{"id":44410,"date":"2024-10-23T16:44:04","date_gmt":"2024-10-23T14:44:04","guid":{"rendered":"https:\/\/foretnature.be\/?post_type=article-foret-nature&#038;p=44410"},"modified":"2024-10-23T16:44:04","modified_gmt":"2024-10-23T14:44:04","slug":"la-problematique-chablis-sy-preparer-et-gerer-la-crise-1ere-partie","status":"publish","type":"article-foret-nature","link":"https:\/\/foretnature.be\/en\/article-foret-nature\/la-problematique-chablis-sy-preparer-et-gerer-la-crise-1ere-partie\/","title":{"rendered":"La probl\u00e9matique chablis, s\u2019y pr\u00e9parer et g\u00e9rer la crise ! (1\u00e8re partie)"},"content":{"rendered":"<p>Depuis les temp\u00eates de 1990, la R\u00e9gion wallonne n\u2019a plus \u00e9t\u00e9 confront\u00e9e, \u00e0 grande \u00e9chelle, \u00e0 de violents \u00e9v\u00e9nements climatiques. Il peut d\u00e8s lors para\u00eetre \u00e9tonnant de voir un article se pencher sur la question. Bien au contraire, nous disent les auteurs, \u00e9tant donn\u00e9 l\u2019importance des d\u00e9g\u00e2ts caus\u00e9s en Europe ces derni\u00e8res ann\u00e9es et la fr\u00e9quence de ces \u00e9v\u00e9nements (temp\u00eates en France en 1999 et en Su\u00e8de en 2005), nous ne sommes pas \u00e0 l\u2019abri d\u2019une nouvelle catastrophe dans les ann\u00e9es \u00e0 venir. La d\u00e9marche entreprise consiste donc \u00e0 se pencher sur la probl\u00e9matique chablis, non pas dans le stress et la pr\u00e9cipitation des situations d\u2019apr\u00e8s temp\u00eates, mais sur base d\u2019enseignements tir\u00e9s des exp\u00e9riences pass\u00e9es. Quelques facteurs de sensibilit\u00e9 des peuplements sont d\u2019abord rappel\u00e9s : intensit\u00e9 du vent : \u00e0 partir de 140 km\/h, les taux de d\u00e9g\u00e2ts augmentent tr\u00e8s fortement ; fortes pr\u00e9cipitations : elles engorgent le sol et r\u00e9duisent l\u2019ancrage des racines ; hauteur des peuplements : plus la hauteur dominante d\u2019un peuplement est \u00e9lev\u00e9e, plus le risque de chablis est important ; ad\u00e9quation de l\u2019essence \u00e0 la station : l\u2019adaptation de l\u2019essence \u00e0 la station est primordiale dans la stabilit\u00e9 des arbres. Quelques pratiques sylvicoles peuvent att\u00e9nuer ces facteurs : les types d\u2019\u00e9claircies : les \u00e9claircies fortes d\u00e9stabilisent les peuplements tandis que des \u00e9claircies fr\u00e9quentes et mod\u00e9r\u00e9es permettent de maintenir le couvert le plus ferm\u00e9 possible en conservant la stabilit\u00e9 du peuplement ; les mises \u00e0 blanc : elles cr\u00e9ent une perte de l\u2019effet de masse et font intervenir l\u2019effet de lisi\u00e8re, les arbres de bordure se trouvent brusquement soumis au vent ; le terme d\u2019exploitabilit\u00e9 : il ne faut pas le retarder, plus les arbres sont vieux et hauts plus ils sont sensibles au vent. Ces diff\u00e9rentes actions de pr\u00e9vention ne porteront parfois leurs fruits que beaucoup plus tard et n\u2019emp\u00eacheront pas totalement les temp\u00eates de faire des d\u00e9g\u00e2ts. C\u2019est pourquoi il faut se tenir pr\u00eat \u00e0 r\u00e9agir d\u00e8s le lendemain de ces catastrophes afin de g\u00e9rer la crise et de reconstituer les for\u00eats d\u00e9truites.<\/p>","protected":false},"excerpt":{"rendered":"<p>Depuis les temp\u00eates de 1990, la R\u00e9gion wallonne n\u2019a plus \u00e9t\u00e9 confront\u00e9e, \u00e0 grande \u00e9chelle, \u00e0 de violents \u00e9v\u00e9nements climatiques. Il peut d\u00e8s lors para\u00eetre \u00e9tonnant de voir un article se pencher sur la question. Bien au contraire, nous disent les auteurs, \u00e9tant donn\u00e9 l\u2019importance des d\u00e9g\u00e2ts caus\u00e9s en Europe ces derni\u00e8res ann\u00e9es et la [&hellip;]<\/p>","protected":false},"featured_media":0,"template":"","categories":[49],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>La probl\u00e9matique chablis, s\u2019y pr\u00e9parer et g\u00e9rer la crise ! 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