{"id":1169,"date":"2022-03-04T17:01:00","date_gmt":"2022-03-04T16:01:00","guid":{"rendered":"https:\/\/hervejoly.fr\/?p=1169"},"modified":"2022-03-04T17:01:00","modified_gmt":"2022-03-04T16:01:00","slug":"le-grau-de-carnon-selon-christine-combarnous","status":"publish","type":"post","link":"https:\/\/alternative-citoyenne.fr\/index.php\/2022\/03\/04\/le-grau-de-carnon-selon-christine-combarnous\/","title":{"rendered":"Le Grau de Carnon selon Christine Combarnous"},"content":{"rendered":"\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"Le Grau de Carnon\" width=\"960\" height=\"540\" src=\"https:\/\/www.youtube.com\/embed\/eymWEdyMZEY?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><figcaption class=\"wp-element-caption\">Christine Combarnous, g\u00e9ographe \u2013 urbaniste explique le probl\u00e8me du grau de Carnon<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Christine Combarnous : <\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Le Grau de Carnon arrive sur le canal du Rh\u00f4ne \u00e0 S\u00e8te.<br>Le canal du Rh\u00f4ne \u00e0 S\u00e8te a \u00e9t\u00e9 mis au gabarit international, c&#8217;est-\u00e0-dire que le tirant d&#8217;eau est de 2,50 m\u00e8tres.<br>Le barrage Anti-sel qui obstrue la moiti\u00e9 de la largeur du canal.<br>Ici nous avons la passerelle du chemin de Halage. Ce chemin de Halage a deux pierr\u00e9es \u00e9normes qui font aussi r\u00e9tr\u00e9cir la moiti\u00e9 de la largeur du canal.<br>Si bien que le canal du Rh\u00f4ne \u00e0 S\u00e8te se retrouve \u00e0 collecter les eaux de l&#8217;\u00e9tang de l&#8217;Or, les eaux du canal de P\u00e9rols que nous voyons ici.<br>Quand il y a des inondations dans les \u00e9tangs, cette eau essaie de partir vers la mer, mais les deux r\u00e9tr\u00e9cissements qui sont ici l&#8217;en emp\u00eachent.<br>Tous ces s\u00e9diments arrivent au Vidourle, arrivent en fond de baie d&#8217;Aigues-Mortes, l\u00e0 o\u00f9 il y a d\u00e9j\u00e0 de la s\u00e9dimentation, alors que si on permettait au Grau de Carnon de fonctionner correctement, \u00e7a irait en mer et \u00e7a viendrait approvisionner la d\u00e9rive littorale, et donc la d\u00e9fense des riverains de Carnon.<br>Le canal du Rh\u00f4ne \u00e0 S\u00e8te a \u00e9t\u00e9 mis au gabarit international avec un fond \u00e0 2,50 m\u00e8tres et actuellement il est sans cesse en dragage.<br>Pourquoi ?<br>Parce que les s\u00e9diments qui arrivent de l&#8217;\u00e9tang de l&#8217;Or viennent glisser jusque l\u00e0 et que les s\u00e9diments n&#8217;arrivent plus \u00e0 passer ici parce qu&#8217;il y a le barrage anti-sel, enfin les restes du barrage anti-sel et il faut absolument trouver une ligne de Talweg entre 2,50 m\u00e8tres ici et la mer \u00e0 plus de 2,50 m\u00e8tres.<br>Je ne sais pas si c&#8217;est \u00e0 3 m\u00e8tres de fond ou si c&#8217;est \u00e0 3,50 m\u00e8tres, l\u00e0 il faut le calculer.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Marianne Pelletier :<\/strong><br>Alors je te coupe mais parce que ici quand on arrive on voit bien une pancarte qui marque 1,20 m\u00e8tre au plus profond, donc on a bien un probl\u00e8me comment \u00e7a peut circuler si c&#8217;est plus bas ici et plus haut.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Christine Combarnous :<\/strong><br>Pour enlever les racines des deux c\u00f4t\u00e9s du barrage, il faut rabaisser le canal<br>Il faut que ce canal soit plus bas que 2 m\u00e8tres pour que tous les boues des \u00e9tangs puissent aller directement \u00e0 la mer.<br>Donc \u00e7a veut dire que la jet\u00e9e, il faut s\u00fbrement la prolonger pour qu&#8217;elle atteigne des fonds plus importants que ceux-l\u00e0, donc il faut prolonger la jet\u00e9e  en direction des fonds plus profonds, pour avoir une ligne de Talweg qui soit au plus haut \u00e0 moins 2,50 m\u00e8tres, et ici moins 3 m\u00e8tres.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le barrage anti-sel du Grau de Carnon collecte les s\u00e9diments et le canal doit \u00eatre creus\u00e9 pour que les boues des \u00e9tangs se d\u00e9placent vers la mer<\/p>\n","protected":false},"author":3,"featured_media":1170,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10],"tags":[],"class_list":["post-1169","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-environnement"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.8 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Le Grau de Carnon selon Christine Combarnous - Alternative Citoyenne - Mauguio &amp; 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