关键词: 滇池流域, 河流, 降雨径流, 资源化利用

Abstract: Based on the results of land treatment demonstration project which were conducted in Kunming and Chuxiong cities of Yunan province at various periods,the removal rates of BOD₅, COD_Cr,TP,KN,NH_3-N and suspended solid (SS) by using Slow Rate land treatment (SR) system for municipal wastewater was 84.3%,82.5%,94.9%,85.8%,89.4% and 58.4%,respectively.The core skills for ensuring steady operation of this ecological project all the year round are the stabilities of effluent quality and quantity.The main factors relating to stabilities of both include water regulation system in seasons when no water required for crop growth (harvesting and seeding),the treatment techniques relating to rainy season steady operation in and high removal rates,environmental factors such as weather and soil conditions suitable for slow rate infiltration land treatment (SR) operation, and the effective guarantees of water balance regulation and management.The most important technical guarantees for resources utilization of rainfall runoff are the implementation of sectionalized interception management in catchment areas and hydraulic engineering which can improve regulation capability of underlying surface drainage in combination with the use of ecological techniques such as slow rate land treatment (SR) for crop irrigation type or wetland for vegetated submerged bed (VSB), etc. As pollutants from outside sources were not effectively controlled in Dianchi lake catchment water pollution control,the most important approach to control river pollution is to reduce water quantity of surface runoff entering river in rainy season and water quality improvement,to make use of treated wastewater of rain water and rainfall runoff as a resource,and to make the renovated clean water enter into planned specific rivers or drainage channels to supplement eco-water use of Dianchi Lake.

Key words: Dianchi lake watershed, river, rainfall runoff, resources utilization