{"id":38410,"date":"2025-12-23T17:33:30","date_gmt":"2025-12-23T16:33:30","guid":{"rendered":"https:\/\/www.cnr.tm.fr\/activities\/environnement\/"},"modified":"2026-08-19T14:33:52","modified_gmt":"2026-08-19T12:33:52","slug":"environnement","status":"publish","type":"page","link":"https:\/\/www.cnr.tm.fr\/en\/activities\/environnement\/","title":{"rendered":"Environment"},"content":{"rendered":"\n    \n\n\n\n<div class=\"banner_wrap as--txt-light\" style=background-color:#54BEDA banner-reveal reveal>\n            <div class=\"banner-content editor-wysiwyg\">\n                            <div class=\"breadcrumb-line\"><ol class=\"c-breadcrumb\" aria-label=\"breadcrumb\" role=\"navigation\" itemscope itemtype=\"http:\/\/schema.org\/BreadcrumbList\"><li itemprop=\"itemListElement\" itemscope itemtype=\"http:\/\/schema.org\/ListItem\"><a itemprop=\"item\" href=\"https:\/\/www.cnr.tm.fr\/en\/\" aria-level=\"1\"><span itemprop=\"name\">Home<\/span><\/a><meta itemprop=\"position\" content=\"1\"\/><\/li><li itemprop=\"itemListElement\" itemscope itemtype=\"http:\/\/schema.org\/ListItem\"><span itemprop=\"name\"><\/span><meta itemprop=\"position\" content=\"2\"\/><\/li><\/ol><\/div>\n                                        <h1 class=\"a-title-1\">Environment<\/h1>\n                                        <p>In its capacity of hydroelectricity producer and developer of the Rhone, CNR began its actions <strong>to preserve the river environment<\/strong> at the end of the 1990s. It has mobilised and increased the number of its projects to preserve the natural heritage of the Rhone by maintaining dikes and its own structures, with respect given to the fauna and flora along the river and by collaborating with different actors in the territories.<\/p>\n<p>In parallel with its economic activities, CNR is responsible for protecting and preserving <strong>30,000 hectares of land and wetland<\/strong> in which live a wealth of biodiversity. Its long-established expertise and its vision of the river as a whole enable it to rely on its unique experience to ensure respect is given to the environment along the Rhone.<\/p>\n<p>The environment is a major concern for CNR, fully integrated in the development of its activities and in its responsibilities as developer of the Rhone.<\/p>\n\n                                <\/div>\n\n                    <div class=\"banner-pin\" banner-reveal-pin>\n                <div class=\"banner-images\">\n                                        <div class=\"slider-wrap\" banner-gallery dir=\"rtl\">\n                        <div class=\"slider\" data-slick='{\"slidesToShow\": 1, \"infinite\": true, \"arrows\": false, \"autoplay\": true, \"rtl\": true}'>\n                                                                                            <div class=\"banner-image\">\n                                    <img decoding=\"async\" src=\"https:\/\/www.cnr.tm.fr\/app\/uploads\/2025\/12\/CNR_environnement_fleuve.jpg\" alt=\"\" loading=\"eager\" fetchpriority=\"high\">\n                                <\/div>\n                                                    <\/div>\n                    <\/div>\n                    <button type=\"button\" class=\"slick-autoplay-toggle\" aria-label=\"Mettre le d\u00e9filement automatique en pause \/ Jouer\">\n                            <svg class=\"a-icon as--12 slick-pause-icon as--white\" aria-hidden=\"true\"\n         focusable=\"false\">\n        <use xlink:href=\"\/app\/themes\/cnr-acti\/assets\/img\/svg\/icon-sprite.svg#icon-pause\"><\/use>\n    <\/svg>\n\n                            <svg class=\"a-icon as--12 slick-play-icon as--white\" aria-hidden=\"true\"\n         focusable=\"false\">\n        <use xlink:href=\"\/app\/themes\/cnr-acti\/assets\/img\/svg\/icon-sprite.svg#icon-play\"><\/use>\n    <\/svg>\n\n                        <span class=\"slick-pause-text sr-only\">Pause<\/span>\n                        <span class=\"slick-play-text sr-only\">Jouer<\/span>\n                    <\/button>\n                <\/div>\n            <\/div>\n        \n            <\/div>\n\n\n\n\n    \n                \n\n<section class=\"content-section as--normal-margin as--txt-dark \" >\n            <div class=\"inner-wrap\" auto-reveal>\n            <div class=\"editor-wysiwyg h-mb-40\">\n                <h2 class=\"a-title-2\">Preserving biodiversity along the Rhone through essential actions<\/h2>\n<p>The preservation of ecosystems and biodiversity is a major environmental concern, at a time when a large number of species are threatened with extinction. CNR relies on several levers to ensure its commitment <strong>to preserving and restoring the biodiversity in the territories<\/strong> in which it develops its activities.<\/p>\n\n            <\/div>\n        <\/div>\n        <div class=\"inner-wrap \">\n        <div class=\"as--column as--columns-2\" auto-reveal>\n                            <div class=\"as--column__item editor-wysiwyg h-align-left\">\n                                                                                                        <h3 class=\"a-title-3\"><span style=\"color: #239bd7;\">The dikes of the Rhone: a valuable ecosystem for biodiversity<\/span><\/h3>\n<p>Maintaining the dikes of the Rhone is a challenge in terms of the environment and safety, both of which come under the responsibility of CNR. By maintaining the vegetation, CNR <strong>combines industrial development, safety and environmental preservation along the river<\/strong>.<\/p>\n<p>On part of the dikes of the Rhone, this is done in collaboration with local livestock farmers and their herds: <strong>grazing is a very good example of preserving biodiversity<\/strong> as it avoids using pesticides and limits the passage of mowers to once every 4 years. \u00a0<\/p>\n\n                                                                                                                                    <\/div>\n                            <div class=\"as--column__item editor-wysiwyg h-align-left\">\n                                                                                                                                        <div class=\"editor-img as--rounded\">\n                                    <picture>\n                                        <img decoding=\"async\" src=\"https:\/\/www.cnr.tm.fr\/app\/uploads\/2025\/12\/CNR_pastoralisme_entretien_digue-450x450.jpg\" alt=\"\">\n                                    <\/picture>\n                                <\/div>\n                                                                                                                                    <\/div>\n                    <\/div>\n    <\/div>\n<\/section>\n\n\n\n    \n    \n\n<section class=\"content-section as--normal-margin as--txt-dark as--bgcolor\" style=background-color:#68C6DF33>\n        <div class=\"inner-wrap \">\n        <div class=\"as--column as--columns-2\" reveal>\n                            <div class=\"as--column__item editor-wysiwyg h-align-left\">\n                                                                                                                                        <div class=\"editor-img as--rounded\">\n                                    <picture>\n                                        <img decoding=\"async\" src=\"https:\/\/www.cnr.tm.fr\/app\/uploads\/2025\/12\/CNR_passe_a_poissons_continuite_piscicole-450x450.jpg\" alt=\"\">\n                                    <\/picture>\n                                <\/div>\n                                                                                                                                    <\/div>\n                            <div class=\"as--column__item editor-wysiwyg h-align-left\">\n                                                                                                        <h3 class=\"a-title-3\"><span style=\"color: #239bd7;\">Facilitating the breeding of fish species<\/span><\/h3>\n<p>Aware of the impact of its dams on fish species along the Rhone, CNR builds and regularly maintains a <strong>large number of fish passes to ensure continuity for fish between different sections of the river<\/strong>.\u00a0<\/p>\n<p>They allow different migrating species to return to their spawning grounds, a flow vital to the <strong>development of biodiversity on the Rhone<\/strong>.<\/p>\n\n                                                                                                                                                    <div class=\"buttons-group h-mt-40\">\n                                                                                    <a href=\"https:\/\/www.cnr.tm.fr\/en\/grand-projet\/passe-a-poissons-de-la-feyssine\/\" class=\"a-button no-external-style as--color-4\" target=\"\">Zoom on the fish pass of Feyssine <\/a>\n                                                                            <\/div>\n                                                                                                                                                                    <\/div>\n                    <\/div>\n    <\/div>\n<\/section>\n\n\n\n    \n                \n\n<section class=\"content-section as--normal-margin as--txt-dark \" >\n        <div class=\"inner-wrap \">\n        <div class=\"as--column as--columns-2\" reveal>\n                            <div class=\"as--column__item editor-wysiwyg h-align-left\">\n                                                                                                        <h3 class=\"a-title-3\"><span style=\"color: #239bd7;\">Favouring pollinators to preserve the flora<\/span><\/h3>\n<p>Greatly affected by human activity and climate change, <strong>pollinating insects play an essential role<\/strong> in the reproduction of wild plants and thus in the preservation of biodiversity.<\/p>\n<p>CNR develops concrete actions to increase the number of shelters and food sources for these species threatened with extinction through its involvement in the National Action Plan and alongside specialised organisations.<\/p>\n<p>&nbsp;<\/p>\n\n                                                                                                                                    <\/div>\n                            <div class=\"as--column__item editor-wysiwyg h-align-left\">\n                                                                                                                                        <div class=\"editor-img as--rounded\">\n                                    <picture>\n                                        <img decoding=\"async\" src=\"https:\/\/www.cnr.tm.fr\/app\/uploads\/2026\/01\/CNR_apiculture_abeille-450x450.jpg\" alt=\"\">\n                                    <\/picture>\n                                <\/div>\n                                                                                                                                    <\/div>\n                    <\/div>\n    <\/div>\n<\/section>\n\n\n\n    \n    \n\n<section class=\"content-section as--normal-margin as--txt-dark as--bgcolor\" style=background-color:#68C6DF33>\n        <div class=\"inner-wrap \">\n        <div class=\"as--column as--columns-2\" reveal>\n                            <div class=\"as--column__item editor-wysiwyg h-align-left\">\n                                                                                                                                        <div class=\"editor-img as--rounded\">\n                                    <picture>\n                                        <img decoding=\"async\" src=\"https:\/\/www.cnr.tm.fr\/app\/uploads\/2025\/12\/CNR_oiseaux_migrateurs-450x450.jpg\" alt=\"\">\n                                    <\/picture>\n                                <\/div>\n                                                                                                                                    <\/div>\n                            <div class=\"as--column__item editor-wysiwyg h-align-left\">\n                                                                                                        <h3 class=\"a-title-3\"><span style=\"color: #239bd7;\">Taking migrating birds into account<\/span><\/h3>\n<p>CNR and its subsidiary <a href=\"https:\/\/vensolair.fr\/\" target=\"_blank\" rel=\"noopener\">Vensolair<\/a> carry out an environmental study for each of the latter\u2019s wind farm projects that includes the <strong>study of the paths taken by migrating bird paths<\/strong>.<\/p>\n<p>If a risk is apparent, the windfarm project is displaced and may even be cancelled so as <strong>not to disturb the natural migration paths<\/strong> of the species concerned.<\/p>\n\n                                                                                                                                    <\/div>\n                    <\/div>\n    <\/div>\n<\/section>\n\n\n\n    \n                \n\n<section class=\"content-section as--normal-margin as--txt-dark \" >\n            <div class=\"inner-wrap\" reveal>\n            <div class=\"editor-wysiwyg h-mb-40\">\n                <h2>Science in the service of the environment<\/h2>\n<h3 class=\"a-title-3\"><span style=\"color: #239bd7;\">Environmental DNA<\/span><\/h3>\n<p>Since 2013, CNR uses and participates in the <strong>development of biodiversity inventory techniques using environmental DNA (eDNA)<\/strong>. Thus, the Rhone is one of the first rivers in the world to benefit from this technique with high potential to monitor its biodiversity.<\/p>\n\n            <\/div>\n        <\/div>\n        <div class=\"inner-wrap \">\n        <div class=\"as--column as--columns-2\" reveal>\n                            <div class=\"as--column__item editor-wysiwyg h-align-left\">\n                                                                                                        <p>A founding member of the international alliance <a href=\"https:\/\/www.vigilife.org\/en\/\" target=\"_blank\" rel=\"noopener\">Vigilife<\/a>, CNR works on the project <strong>\u201cRh\u00f4ne Fleuve Sentinelle\u201d<\/strong>\u00a0aimed at deploying a network to use eDNA to fully monitor the Rhone from its source to its delta.<\/p>\n<p>The first phase of this project will consist in launching a<strong> demonstrator at 15 stations distributed between Switzerland and France <\/strong>in order to organise a more ambitious project in the river basin, by developing the scientific, technical, institutional and financial partnerships required for its long-term deployment.<\/p>\n\n                                                                                                                                    <\/div>\n                            <div class=\"as--column__item editor-wysiwyg h-align-left\">\n                                                                                                                                        <div class=\"editor-img as--rounded\">\n                                    <picture>\n                                        <img decoding=\"async\" src=\"https:\/\/www.cnr.tm.fr\/app\/uploads\/2026\/01\/CNR_anguilles_Rhone-450x450.jpg\" alt=\"\">\n                                    <\/picture>\n                                <\/div>\n                                                                                                                                    <\/div>\n                    <\/div>\n    <\/div>\n<\/section>\n\n\n\n    \n    \n\n<section class=\"content-section as--normal-margin as--txt-dark as--bgcolor\" style=background-color:#68C6DF33>\n        <div class=\"inner-wrap \">\n        <div class=\"as--column as--columns-2\" reveal>\n                            <div class=\"as--column__item editor-wysiwyg h-align-left\">\n                                                                                                                                        <div class=\"editor-img as--rounded\">\n                                    <picture>\n                                        <img decoding=\"async\" src=\"https:\/\/www.cnr.tm.fr\/app\/uploads\/2025\/12\/CNR_lutte_contre_la_pollution_plastique-450x450.jpg\" alt=\"\">\n                                    <\/picture>\n                                <\/div>\n                                                                                                                                    <\/div>\n                            <div class=\"as--column__item editor-wysiwyg h-align-left\">\n                                                                                                        <h3 class=\"a-title-3\"><span style=\"color: #239bd7;\">The combat against plastic pollution<\/span><\/h3>\n<p>As developer of the Rhone, CNR is not responsible for the plastic pollution in the river but it is involved, alongside the <a href=\"https:\/\/www.eaurmc.fr\" target=\"_blank\" rel=\"noopener\">Rhone-Mediterranean-Corsica Water Agency<\/a>, the <a href=\"https:\/\/fondationtaraocean.org\/en\/home\/\" target=\"_blank\" rel=\"noopener\">Fondation Tara Oc\u00e9an<\/a>, <a href=\"https:\/\/plasticatsea.com\/en\/\" target=\"_blank\" rel=\"noopener\">Plastic@Sea<\/a> and research laboratories in <strong>increasing knowledge<\/strong> about this problem.<\/p>\n\n                                                                                                                                    <\/div>\n                    <\/div>\n    <\/div>\n<\/section>\n\n\n\n    \n                \n\n<section class=\"content-section as--normal-margin as--txt-dark \" >\n            <div class=\"inner-wrap\" reveal>\n            <div class=\"editor-wysiwyg h-mb-40\">\n                <h2>Restoring the oxbows of the Rhone: a commitment since 1998<\/h2>\n<p>The oxbows were adversely affected by the industrialisation of the Rhone and the creation of a canal for river transport. In 1998, CNR and local actors started a <strong>huge ecological restoration programme<\/strong>.<\/p>\n\n            <\/div>\n        <\/div>\n        <div class=\"inner-wrap \">\n        <div class=\"as--column as--columns-2\" reveal>\n                            <div class=\"as--column__item editor-wysiwyg h-align-left\">\n                                                                                                        <p>Renewed in 2006 by the Rhone Plan, the aim of the programme is <strong>to restore more natural functioning to the river<\/strong>, especially regarding sediment transport, favouring biodiversity and increasing the positive effects of floods in the oxbows.<\/p>\n<p>Thus, CNR&#8217;s mission is to anticipate and prepare the river for the impacts of global warming.<\/p>\n\n                                                                                                                                                    <div class=\"buttons-group h-mt-40\">\n                                                                                    <a href=\"https:\/\/www.cnr.tm.fr\/en\/grand-projet\/restauration-ecologique-du-rhone\/\" class=\"a-button no-external-style as--color-4\" target=\"\">Know more about the ecological restoration of the Rhone <\/a>\n                                                                            <\/div>\n                                                                                                                                                                    <\/div>\n                            <div class=\"as--column__item editor-wysiwyg h-align-left\">\n                                                                                                                                        <div class=\"editor-img as--rounded\">\n                                    <picture>\n                                        <img decoding=\"async\" src=\"https:\/\/www.cnr.tm.fr\/app\/uploads\/2025\/12\/CNR_restauration_ecologique_du_Rhone-450x450.jpg\" alt=\"\">\n                                    <\/picture>\n                                <\/div>\n                                                                                                                                    <\/div>\n                    <\/div>\n    <\/div>\n<\/section>\n\n\n\n    \n    \n\n<section class=\"content-section as--normal-margin as--txt-dark as--bgcolor\" style=background-color:#68C6DF33>\n            <div class=\"inner-wrap\" reveal>\n            <div class=\"editor-wysiwyg h-mb-40\">\n                <h2 class=\"a-title-2\">Sediment management: responsibility with considerable environmental stakes<\/h2>\n<p>In close collaboration with the <a href=\"https:\/\/ww2.sig-ge.ch\/en\/home-en\" target=\"_blank\" rel=\"noopener\">Services Industriels de Gen\u00e8ve<\/a> (SIG) and the Soci\u00e9t\u00e9 des Forces Motrices de Chancy-Pougny (SFMCP), CNR\u2019s teams monitor throughout the year the levels of sediments (gravel, silt, sand, etc.) that accumulate at the foot of the dams.<\/p>\n\n            <\/div>\n        <\/div>\n        <div class=\"inner-wrap \">\n        <div class=\"as--column as--columns-2\" reveal>\n                            <div class=\"as--column__item editor-wysiwyg h-align-left\">\n                                                                                                                                        <div class=\"editor-img as--rounded\">\n                                    <picture>\n                                        <img decoding=\"async\" src=\"https:\/\/www.cnr.tm.fr\/app\/uploads\/2025\/12\/CNR_gestion_sedimentaire-450x450.jpg\" alt=\"\">\n                                    <\/picture>\n                                <\/div>\n                                                                                                                                    <\/div>\n                            <div class=\"as--column__item editor-wysiwyg h-align-left\">\n                                                                                                        <p>In this framework, a <strong>sediment management operation is carried out every 3 or 4 years<\/strong>. The aim of this operation consists in getting up to 1.5 million m<sup>3 <\/sup>of sediments to transit gradually to the sea in order <strong>to avoid the risk of flooding in certain districts of Geneva<\/strong>.<\/p>\n<p>This operation entails considerable environmental challenges: sediments are essential materials for maintaining the sedimentary balance of the river. The possible impact of the operation on the fauna and flora as well as on the quality of the water must also be measured and controlled.<\/p>\n<p>Each operation lasts on average about ten days and <strong>requires nearly 400 CNR employees<\/strong> to limit this impact and ensure efficient sediment management.<\/p>\n\n                                                                                                                                                    <div class=\"buttons-group h-mt-40\">\n                                                                                    <a href=\"https:\/\/www.cnr.tm.fr\/en\/grand-projet\/gestion-sedimentaire-franco-suisse-du-haut-rhone-2025\/\" class=\"a-button no-external-style as--color-4\" target=\"\">Know more about French-Swiss sediment management on the Upper Rhone <\/a>\n                                                                            <\/div>\n                                                                                                                                                                    <\/div>\n                    <\/div>\n    <\/div>\n<\/section>","protected":false},"excerpt":{"rendered":"","protected":false},"author":13,"featured_media":0,"parent":38280,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-38410","page","type-page","status-publish","hentry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Environnement &amp; D\u00e9veloppement durable | CNR<\/title>\n<meta name=\"description\" content=\"D\u00e9couvrez les actions environnementales de CNR pour pr\u00e9server la biodiversit\u00e9, g\u00e9rer la ressource en eau et accompagner la transition \u00e9cologique.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" 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