Abstract: With analysis of transport diffusion characteristics of constant and continuous pollutants of reservoir,the analytical solution of one dimensional water quality model equation under simplified conditions in given.Combine with the changing laws of river shape reservoir’s cross section geometric parameter,the BOD 5 concentration distributions of two reservoirs are offered.By comparing the analytical calculation results with the prediction values of one dimensional numerical model of two corresponding reservoirs,it can be found that the BOD 5 concentration distributions along the river are quite identical. 更多