{"id":164008,"date":"2026-09-04T09:00:00","date_gmt":"2026-09-04T07:00:00","guid":{"rendered":"https:\/\/www.immo-invest.ch\/?p=164008"},"modified":"2026-08-31T11:36:11","modified_gmt":"2026-08-31T09:36:11","slug":"zehn-jahre-die-das-limmattal-veraendern","status":"publish","type":"post","link":"https:\/\/www.immo-invest.ch\/fr\/zehn-jahre-die-das-limmattal-veraendern\/","title":{"rendered":"Dix ann\u00e9es qui ont transform\u00e9 la vall\u00e9e de la Limmat"},"content":{"rendered":"\n\n<p class=\"wp-block-paragraph\">Les laboratoires en conditions r\u00e9elles ne fournissent pas de th\u00e9orie. Ils testent des solutions l\u00e0 o\u00f9 elles devront ensuite \u00eatre mises en \u0153uvre. Le Blue Nexus Lab, ou BlueX, est pr\u00e9vu pour une dur\u00e9e de dix ans et intervient directement au sein des communes. L&rsquo;Eawag apporte son exp\u00e9rience acquise \u00e0 Fehraltorf, o\u00f9 un laboratoire similaire est en place depuis 2016. L\u00e0-bas, un r\u00e9seau de mesure dense a d\u00e9montr\u00e9 que des donn\u00e9es fiables permettent d&rsquo;\u00e9viter des investissements co\u00fbteux mais inadapt\u00e9s.<br><br><strong>La \u00ab ville-\u00e9ponge \u00bb comme solution<\/strong><br>Le principe de base est aussi simple qu\u2019efficace : ne pas \u00e9vacuer imm\u00e9diatement les eaux de pluie vers les \u00e9gouts, mais les stocker sur place, les laisser s\u2019infiltrer ou les rejeter de mani\u00e8re diff\u00e9r\u00e9e. Limeco a d\u00e9j\u00e0 \u00e9valu\u00e9 ce potentiel. Une mise en \u0153uvre compl\u00e8te des mesures de la \u00ab ville-\u00e9ponge \u00bb pourrait r\u00e9duire jusqu\u2019\u00e0 90 % les rejets d\u2019eaux mixtes dans les cours d\u2019eau. M\u00eame selon une estimation prudente, une r\u00e9duction de moiti\u00e9 constituerait d\u00e9j\u00e0 une avanc\u00e9e majeure.<br><br><strong>Moins d\u2019eau, moins d\u2019\u00e9nergie<\/strong><br>Ce qui est bon pour l\u2019environnement soulage \u00e9galement les infrastructures. Moins d\u2019eau de pluie dans le r\u00e9seau d\u2019assainissement signifie moins d\u2019effort de pompage et une moindre consommation d\u2019\u00e9nergie dans la station d\u2019\u00e9puration. Actuellement, environ un tiers des eaux \u00e9trang\u00e8res provient des eaux pluviales. Les mesures de la \u00ab ville-\u00e9ponge \u00bb interviennent pr\u00e9cis\u00e9ment \u00e0 ce niveau et permettent de r\u00e9duire la taille et le co\u00fbt de la nouvelle station d&rsquo;\u00e9puration, dont la construction est pr\u00e9vue d&rsquo;ici 2050.<br><br><strong>La coordination, un \u00e9l\u00e9ment cl\u00e9<\/strong><br>Neuf villes et communes du bassin versant de Limeco se joignent \u00e0 l\u2019initiative. Limeco prend en charge les travaux pr\u00e9paratoires qui, s\u2019ils \u00e9taient r\u00e9alis\u00e9s par chaque commune individuellement, prendraient des ann\u00e9es. Deux fois par an, tous les acteurs concern\u00e9s \u00e9changent leurs points de vue. BlueX met en place le cadre organisationnel permettant de relier directement la recherche et la pratique.<br><br><strong>Un projet phare au rayonnement national<\/strong><br>Ce qui se d\u00e9veloppe dans la vall\u00e9e de la Limmat ne reste pas confin\u00e9 \u00e0 la vall\u00e9e de la Limmat. Les enseignements tir\u00e9s de BlueX doivent \u00eatre exploitables dans toute la Suisse, par les communes, les urbanistes et les d\u00e9cideurs confront\u00e9s aux m\u00eames enjeux. Des lieux de vie plus frais, moins d\u2019inondations, davantage d\u2019espaces verts. La recherche poursuit un objectif concret. La vall\u00e9e de la Limmat montre que l\u2019adaptation au changement climatique n\u2019est pas un v\u0153u pieux, mais une question de planification.<br><br>Texte : Christoph Gr\u00fcninger \u2022 Photo : Limeco<\/p>\n\n","protected":false},"excerpt":{"rendered":"<p>Les rues sont inond\u00e9es, l\u2019asphalte est br\u00fblant, le r\u00e9seau d\u2019assainissement est \u00e0 saturation. Ce qui ressemble \u00e0 une situation d\u2019urgence devient la norme si rien n\u2019est fait. L&rsquo;institut de recherche sur l&rsquo;eau Eawag et le syndicat intercommunal de traitement des eaux us\u00e9es Limeco mettent en place ensemble un laboratoire en conditions r\u00e9elles destin\u00e9 \u00e0 montrer comment une r\u00e9gion enti\u00e8re peut devenir plus r\u00e9siliente face aux ph\u00e9nom\u00e8nes climatiques extr\u00eames. La vall\u00e9e de la Limmat devient ainsi un site d&rsquo;exp\u00e9rimentation et un mod\u00e8le \u00e0 suivre. <\/p>\n","protected":false},"author":57,"featured_media":164009,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_surecart_dashboard_logo_width":"180px","_surecart_dashboard_show_logo":true,"_surecart_dashboard_navigation_orders":true,"_surecart_dashboard_navigation_invoices":true,"_surecart_dashboard_navigation_subscriptions":true,"_surecart_dashboard_navigation_downloads":true,"_surecart_dashboard_navigation_billing":true,"_surecart_dashboard_navigation_account":true,"inline_featured_image":false,"_monsterinsights_skip_tracking":false,"footnotes":""},"categories":[22699,8747,56027],"tags":[872,3931,3155,44617,2002,61546,61547,5141],"class_list":["post-164008","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-durabilite","category-energie","category-planification-developpement","tag-immoinvest-fr","tag-immonews-fr","tag-infrastruktur-fr","tag-klimaanpassung-fr","tag-news-fr","tag-reallabor","tag-regenwassermanagement","tag-schwammstadt-fr"],"acf":{"bild_mit_ki_erstellt_worden":"","lead":"Die Strassen stehen unter Wasser, der Asphalt gl\u00fcht, die Kanalisation ist am Limit. Was nach Ausnahmezustand klingt, wird zur Normalit\u00e4t,  wenn nichts passiert. Das Wasserforschungsinstitut Eawag und der Abwasserverband Limeco bauen gemeinsam ein Reallabor auf, das zeigen soll, wie eine ganze Region widerstandsf\u00e4higer gegen Klimaextreme wird. Das Limmattal wird zur Versuchsanordnung und zum Vorbild. ","autor":"","ort":"","bildunterschrift":"","zusammenfassung":"","bild_im_grid":false,"gallerie":"","newsim":""},"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"description\" content=\"Les rues sont inond\u00e9es, l\u2019asphalte est br\u00fblant, le r\u00e9seau d\u2019assainissement est \u00e0 saturation. Ce qui ressemble \u00e0 une situation d\u2019urgence devient la norme si rien n\u2019est fait. L&#039;institut de recherche sur l&#039;eau Eawag et le syndicat intercommunal de traitement des eaux us\u00e9es Limeco mettent en place ensemble un laboratoire en conditions r\u00e9elles destin\u00e9 \u00e0 montrer comment une r\u00e9gion enti\u00e8re peut devenir plus r\u00e9siliente face aux ph\u00e9nom\u00e8nes climatiques extr\u00eames. 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