{"id":2073,"date":"2020-10-27T14:28:33","date_gmt":"2020-10-27T13:28:33","guid":{"rendered":"http:\/\/lesrobines.fr\/?p=2073"},"modified":"2020-10-27T14:59:10","modified_gmt":"2020-10-27T13:59:10","slug":"notre-littoral-serode-franchement","status":"publish","type":"post","link":"http:\/\/lesrobines.fr\/index.php\/2020\/10\/27\/notre-littoral-serode-franchement\/","title":{"rendered":"Notre littoral s\u2019\u00e9rode franchement"},"content":{"rendered":"

Vendredi 16 octobre \u00e0 9h30 – Dans le vaste bestiaire des r\u00e9unions auxquelles nous sommes invit\u00e9.es, il y a les \u00ab Copil \u00bb, les comit\u00e9s de pilotage qui permettent aux \u00e9lus et aux diff\u00e9rentes instances territoriales de faire le point sur un projet en particulier. Mon premier copil, donc, a port\u00e9 sur \u00ab l\u2019\u00e9tude des structures littorales jouant un r\u00f4le vis \u00e0 vis des al\u00e9as littoraux \u00bb. Vous savez, la fameuse \u00ab premi\u00e8re \u00e9tude sur la submersion marine\u00a0\u00e0 800\u00a0000 euros<\/em> \u00bb \u00e9voqu\u00e9e lors de la formation du SMDA.<\/p>\n

A cause du Covid, la r\u00e9union a lieu dans un coin de gymnase \u00e0 Sigean : il caille. Et toujours \u00e0 cause du Covid, l\u2019\u00e9tude en question, lanc\u00e9e en f\u00e9vrier, a d\u00fb s\u2019adapter. La perception du risque a \u00e9t\u00e9 appr\u00e9hend\u00e9e par Nicolas Proust (BRL ing\u00e9nierie) au travers de 32 interviews d\u2019\u00e9lus et de techniciens effectu\u00e9es par visioconf\u00e9rence. Une approche \u00ab\u00a0so 2020″<\/em> qui a montr\u00e9 ceci\u00a0: pour les \u00ab\u00a0locaux\u00a0\u00bb interview\u00e9s, la menace vient davantage des crues de l\u2019Aude que de la M\u00e9diterran\u00e9e et de la submersion marine\u00a0; les enjeux per\u00e7us ne concerneraient que quelques campings de bord de mer et des voies de circulation.<\/p>\n

Ensuite, Mathieu Gervais, de l\u2019entente interd\u00e9partementale de d\u00e9moustication (EID), \u00a0a pr\u00e9sent\u00e9 une analyse plus factuelle de l\u2019\u00e9rosion du littoral. D\u2019abord la dynamique g\u00e9n\u00e9rale depuis l\u2019antiquit\u00e9 avec le changement de cours de l\u2019Aude au XVIIIe si\u00e8cle, le comblement des lagunes et la mise en place du cordon dunaire, premi\u00e8re protection contre le vent et les temp\u00eates. Ensuite, une analyse de photos a\u00e9riennes et satellitaires qui a permis de suivre l\u2019\u00e9volution des surfaces de plage depuis 1895. Et c\u2019est l\u00e0 que les choses se g\u00e2tent.<\/p>\n

Car si notre littoral a longtemps re\u00e7u de grandes quantit\u00e9s de sable, ce n\u2019est plus le cas aujourd\u2019hui. A partir de 1977 \u2013 suite \u00e0 la Mission Racine qui a urbanis\u00e9 notre c\u00f4te -, quatre points d\u2019\u00e9rosion ont \u00e9merg\u00e9 \u00e0 Leucate, \u00e0 la plage des chalets, aux cabanes de Fleury et \u00e0 Valras. Pendant longtemps, cet impact est rest\u00e9 g\u00e9ographiquement limit\u00e9 et le sable continuait \u00e0 s\u2019accumuler ailleurs, en particulier \u00e0 Port La Nouvelle.<\/p>\n

Mais depuis 2009, les choses se sont d\u00e9grad\u00e9es : la totalit\u00e9 du littoral, y compris les plages de Port la Nouvelle, est d\u00e9sormais entr\u00e9e dans une phase de forte \u00e9rosion. Les chiffres sont sid\u00e9rants : \u00e0 la Vieille Nouvelle, on parle\u00a0 d’un recul du trait de c\u00f4te de 4 \u00e0 8 m\u00e8tres par an. Les raisons de cette \u00e9rosion massive sont encore floues mais il est \u00e9vident que les digues et l\u2019urbanisation n\u2019aident pas. Pour appr\u00e9hender la probl\u00e9matique, un agent de Leucate propose de contacter l\u2019Observatoire de la c\u00f4te sableuse catalane qui suit depuis d\u00e9j\u00e0 plusieurs ann\u00e9es ce ph\u00e9nom\u00e8ne dans les PO.<\/p>\n

Pour aller plus loin, un inventaire des \u00ab ouvrages \u00bb de notre littoral est en cours. Et si je mets \u00ab ouvrage \u00bb entre guillemets, c\u2019est que par ce terme, BRL ing\u00e9nierie englobe les structures ouvrag\u00e9es (comme les digues et les enrochements) et les milieux naturels (comme les cordons dunaires) ce qui fait r\u00e9agir une repr\u00e9sentante du PNR. A raison. Des \u00e9tudes men\u00e9es sur la c\u00f4te Atlantique ont d\u2019ores et d\u00e9j\u00e0 point\u00e9 le r\u00f4le pr\u00e9pond\u00e9rant des milieux naturels pour pr\u00e9venir les risques de submersion. Ne pas les nommer clairement, ne pas les diff\u00e9rencier au d\u00e9but de l\u2019\u00e9tude, ce serait prendre le risque de ne pas remarquer les services qu\u2019ils rendent contre l\u2019\u00e9rosion ou la submersion.<\/p>\n

Des \u00e9lus ont en outre point\u00e9 les grandes absentes de l\u2019analyse actuelle, les lagunes dont le niveau suit pourtant celui de la mer et qui, pour plusieurs participants, m\u00e9riteraient d\u2019\u00eatre aussi suivies. Je n\u2019ai pas eu l\u2019impression que cette remarque ait \u00e9t\u00e9 vraiment entendue.<\/p>\n

En fin de r\u00e9union, on a enfin eu la pr\u00e9sentation un brin lunaire d\u2019une graphiste qui a expos\u00e9 ses choix de couleurs et de police pour une plaquette qui rendra compte au grand public de l\u2019action. L\u2019objectif est louable mais pas s\u00fbre que le moyen soit bon.<\/p>\n","protected":false},"excerpt":{"rendered":"

Vendredi 16 octobre \u00e0 9h30 – Dans le vaste bestiaire des r\u00e9unions auxquelles nous sommes invit\u00e9.es, il y a les \u00ab Copil \u00bb, les comit\u00e9s de pilotage qui permettent aux \u00e9lus et aux diff\u00e9rentes instances territoriales de faire le point sur un projet en particulier. Mon premier copil, donc, a […]<\/p>\n","protected":false},"author":2,"featured_media":1913,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0},"categories":[163],"tags":[237,233,236,234,235,166,180,217],"yoast_head":"\nNotre littoral s\u2019\u00e9rode franchement - Les Robin.e.s<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/lesrobines.fr\/index.php\/2020\/10\/27\/notre-littoral-serode-franchement\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Notre littoral s\u2019\u00e9rode franchement - Les Robin.e.s\" \/>\n<meta property=\"og:description\" content=\"Vendredi 16 octobre \u00e0 9h30 – Dans le vaste bestiaire des r\u00e9unions auxquelles nous sommes invit\u00e9.es, il y a les \u00ab Copil \u00bb, les comit\u00e9s de pilotage qui permettent aux \u00e9lus et aux diff\u00e9rentes instances territoriales de faire le point sur un projet en particulier. Mon premier copil, donc, a […]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/lesrobines.fr\/index.php\/2020\/10\/27\/notre-littoral-serode-franchement\/\" \/>\n<meta property=\"og:site_name\" content=\"Les Robin.e.s\" \/>\n<meta property=\"article:published_time\" content=\"2020-10-27T13:28:33+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2020-10-27T13:59:10+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/lesrobines.fr\/wp-content\/uploads\/2020\/09\/clean-1223168_1280.png\" \/>\n\t<meta property=\"og:image:width\" content=\"1280\" \/>\n\t<meta property=\"og:image:height\" content=\"935\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Viviane Thivent\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"Viviane Thivent\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/lesrobines.fr\/index.php\/2020\/10\/27\/notre-littoral-serode-franchement\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/lesrobines.fr\/index.php\/2020\/10\/27\/notre-littoral-serode-franchement\/\"},\"author\":{\"name\":\"Viviane Thivent\",\"@id\":\"http:\/\/lesrobines.fr\/#\/schema\/person\/ce46a05f64a4ca045744932083394f6c\"},\"headline\":\"Notre littoral s\u2019\u00e9rode franchement\",\"datePublished\":\"2020-10-27T13:28:33+00:00\",\"dateModified\":\"2020-10-27T13:59:10+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/lesrobines.fr\/index.php\/2020\/10\/27\/notre-littoral-serode-franchement\/\"},\"wordCount\":723,\"commentCount\":1,\"publisher\":{\"@id\":\"http:\/\/lesrobines.fr\/#organization\"},\"keywords\":[\"BRL\",\"copil\",\"EID\",\"lagune\",\"littoral\",\"SMDA\",\"SMMAR\",\"submersions marines\"],\"articleSection\":[\"Carnet d'\u00e9lu.es\"],\"inLanguage\":\"fr-FR\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/lesrobines.fr\/index.php\/2020\/10\/27\/notre-littoral-serode-franchement\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/lesrobines.fr\/index.php\/2020\/10\/27\/notre-littoral-serode-franchement\/\",\"url\":\"https:\/\/lesrobines.fr\/index.php\/2020\/10\/27\/notre-littoral-serode-franchement\/\",\"name\":\"Notre littoral s\u2019\u00e9rode franchement - 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