class=\"grid-row\">\n<div id=\"col-gm1bed75\" class=\"wp-block-gutentor-m4-col col-gm1bed75 gutentor-single-column  grid-lg-6 grid-md-12 grid-12\"><div id=\"section-gm1bed75\" class=\"section-gm1bed75 gutentor-col-wrap\">\n<p class=\"has-black-color has-text-color\">Alluvions de l&rsquo;\u00eele d&rsquo;Ol\u00e9ron<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/TERDOUX-4.png\">Terdoux<\/a><\/li><\/ul>\n\n\n\n<p class=\"has-black-color has-text-color\">Aquif\u00e8res du Cr\u00e9tac\u00e9<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li> <a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/AGNANT-4.png\">Agnant<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BAIGNES-4.png\">Baignes<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BIRON-4.png\">Biron<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/CESAIRE-4.png\">Cesaire<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/DIGNAC-4.png\">Dignac<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/JUILLAGU-4.png\">Juillagu<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LACLISSE-4.png\">La Clisse<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/POMMIERS-4.png\">Pommiers<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/POUSSARD-4.png\">Poussard<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/ROUFFIAC-4.png\">Rouffiac<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/SALIGNAC-4.png\">Salignac<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/TORSAC-4.png\">Torsac<\/a><\/li><\/ul>\n\n\n\n<p class=\"has-black-color has-text-color\">Aquif\u00e8res du Jurassique<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/AGRIS-4.png\">Agris<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2024\/10\/AIGRE-9.png\">Ai<\/a><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/AIGRE-4.png\">g<\/a><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2024\/10\/AIGRE-9.png\">re<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/ALLOUE-4.png\">Alloue<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/AMANT-4.png\">Amant<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BALLANS-4.png\">Ballans<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BELLEVUE-VARAIGNES-24-4.png\">Bellevue<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BELLICOU-4.png\">Bellicou<\/a><\/li><\/ul>\n<\/div><\/div>\n\n\n\n<div id=\"col-gmbd9003\" class=\"wp-block-gutentor-m4-col col-gmbd9003 gutentor-single-column  grid-lg-6 grid-md-12 grid-12\"><div id=\"section-gmbd9003\" class=\"section-gmbd9003 gutentor-col-wrap\">\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2024\/10\/BOIS-9.png\"><\/a><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BOIS-4.png\">Bois<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/CHAZELLE-4.png\">Chazelle<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/ENSIGNE-4.png\">Ensigne<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/FRAIGNE-4.png\">Fraigne<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/JUILLERS-4.png\">Juillers<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LA-ROCHEFOUCAULD-4.png\">La Rochefoucauld<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LIMALONG-4.png\">Limalong<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LONGRE-4.png\">Longre<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LORIGNE1-4.png\">Lorigne1<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LUNESSE-4.png\">Lunesse<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/MORNAC-4.png\">Mornac<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/MOUTON-4.png\">Mouton<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/OUTRES1-4.png\">Outres1<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/OUTRES2-4.png\">Outres2<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/PAIZAY-4.png\">Paizay<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/POIMIER-4.png\">Poimier<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/REORTE-4.png\">Reorte<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/SALLESVI-4.png\">SallesVI<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/SAUZE-4.png\">Sauze<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/STPROJET-4.png\">Stprojet<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/VILLENOU-4.png\">Villenou<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/VILLIERS-4.png\">Villiers<\/a><\/li><\/ul>\n\n\n\n<p class=\"has-black-color has-text-color\">Aquif\u00e8res de socle<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LA-PARENTIE-CHAMPNIERS-ET-REILHAC-24-4.png\">La Parentie<\/a><\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/section>\n<\/div><\/div><\/div>\n<\/div><\/section>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"has-text-color\" id=\"23-3-respect-des-d%C3%A9bits-seuils\" style=\"color:#0071a1\">3. Indice Pi\u00e9zom\u00e9trique Standardis\u00e9 (IPS)<\/h2>\n\n\n\n<p>L\u2019indice pi\u00e9zom\u00e9trique standardis\u00e9 (IPS) permet de suivre l\u2019\u00e9tat des nappes souterraines en comparant les niveaux d\u2019eau observ\u00e9s \u00e0 une situation normale. Il aide \u00e0 rep\u00e9rer les p\u00e9riodes o\u00f9 les nappes sont plus basses ou plus hautes que d\u2019habitude, ainsi qu\u2019\u00e0 analyser l\u2019\u00e9volution des s\u00e9cheresses et des phases de recharge au fil du temps.<\/p>\n\n\n\n<p><strong>*<\/strong>Certaines tendances d&rsquo;\u00e9volution sont statistiquement non significatives et sont pr\u00e9sent\u00e9es \u00e0 titre indicatif&nbsp;<\/p>\n\n\n\n<p class=\"has-black-color has-text-color\"> <strong><em>Exemple du pi\u00e9zom\u00e8tre St Fraigne<\/em><\/strong> <\/p>\n\n\n\n<p class=\"has-black-color has-text-color\">L&rsquo;exemple du <strong>pi\u00e9zom\u00e8tre de Saint-Fraigne<\/strong> illustre, \u00e0 travers l&rsquo;IPS, l&rsquo;\u00e9tat des nappes d&rsquo;eau souterraines. Cet indicateur permet d&rsquo;\u00e9valuer les s\u00e9cheresses hydrog\u00e9ologiques dans le temps et entre les diff\u00e9rents aquif\u00e8res.<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li>Depuis 2005, les nappes atteignent moins fr\u00e9quemment des niveaux tr\u00e8s \u00e9lev\u00e9s.<\/li><li>Les niveaux tr\u00e8s bas sont atteints de mani\u00e8re cyclique, avec des p\u00e9riodes de s\u00e9cheresse hydrog\u00e9ologique de plus en plus longues, comme en 2005, 2017 et 2022.<\/li><\/ul>\n\n\n\n<p class=\"has-black-color has-text-color\"><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" width=\"1024\" height=\"614\" src=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2024\/10\/FRAIGNE-4-1024x614.png\" alt=\"\" class=\"wp-image-2094\" srcset=\"https:\/\/www.charente2050.fr\/wp-content\/uploads\/2024\/10\/FRAIGNE-4-1024x614.png 1024w, https:\/\/www.charente2050.fr\/wp-content\/uploads\/2024\/10\/FRAIGNE-4-300x180.png 300w, https:\/\/www.charente2050.fr\/wp-content\/uploads\/2024\/10\/FRAIGNE-4-768x461.png 768w, https:\/\/www.charente2050.fr\/wp-content\/uploads\/2024\/10\/FRAIGNE-4-1536x922.png 1536w, https:\/\/www.charente2050.fr\/wp-content\/uploads\/2024\/10\/FRAIGNE-4-2048x1229.png 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<section id=\"502686\" class=\"section-502686 gutentor-module gutentor-module-accordion\"><div class=\"grid-container\">\n<div id=\"24d7ab\" class=\"wp-block-gutentor-m6-item section-24d7ab gutentor-module gutentor-module-accordion-item\"><div class=\"gutentor-module-accordion-panel g-a-panel-502686\"><div class=\"gm-ah-502686 gutentor-module-accordion-item-heading gutentor-module-icon-position-right\"><span class=\"gutentor-module-accordion-panel-handler\" role=\"button\"><span class=\"gutentor-module-accordion-panel-handler-label\">Autres stations pi\u00e9zom\u00e9triques<\/span><span class=\"gutentor-module-accordion-icon\"><i class=\"gm-aio-502686 gutentor-module-accordion-icon-open fas fa-plus\"><\/i><i class=\"gm-aic-502686 gutentor-module-accordion-icon-close fas fa-minus\"><\/i><\/span><\/span><\/div><div class=\"gm-ab-502686 gutentor-module-accordion-body\">\n<div id=\"section-gdf44e8\" class=\"wp-block-gutentor-e0 section-gdf44e8 gutentor-element gutentor-element-advanced-text\"><div class=\"gutentor-text-wrap\"><p class=\"gutentor-text\">Les graphiques des tendances d&rsquo;\u00e9volution de l&rsquo;IPS des autres stations sont disponibles via les liens suivants:<\/p><\/div><\/div>\n\n\n\n<section id=\"gm72d819a\" class=\"wp-block-gutentor-m4 section-gm72d819a gutentor-module gutentor-advanced-columns\"><div class=\"grid-container\"><div class=\"grid-row\">\n<div id=\"col-gmbf4f0a\" class=\"wp-block-gutentor-m4-col col-gmbf4f0a gutentor-single-column  grid-lg-6 grid-md-12 grid-12\"><div id=\"section-gmbf4f0a\" class=\"section-gmbf4f0a gutentor-col-wrap\">\n<p class=\"has-black-color has-text-color\">Alluvions de l&rsquo;\u00eele d&rsquo;Ol\u00e9ron<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/TERDOUX-5.png\">Terdoux<\/a><\/li><\/ul>\n\n\n\n<p class=\"has-black-color has-text-color\">Aquif\u00e8res du Cr\u00e9tac\u00e9<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/AGNANT-5.png\">Agnant<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BAIGNES-5.png\">Baignes<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2024\/10\/BIRON-4.png\">Bir<\/a><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BIRON-5.png\">o<\/a><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2024\/10\/BIRON-4.png\">n<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/CESAIRE-5.png\">Cesaire<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/DIGNAC-5.png\">Dignac<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/JUILLAGU-5.png\">Juillagu<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LACLISSE-5.png\">La Clisse<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/POMMIERS-5.png\">Pommiers<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/POUSSARD-5.png\">Poussard<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2024\/10\/ROUFFIAC-4.png\"><\/a><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/ROUFFIAC-5.png\">Rouffiac<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/SALIGNAC-5.png\">Salignac<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/TORSAC-5.png\">Torsac<\/a><\/li><\/ul>\n\n\n\n<p class=\"has-black-color has-text-color\">Aquif\u00e8res du Jurassique<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/AGRIS-5.png\">Agris<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/AIGRE-5.png\">Aigre<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/ALLOUE-5.png\">Alloue<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/AMANT-5.png\">Amant<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BALLANS-5.png\">Ballans<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BELLEVUE-VARAIGNES-24-5.png\">Bellevue<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BELLICOU-5.png\">Bellicou<\/a><\/li><\/ul>\n<\/div><\/div>\n\n\n\n<div id=\"col-gm3ef790\" class=\"wp-block-gutentor-m4-col col-gm3ef790 gutentor-single-column  grid-lg-6 grid-md-12 grid-12\"><div id=\"section-gm3ef790\" class=\"section-gm3ef790 gutentor-col-wrap\">\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BOIS-5.png\">Bois<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/CHAZELLE-5.png\">Chazelle<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/ENSIGNE-5.png\">Ensigne<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/FRAIGNE-5.png\">Fraigne<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/JUILLERS-5.png\">Juillers<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LA-ROCHEFOUCAULD-5.png\">La Rochefoucauld<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LIMALONG-5.png\">Limalong<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LONGRE-5.png\">Longre<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LORIGNE1-5.png\">Lorigne1<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LUNESSE-5.png\">Lunesse<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/MORNAC-5.png\">Mornac<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/MOUTON-5.png\">Mouton<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/OUTRES1-5.png\">Outres1<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/OUTRES2-5.png\">Outres2<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/PAIZAY-5.png\">Paizay<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/POIMIER-5.png\">Poimier<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/REORTE-5.png\">Reorte<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/SALLESVI-5.png\">SallesVI<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/SAUZE-5.png\">Sauze<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/STPROJET-5.png\">Stprojet<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/VILLENOU-5.png\">Villenou<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/VILLIERS-5.png\">Villiers<\/a><\/li><\/ul>\n\n\n\n<p class=\"has-black-color has-text-color\">Aquif\u00e8res de socle<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LA-PARENTIE-CHAMPNIERS-ET-REILHAC-24-5.png\">La Parentie<\/a><\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/section>\n<\/div><\/div><\/div>\n<\/div><\/section>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"has-text-color\" id=\"23-3-respect-des-d%C3%A9bits-seuils\" style=\"color:#0071a1\">4. P\u00e9riode de recharge et de vidange des nappes<\/h2>\n\n\n\n<p class=\"has-black-color has-text-color\">Les p\u00e9riodes de recharge et de vidange des nappes sont d\u00e9termin\u00e9es par l&rsquo;\u00e9tude des niveaux pi\u00e9zom\u00e9triques moyens quotidiens :<\/p>\n\n\n\n<ul class=\"is-style-none has-black-color has-text-color\"><li>Si le niveau du jour j est sup\u00e9rieur au niveau moyen quotidien du jour j\u221210j, alors on estime que la nappe est en p\u00e9riode de recharge.<\/li><li>Inversement, si le niveau du jour j est inf\u00e9rieur au niveau moyen quotidien du jour j\u221210j, alors la nappe est en p\u00e9riode de vidange.<\/li><\/ul>\n\n\n\n<p> <strong>*<\/strong>Certaines tendances d&rsquo;\u00e9volution sont statistiquement non significatives et sont pr\u00e9sent\u00e9es \u00e0 titre indicatif&nbsp; <\/p>\n\n\n\n<p class=\"has-black-color has-text-color\"><strong><em>Exemple du pi\u00e9zom\u00e8tre St Fraigne<\/em><\/strong> <\/p>\n\n\n\n<p class=\"has-black-color has-text-color\">Cet exemple illustre l&rsquo;\u00e9volution des p\u00e9riodes de recharge et de vidange de la nappe :<\/p>\n\n\n\n<ul class=\"is-style-default has-black-color has-text-color\"><li>Les p\u00e9riodes de recharge se situent entre septembre et janvier de 1993 \u00e0 2001, puis entre novembre et mars de 2002 \u00e0 2024.<\/li><li>Les p\u00e9riodes de vidange s&rsquo;\u00e9tendent de mars \u00e0 ao\u00fbt entre 1993 et 2001, puis d&rsquo;avril \u00e0 octobre entre 2002 et 2024.<\/li><\/ul>\n\n\n\n<p class=\"has-black-color has-text-color\">Un d\u00e9calage des p\u00e9riodes de recharge et de vidange de la nappe est observ\u00e9.<\/p>\n\n\n\n<p class=\"has-black-color has-text-color\"><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img src=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/FRAIGNE-6.png\" alt=\"\"\/><\/figure>\n\n\n\n<p><\/p>\n\n\n\n<section id=\"8d228f\" class=\"section-8d228f gutentor-module gutentor-module-accordion\"><div class=\"grid-container\">\n<div id=\"3acb2c\" class=\"wp-block-gutentor-m6-item section-3acb2c gutentor-module gutentor-module-accordion-item\"><div class=\"gutentor-module-accordion-panel g-a-panel-8d228f\"><div class=\"gm-ah-8d228f gutentor-module-accordion-item-heading gutentor-module-icon-position-right\"><span class=\"gutentor-module-accordion-panel-handler\" role=\"button\"><span class=\"gutentor-module-accordion-panel-handler-label\">Autres stations pi\u00e9zom\u00e9triques<\/span><span class=\"gutentor-module-accordion-icon\"><i class=\"gm-aio-8d228f gutentor-module-accordion-icon-open fas fa-plus\"><\/i><i class=\"gm-aic-8d228f gutentor-module-accordion-icon-close fas fa-minus\"><\/i><\/span><\/span><\/div><div class=\"gm-ab-8d228f gutentor-module-accordion-body\">\n<div id=\"section-g288513\" class=\"wp-block-gutentor-e0 section-g288513 gutentor-element gutentor-element-advanced-text\"><div class=\"gutentor-text-wrap\"><p class=\"gutentor-text\">Les graphiques des tendances d&rsquo;\u00e9volution des p\u00e9riodes de recharge et de vidange des nappes des autres stations sont disponibles via les liens suivants:<\/p><\/div><\/div>\n\n\n\n<section id=\"gm342e09b\" class=\"wp-block-gutentor-m4 section-gm342e09b gutentor-module gutentor-advanced-columns\"><div class=\"grid-container\"><div class=\"grid-row\">\n<div id=\"col-gmdf20c3\" class=\"wp-block-gutentor-m4-col col-gmdf20c3 gutentor-single-column  grid-lg-6 grid-md-12 grid-12\"><div id=\"section-gmdf20c3\" class=\"section-gmdf20c3 gutentor-col-wrap\">\n<p class=\"has-black-color has-text-color\">Alluvions de l&rsquo;\u00eele d&rsquo;Ol\u00e9ron<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/TERDOUX-6.png\">Terdoux<\/a><\/li><\/ul>\n\n\n\n<p class=\"has-black-color has-text-color\">Aquif\u00e8res du Cr\u00e9tac\u00e9<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/AGNANT-6.png\">Agnant<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BAIGNES-6.png\">Baignes<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BIRON-6.png\">Biron<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/CESAIRE-6.png\">Cesaire<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/DIGNAC-6.png\">Dignac<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/JUILLAGU-6.png\">Juillagu<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LACLISSE-6.png\">La Clisse<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/POMMIERS-6.png\">Pommiers<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/POUSSARD-6.png\">Poussard<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/ROUFFIAC-6.png\">Rouffiac<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/SALIGNAC-6.png\">Salignac<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/TORSAC-6.png\">Torsac<\/a><\/li><\/ul>\n\n\n\n<p class=\"has-black-color has-text-color\">Aquif\u00e8res du Jurassique<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/AGRIS-6.png\">Agris<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/AIGRE-6.png\">Aigre<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/ALLOUE-6.png\">Alloue<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/AMANT-6.png\">Amant<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BALLANS-6.png\">Ballans<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BELLEVUE-VARAIGNES-24-6.png\">Bellevue<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BELLICOU-6.png\">Bellicou<\/a><\/li><\/ul>\n<\/div><\/div>\n\n\n\n<div id=\"col-gmf8114a\" class=\"wp-block-gutentor-m4-col col-gmf8114a gutentor-single-column  grid-lg-6 grid-md-12 grid-12\"><div id=\"section-gmf8114a\" class=\"section-gmf8114a gutentor-col-wrap\">\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/BOIS-6.png\">Bois<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/CHAZELLE-6.png\">Chazelle<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/ENSIGNE-6.png\">Ensigne<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/FRAIGNE-6.png\">Fraigne<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/JUILLERS-6.png\">Juillers<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LA-ROCHEFOUCAULD-6.png\">La Rochefoucauld<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LIMALONG-6.png\">Limalong<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LONGRE-6.png\">Longre<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LORIGNE1-6.png\">Lorigne1<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LUNESSE-6.png\">Lunesse<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/MORNAC-6.png\">Mornac<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/MOUTON-6.png\">Mouton<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/OUTRES1-6.png\">Outres1<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/OUTRES2-6.png\">Outres2<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/PAIZAY-6.png\">Paizay<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/POIMIER-6.png\">Poimier<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/REORTE-6.png\">Reorte<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/SALLESVI-6.png\">SallesVI<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/SAUZE-6.png\">Sauze<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/STPROJET-6.png\">Stprojet<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/VILLENOU-6.png\">Villenou<\/a><\/li><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/VILLIERS-6.png\">Villiers<\/a><\/li><\/ul>\n\n\n\n<p class=\"has-black-color has-text-color\">Aquif\u00e8res de socle<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/LA-PARENTIE-CHAMPNIERS-ET-REILHAC-24-6.png\">La Parentie<\/a><\/li><\/ul>\n<\/div><\/div>\n<\/div><\/div><\/section>\n<\/div><\/div><\/div>\n<\/div><\/section>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-black-color has-text-color\"><\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-large-font-size\">Retrouver la fiche p\u00e9dagogique de l&rsquo;indicateur 6 ci-jointe :<\/p>\n\n\n\n<ul class=\"has-black-color has-text-color\"><li><a href=\"http:\/\/www.charente2050.fr\/wp-content\/uploads\/2025\/12\/Indicateur-6-Evolution-passee-des-niveaux-des-nappes2024.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">Fiche 6 : \u00c9volution pass\u00e9e des niveaux pi\u00e9zom\u00e9triques<\/a><\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>D\u00e9finition Les nappes souterraines sont une composante essentielle du cycle de l&rsquo;eau. Leur niveau d\u00e9pend des infiltrations, elles-m\u00eames influenc\u00e9es par les pr\u00e9cipitations. La recharge des nappes par infiltration se fait plus ou moins rapidement selon la quantit\u00e9 de pluie \u00e0 un moment donn\u00e9. Ces niveaux peuvent \u00eatre fortement affect\u00e9s par le climat, et le changement [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":438,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_coblocks_attr":"Arial,","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":""},"featured_image_src":null,"featured_image_src_square":null,"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"ab-block-post-grid-landscape":false,"ab-block-post-grid-square":false,"ultp_layout_landscape_large":false,"ultp_layout_landscape":false,"ultp_layout_portrait":false,"ultp_layout_square":false,"gb-block-post-grid-landscape":false,"gb-block-post-grid-square":false},"uagb_author_info":{"display_name":"adminCharente2050","author_link":"https:\/\/www.charente2050.fr\/?author=1"},"uagb_comment_info":0,"uagb_excerpt":"D\u00e9finition Les nappes souterraines sont une composante essentielle du cycle de l&rsquo;eau. Leur niveau d\u00e9pend des infiltrations, elles-m\u00eames influenc\u00e9es par les pr\u00e9cipitations. La recharge des nappes par infiltration se fait plus ou moins rapidement selon la quantit\u00e9 de pluie \u00e0 un moment donn\u00e9. Ces niveaux peuvent \u00eatre fortement affect\u00e9s par le climat, et le changement\u2026","_links":{"self":[{"href":"https:\/\/www.charente2050.fr\/index.php?rest_route=\/wp\/v2\/pages\/1575"}],"collection":[{"href":"https:\/\/www.charente2050.fr\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.charente2050.fr\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.charente2050.fr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.charente2050.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1575"}],"version-history":[{"count":40,"href":"https:\/\/www.charente2050.fr\/index.php?rest_route=\/wp\/v2\/pages\/1575\/revisions"}],"predecessor-version":[{"id":4863,"href":"https:\/\/www.charente2050.fr\/index.php?rest_route=\/wp\/v2\/pages\/1575\/revisions\/4863"}],"up":[{"embeddable":true,"href":"https:\/\/www.charente2050.fr\/index.php?rest_route=\/wp\/v2\/pages\/438"}],"wp:attachment":[{"href":"https:\/\/www.charente2050.fr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1575"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}