Alimentée par le ru du Moulin, la Claire Douve est creusée, au début du 19e siècle, de Saint-Jean-le-Thomas à Genêts pour drainer des terres agricoles[1]. Elle donne son nom au marais environnant.
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Notes et références
↑ 1,0 et 1,1« Saint-Jean-le-Thomas : les zones humides débordent », Ouest-France, 7 janvier 2021.