Caohai,part of Dianchi in Yunnan Province, is heavily polluted by the discharge of urbanwater water,lost its water body function, and thus threatened the water source of Kuming City.

• 草海是滇池的一部分，大量污水排入使草海水体污染日益严重，水体已达重富营养化水平，生态平衡遭受严重破坏，水功能基本丧失。