Self-purification capacity of nitrogen and phosphorus of Lake Taihu on the basis of mass balance

Abstract

On the basis of mass balance and the observed data of water quantity and in the flow-in and out rivers of Lake Taihu in 2010,the computation methods of the self-purification capacity of total phosphorus and total nitrogen of Lake Taihu are discussed.The results show that the self-purification ratio of total phosphorus and total nitrogen of Lake Taihu are about 48% and 42%,respectively,with the consideration of nutrients flowing in and out of Lake Taihu.While the self-purification ratio of total phosphorus and total nitrogen of Lake Taihu are about 52% and 49%,respectively,on the basis of mass balance.The merit and demerit of the two methods are figured out and prospected for further research is illustrated.