基于SWAT模型对武烈河流域不同水期的水环境治理项目效益分析研究

Research about the benefit analysis of environmental projects based on SWAT model in Wulie river basin at different periods

基于SWAT模型,以武烈河流域为例,研究流域不同类型水环境治理项目在不同水期的环境效益净值,为流域优化管理提供技术支持。结果表明:水环境治理对考核断面水质的改善情况,在不同水期存在一定的差异性。丰水期的COD和氨氮是枯水期的2~16倍,是平水期的1~3倍;平水期的COD和氨氮是枯水期的1~8倍。在枯水期和平水期,城镇生活污染治理项目对雹神庙断面COD和氨氮的改善贡献程度最大;在丰水期,农村面源污染治理项目对雹神庙断面COD和氨氮的改善贡献程度最大。

Based on SWAT model,it was researched about benefit analysis of environmental projects at different periods to provide technical support for basin optimal management taking Wulie river basin for example. The results were showed that the water quality benefits of environmental projects were different in different periods. Overall,the environmental benefits on COD and ammonia nitrogen in wet period was the 2-16 times to the dry season, also was the 1-3 times to the normal wet season^at the same time,the normal wet season was the 1-8 times to the day season for the environmental benefits on COD and ammonia nitrogen. The city pollution control engineering contribution rates on the improvement of the water quality were the greatest in wet season and normal wet season. In wet season, the im- provement of the water quality for the rural no-point source pollution projects was the most obvious.