排水口渗水回流治理滇池的构想

Idea of Dianchi Lake Cleaning with Distilled Groundwater Back-up at Drain Outlet

在滇池排水口附近修建地下水渗水取水设施,大量开采地下渗水,通过回水泵站将渗水输送至回水通道,经回流通道进入上游回水口。工程投资约24.96亿元,运行费用约4 766.5万元/a,每年可为滇池提供6.72亿m^(3)生态用水。与跨流域调水相比回水泵站的扬程更低,回水通道的线路更短,投资和运行费用要小得多,但可以加大污染物离开滇池的速率、增加滇池生态用水量、提高滇池水体自净能力,改善滇池水质,从而促进昆明社会经济健康高效发展。

Building of distilled groundwater collection facilities near the drain outlet of Dianchi Lake make considerable distilled groundwater tapped, and the water is pumped to backwater passage to upstream outlet. The project with an investment of 249.6 thousand yuan and operating cost of about 47,665 thousand yuan per year supplies water of 672 million cubic meters for the biology of Dianchi Lake. Compared with water delivery from other basins, water pumping requires lower hydraulic head, shorter water passage and lower investment and operating cost. But it makes more efficient cleaning, more biological water and helps the Lake more capable of self-cleaning to improve its water quality, so as to promote healthy and efficient social and economic development of Kunming.