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    <ows:Abstract>Dans le cadre du programme de cartographie départementale de l’aléa retrait-gonflement des argiles conduit par le BRGM, la donnée de départ utilisée est celle des cartes géologiques établies et publiées par le BRGM à l’échelle 1/50 000. Leur analyse a permis d’identifier les formations argileuses (au sens large), affleurantes ou sub-affleurantes, et d’en établir une cartographique numérique, homogène à l’échelle départementale.

Depuis le 1er juillet 2026, en application de la mesure 5 du troisième Plan national d'adaptation au changement climatique (PNACC), l'arrêté du 9 janvier 2026 se substitue à la carte d'exposition au Retrait-Gonflement des Argiles (RGA) de 2020 afin de tenir compte de la forte sinistralité observée ces dernières années. Conformément à la loi Élan, ces zones sont soumises à des prescriptions constructives adaptées : le vendeur d'un terrain constructible doit faire réaliser une étude géotechnique préalable, et le maître d'ouvrage doit appliquer soit les techniques constructives définies réglementairement, soit celles issues de l'étude géotechnique de conception lorsqu'elle existe. Le nouveau zonage s'applique aux ventes et aux contrats de construction conclus à compter du 1er juillet 2026.</ows:Abstract>
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      <Title>ALEA   Couche de l'alea retrait gonflement des argiles en Lorraine  a partir du 1er juillet 2026 </Title>
      <Abstract>Dans le cadre du programme de cartographie departementale de l alea retrait gonflement des argiles conduit par le BRGM  la donnee de depart utilisee est celle des cartes geologiques etablies et publiees par le BRGM a l echelle 1 50 000  Leur analyse a permis d identifier les formations argileuses  au sens large   affleurantes ou sub affleurantes  et d en etablir une cartographique numerique  homogene a l echelle departementale   Depuis le 1er juillet 2026  en application de la mesure 5 du troisieme Plan national d'adaptation au changement climatique  PNACC   l'arrete du 9 janvier 2026 se substitue a la carte d'exposition au Retrait Gonflement des Argiles  RGA  de 2020 afin de tenir compte de la forte sinistralite observee ces dernieres annees  Conformement a la loi Elan  ces zones sont soumises a des prescriptions constructives adaptees   le vendeur d'un terrain constructible doit faire realiser une etude geotechnique prealable  et le maitre d'ouvrage doit appliquer soit les techniques constructives definies reglementairement  soit celles issues de l'etude geotechnique de conception lorsqu'elle existe  Le nouveau zonage s'applique aux ventes et aux contrats de construction conclus a compter du 1er juillet 2026 </Abstract>
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