The 82.67-square-kilometer Datong Lake at the center of Dongting Lake has been suffering from agricultural and household wastewater pollution, as well as breeding enterprises' blind pursuit of economic benefits in recent years.
位于洞庭湖腹地的大通湖水面82.67平方公里，近年来存在农业面源污染、生活污染和养殖企业盲目追求经济效益等问题。