Loss coefficient of nitrogenous non-point source pollution under various precipitation conditions

作     者：Hongguang CHENG Fanghua HAO Xiyan REN Shengtian YANG Wen XIONG Shaoping LEI 

作者机构：School of EnvironmentBeijing Normal UniversityState Key Laboratory of Water Environment SimulationBeijing 100875China The Water Resources Protection Scientific Research Institute of the Yangtze RiverWuhan 430051China 

出 版 物：《Frontiers of Environmental Science & Engineering》 (环境科学与工程前沿（英文）)

年 卷 期：2008年第2卷第2期

页      面：230-235页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 08[工学] 0815[工学-水利工程] 

基　　金：This work was supported by the National Natural Science Foundation of China(Grant No.40771191) 

主　　题：non-point source pollution land uses loss coefficient Heihe River Basin 

摘      要：In this study,calibrations of non-point source(NPS)pollution models are performed based on Black River basin historical real-time runoff data,sedimentation record data,and NPS sources survey *** concept of NPS loss coefficient for the watershed or the loss coefficients(LC)for simplicity is brought up by examining NPS build-up and migration processes along riverbanks in natural river *** historical data is used for determining the nitrogenous NPS loss coefficient for five land use types including farmland,urban land,grassland,shrub land,and forest under different precipitation *** comparison of outputs from Soil and Water Assessment Tool(SWAT)model and coefficient export method showed that both methods could obtain reasonable *** high Pearson correlation coefficient(0.94722)between those two sets of calculation results justified the consistency of those two *** result in the study is that different combinations of precipitation condition and land use types could significantly affect the calculated loss *** for the adsorptive nitrogen,the order of impact on LC for different land use types can be sorted as:farm *** *** *** while the order was *** *** *** land for soluble nitrogen.