人水争地——滇池水域变迁的主要历史动因

人与水对土地的争夺是滇池水域发生变迁的主要历史动因。自元代开始,人类疏浚滇池出水口,围海造田,降低水位,获取大量农业用地;筑堤建坝,填湖建房,不断扩展城市建设用地。同时,滇池也在极力与人争夺土地,使滇池周边时而为农田,时而为水域;使昆明城不时受到水患的侵扰。在人水争地的过程中,滇池水域面积显著缩减。

"Human's Fight for Land with Water Area"——A Main Factor in the History of Changes in Water Area of the Dianchi Lake

Historically, people fought for land with water area by reclaiming land from the Dianchi Lake, which was viewed as a main factor in the changes in water area of the lake. Since Yuan Dynasty, in order to obtain arable land and urban land, people worked hard on the Dianchi Lake, dredging its water mouth, building dykes and dams, reclaiming land from the lake. At the same time, the Dianchi Lake struggled with human to remain its water area, which sometimes changed the area around the lake into arable fields and sometimes into water areas. Under the circumstances, the Kunming City often suffered form the disasters caused by the lake. During the process, the water area of the Diachi Lake was reduced obvously.