水䶄（学名：Arvicola terrestris）为仓鼠科水䶄属的动物。在中国大陆，分布于新疆等地，多栖息于河湖岸、沼泽、灌丛、耕地。该物种的模式产地在瑞典。

The European water vole or northern water vole, Arvicola amphibius (formerly A. terrestris), is a semi-aquatic rodent. It is often informally called the water rat, although it only superficially resembles a true rat. Water voles have rounder noses than rats, deep brown fur, chubby faces and short fuzzy ears; unlike rats their tails, paws and ears are covered with hair.