基于水文水质资料的非点源输出系数模型参数确定方法及其应用  

METHOD FOR OBTAINING PARAMETERS OF EXPORT COEFFICIENT MODEL USING HYDROLOGY AND WATER QUALITY DATA AND ITS APPLICATION

作　　者：丁晓雯[1] 刘瑞民[1] 沈珍瑶[1] 

机构地区：[1]北京师范大学环境学院环境模拟与污染控制国家重点实验室,北京100875

出　　处：《北京师范大学学报（自然科学版）》2006年第5期534-538,共5页Journal of Beijing Normal University(Natural Science)

基　　金：国家"九七三"课题资助项目(2003CB415204);教育部博士点基金资助项目(20050027014)

摘　　要：非点源污染模型是目前开展非点源污染研究的主要手段.针对非点源污染模型中的输出系数模型,提出了一种基于历史水文水质资料的参数确定方法.该方法通过在研究区中筛选若干个小流域,根据污染物质量守恒原则,得到各营养源的输出系数.该方法对长江上游2000年的总氮(TN)负荷模拟值为156.19万t,其与实际监测值的相对误差为21.90%,这对于长江上游这样的超大流域而言,模拟精度在可接受范围内.本文提出的参数确定方法简便可行,对参数要求低,且精度较好,适合于对我国非点源污染监测资料缺乏地区以及大中尺度流域的非点源污染负荷研究,因此具有其理论和现实意义.Non-point source （NPS） model is a key approach for the research on NPS pollution load. A method for obtaining parameters of export coefficient model by using hydrology and water quality data is presented. In this method, several sub-watersheds in study area are selected, and the export coefficients of various nutrition sources can be obtained according to the principle of pollutant conservation. And using this method, the TN pollution load in upper reach of Yangtze River Basin in 2000 year is also calculated as 1.56 × 10^6 t. The result indicates that the simulated value is consistent with the inspective one and the relative error is 21.90%, so the simulated result is reliable basically. The method put forward in this paper is convenient, feasible, precision and with less parameter demand. It is suitable for studies in our country where NPS pollution monitor data are scarce. Furthermore, for NPS pollutant researches of large scale basin, this method also has its theoretical and practical significance.

关 键 词：非点源污染 输出系数模型 长江上游 总氮负荷 

分 类 号：X832[环境科学与工程—环境工程]