{"id":1430,"date":"2021-04-05T16:16:50","date_gmt":"2021-04-05T14:16:50","guid":{"rendered":"https:\/\/ports.bretagne.bzh\/?p=1430"},"modified":"2022-10-31T13:03:46","modified_gmt":"2022-10-31T12:03:46","slug":"historique-et-suivi-dragages-a-lorient","status":"publish","type":"post","link":"https:\/\/ports.bretagne.bzh\/actualites\/historique-et-suivi-dragages-a-lorient\/","title":{"rendered":"Historique et suivi du site d&#8217;immersion des produits de dragages \u00e0 Lorient"},"content":{"rendered":"\n<figure class=\"wp-block-image bloc-image full\">\n    <div class=\"image-container\">        \n        <img decoding=\"async\" src=\"https:\/\/www.bretagne.bzh\/app\/uploads\/sites\/4\/2021\/04\/suivi.jpg\" alt=\"\" data-rjs=\"3\">\n\n            <\/div>\n<\/figure>\n\n\n<h2 class=\"wp-block-heading\"><strong>Le choix du site<\/strong><\/h2>\n\n\n\n<p>D\u00e8s 1990, le site d\u2019immersion utilis\u00e9 depuis l\u2019apr\u00e8s guerre soulevant une forte opposition locale, il fut&nbsp;envisag\u00e9 de trouver un nouveau site adapt\u00e9. Apr\u00e8s une large concertation, men\u00e9e entre 1992 et 1994&nbsp;sous l\u2019\u00e9gide de la sous-pr\u00e9fecture de LORIENT et la mise en place d\u2019un groupe de pilotage, une \u00e9tude&nbsp;d\u2019impact des sites potentiels fut r\u00e9alis\u00e9e et pr\u00e9sent\u00e9e en 1996 aux \u00e9lus et administrations.<\/p>\n\n\n\n<p>Les conclusions de cette \u00e9tude ont conduit le groupe de pilotage \u00e0 retenir le site A actuellement utilis\u00e9.<\/p>\n\n\n\n<p>Ce site d\u2019immersion au nord-ouest de l\u2019\u00ceLE DE GROIX est donc utilis\u00e9 depuis 1997 pour accueillir les&nbsp;d\u00e9blais de dragages des ports de la rade de LORIENT ; sa dur\u00e9e d\u2019exploitation a \u00e9t\u00e9 estim\u00e9e \u00e0 30 ans&nbsp;pour un volume moyen annuel de s\u00e9diments immerg\u00e9s de 200 000 m\u00b3.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>La mise en place du suivi<\/strong>&nbsp;<\/h2>\n\n\n\n<p>A partir de l\u2019an 2000, afin d\u2019\u00e9valuer un \u00e9ventuel impact sur le milieu r\u00e9cepteur, un programme annuel&nbsp;de surveillance du site a \u00e9t\u00e9 mis en place puis, en janvier 2005, sur proposition du pr\u00e9sident du&nbsp;conseil d\u00e9partemental d\u2019hygi\u00e8ne, un comit\u00e9 de suivi du site a \u00e9t\u00e9 cr\u00e9\u00e9.<\/p>\n\n\n\n<p>Le suivi annuel du site d\u2019immersion comprend les op\u00e9rations suivantes :<\/p>\n\n\n\n<ul><li>un lev\u00e9 bathym\u00e9trique annuel pour comparaison des fonds,<\/li><li>une vid\u00e9o annuelle des fonds marins de la zone,<\/li><li>un suivi biologique annuel,<\/li><li>un suivi des op\u00e9rations de dragages et immersion (permis d\u2019immersion, cahier des charges des&nbsp;op\u00e9rations, volumes dragu\u00e9s, routes des chalands et points de clapage).<\/li><\/ul>\n\n\n\n<p>Reconduit chaque ann\u00e9e, ce suivi permet ainsi d\u2019avoir une bonne connaissance de l\u2019\u00e9volution du site&nbsp;par comparaison des r\u00e9sultats de l\u2019ann\u00e9e N avec ceux de l\u2019ann\u00e9e N-1.<br>Ces op\u00e9rations sont r\u00e9alis\u00e9es et\/ou encadr\u00e9es par l\u2019Antenne Portuaire et A\u00e9roportuaire de LORIENT, en&nbsp;collaboration avec Lorient agglom\u00e9ration et Naval-Group . La plupart&nbsp;des moyens, mat\u00e9riels et humains, n\u00e9cessaires \u00e0 la r\u00e9alisation de ce suivi sont fournis par des&nbsp;prestataires ext\u00e9rieurs, la R\u00e9gion BRETAGNE assurant la gestion et la coordination des diverses&nbsp;interventions.<br><br>Les rapports du suivi du site d&#8217;immersion des produits de dragages :<\/p>\n\n\n\n<ul><li><strong><a href=\"https:\/\/www.bretagne.bzh\/app\/uploads\/sites\/4\/2021\/04\/rapport_suivi_du_site_dimmersion_2013.pdf\">2013<\/a><\/strong><\/li><li><strong><a href=\"https:\/\/www.bretagne.bzh\/app\/uploads\/sites\/4\/2021\/04\/rapport_suivi_du_site_dimmersion_2014.pdf\">2014<\/a><\/strong><\/li><li><strong><a href=\"https:\/\/www.bretagne.bzh\/app\/uploads\/sites\/4\/2021\/04\/rapport_suivi_du_site_dimmersion_2015.pdf\">2015<\/a><\/strong><\/li><li><a href=\"https:\/\/www.bretagne.bzh\/app\/uploads\/sites\/4\/2021\/04\/dossier2016_suivisiteimmersion.pdf\"><strong>2016<\/strong><\/a><\/li><li><strong><a href=\"https:\/\/www.bretagne.bzh\/app\/uploads\/sites\/4\/2021\/04\/dossier2017_siteimmersion.pdf\">2017<\/a><\/strong><\/li><li><a href=\"https:\/\/www.bretagne.bzh\/app\/uploads\/sites\/4\/2021\/04\/rapport_site_immersion_2018.pdf\"><strong>2018<\/strong><\/a><\/li><li><a href=\"https:\/\/www.bretagne.bzh\/app\/uploads\/sites\/4\/2021\/04\/Rapport_Synthese_2019_complet.pdf\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>2019<\/strong><\/a><\/li><li><a href=\"https:\/\/www.bretagne.bzh\/app\/uploads\/sites\/4\/2022\/01\/Rapport_Synthese_2020_avec-Annexes.pdf?_ga=2.46131874.780477351.1641802120-805090750.1641571242\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>2020<\/strong><\/a><\/li><li><a href=\"https:\/\/www.bretagne.bzh\/app\/uploads\/sites\/4\/2022\/10\/Rapport_Synthese_2021.pdf\"><strong>2021<\/strong><\/a><\/li><\/ul>\n\n\n\n<h2 class=\"text-center title-ressources\">En pratique<\/h2>\n\n                ","protected":false},"excerpt":{"rendered":"Propri\u00e9taire de nombreux port en Bretagne, la R\u00e9gion r\u00e9alise chaque ann\u00e9e des op\u00e9ration de dragage sur ces derniers. ","protected":false},"author":25,"featured_media":689,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"port-associe":[29],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Historique et suivi du site d&#039;immersion des produits de dragages \u00e0 Lorient &#183; Ports de Bretagne<\/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:\/\/ports.bretagne.bzh\/actualites\/historique-et-suivi-dragages-a-lorient\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Historique et suivi du site d&#039;immersion des produits de dragages \u00e0 Lorient &#183; Ports de Bretagne\" \/>\n<meta property=\"og:description\" content=\"Propri\u00e9taire de nombreux port en Bretagne, la R\u00e9gion r\u00e9alise chaque ann\u00e9e des op\u00e9ration de dragage sur ces derniers.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/ports.bretagne.bzh\/actualites\/historique-et-suivi-dragages-a-lorient\/\" \/>\n<meta property=\"og:site_name\" content=\"Ports de Bretagne\" \/>\n<meta property=\"article:published_time\" content=\"2021-04-05T14:16:50+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2022-10-31T12:03:46+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.bretagne.bzh\/app\/uploads\/sites\/4\/2020\/08\/20270817_\u00a9Panoramic-Bretagne_RB_0080631_1920_1-700x394.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"700\" \/>\n\t<meta property=\"og:image:height\" content=\"394\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"slecarpentier\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u00c9crit par\" \/>\n\t<meta name=\"twitter:data1\" content=\"slecarpentier\" \/>\n\t<meta name=\"twitter:label2\" content=\"Dur\u00e9e de lecture estim\u00e9e\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/ports.bretagne.bzh\/actualites\/historique-et-suivi-dragages-a-lorient\/\",\"url\":\"https:\/\/ports.bretagne.bzh\/actualites\/historique-et-suivi-dragages-a-lorient\/\",\"name\":\"Historique et suivi du site d'immersion des produits de dragages \u00e0 Lorient &#183; 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