There are lots of testacean aquatics attached to the underwater concrete surfaces of the spiral casing and draft tube in Shaxikou hydropower station.

• 沙溪口水电站水下蜗壳及尾水管混凝土表面附着较多的贝壳类水生物,水下混凝土侵蚀严重,影响水工建筑物的安全运行。