1[1]U.S.EPA.Nonpoint Pointers,EPA-8410-F-96-004A,USEPA,office of water (4503 F)[M].Washington:U S Government Print Office,1996.
2[3]Gu R H,Dong M.Water quality modeling in the watershed-based approach for waste load allocations[J].Water Science and Technology,1998,38(10):165-172.
