基于SWMM的滇池环湖截污干渠系统运行效能分析

滇池环湖截污干渠工程是滇池环湖截污体系的重要组成部分,利用SWMM模型对滇池环湖截污干渠系统运行情况进行模拟,并对其运行效能进行分析。分析结果表明:典型降雨年景(降雨保证率分别为29.7%、93.8%和82.8%)下滇池环湖截污干渠对现状汇水范围内全年产生的污水收集率为29.52%~51.68%,对设计服务范围内产生的污水收集处理率为46.3%~67.9%。环湖截污干渠系统旱季收集处理效率明显高于雨季,各截污片区收集处理率存在明显差异。当重现期≤0.2年时环湖截污系统现状汇水范围内产生的污水及地表径流均能够被收集与处理;当重现期≤0.25年时环湖截污系统设计服务范围内产生的污水及地表径流能够完全被收集与处理。

ANALYSIS OF THE OPERATION EFFICIENCY OF INTERCEPTION TRUNK OF DIANCHI LAKE BASED ON SWMM

The interception trunk is an important part of the sewage interception system of Dianchi Lake.The operation efficiency of the interception trunk is assessed by Storm Water Managemant Model (SWMM).The results show that in the typical years (rainfall insurance rate is 29.7％ 、93.8％ and 82.8％,respectively),the collection rate of the waste water in the whole catchment is in a range from 29.52％ to 51.68％,the collection rate of the waste water in the design scope is in a range from 46.3％ to 67.9％.The waste water collection rate in dry season is higher than that in rainy season and it has obvious differences in different areas.All the waste water and runoff in the whole catchment and in the design scope can be collected as the design rainfall corresponding to 0.2-year return period and 0.25-year return period,respectively.