摘要
基于WASP7.3模型,分别采用解析公式法和模型试错法计算兰江流域COD和氨氮的水体纳污能力。结果表明,90%水文保证率下,研究区基于解析公式法的COD和氨氮总纳污能力分别为10616.9 t.a-1和157.6 t.a-1,基于模型试错法的COD和氨氮总纳污能力分别为11208.3 t.a-1和184.7 t.a-1。解析公式法和模型试错法计算所得各河流COD和氨氮纳污能力大小顺序完全一致,COD纳污能力大小依次为:梅溪>兰江>衢江>金华江>甘溪>赤溪>游埠溪;氨氮纳污能力大小依次为:梅溪>兰江>金华江>衢江>甘溪>赤溪>游埠溪。
The capacities to assimilate COD and ammonia nitrogen were studied using two methods based on WASP7.3 model,the first is empirical foumulas method and the second is trial-and-error method.The total COD and ammonia nitrogen assimilative capacity of Lan River watershed is 10616.9 t·a-1 and 157.6 t·a-1 respectively under 90% confidence instream flow condition based on the empirical foumulas method,and it decreased in the following order: Mein River Segment>Lan Segment>Jinhua Segment>Gan River Segment>Chi River Segment>Youbu River Segment.The total COD and ammonia nitrogen assimilative capacity of Lan River watershed is 11208.3 t·a-1 and 184.7 t·a-1 respectively under 90% confidence instream flow condition based on the trial-and-error method,and it's decreased order is the same to the empirical foumulas method.
出处
《环境与发展》
2011年第10期30-33,36,共5页
Environment & Development
