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            <gco:CharacterString>DONNEES : RESEAU DE SUIVI de la température des eaux souterraines</gco:CharacterString>
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        <gco:CharacterString>Depuis plusieurs années, une augmentation sensible de la température de la nappe est observée sur le territoire de l’Eurométropole de Strasbourg. C’est actuellement sur la nappe d’Alsace le seul secteur avec des études ou un suivi. 
Que se passe-t-il sur le reste de l’aquifère ?
Quelles en sont les causes ?
Les connaissances actuelles ne sont pas suffisantes pour expliquer cette augmentation. Les pistes principales sont l’impact anthropique (PAC) ou le réchauffement climatique.
L’APRONA va donc déployer progressivement un réseau de référence du suivi de la température à l’échelle régionale. Les objectifs de ce réseau de références sont les suivants :
-	Acquérir à l’échelle régionale des chroniques températures régulières, pérennes et représentatives afin d’appréhender les dynamiques thermiques dans la nappe d’Alsace ;
-	Constituer à l’échelle régionale des chroniques de données continues et homogènes pour déterminer sur une longue période des "valeurs caractéristiques" de l’aquifère et détecter, le cas échéant, d'éventuels signes de surexploitation par les pompes à chaleur (PAC) ou déterminer les secteurs où les actions prioritaires sont à engager ;
-	Assurer un suivi de la température sur le long terme afin de détecter les variations inter annuelles de ce paramètre et les signes du réchauffement climatique ;
-	Fournir des données fiables afin de mieux interpréter les échanges nappe / rivières ;
-	Fournir des informations homogènes et fiables à l’échelle régionale, aux usagers (collectivités, administrations, décideurs publics, bureaux d’étude, aménageurs et particuliers) sur l’état de la ressource souterraine.


Le réseau comporte 50 points de mesure au 31/12/2016.</gco:CharacterString>
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