• 论文 •

### 流域非点源污染模拟研究——以滇池流域为例

1. 1. 北京大学环境学院, 北京 100871;
2. 云南省环境科学研究所, 云南昆明 650034
• 收稿日期:2004-11-16 修回日期:2005-01-19 出版日期:2005-08-15 发布日期:2005-08-15
• 通讯作者: 郭怀成(1953-),北京人,教授,博士生导师。从事环境规划与管理研究。
• 作者简介:邢可霞(1977-),女,河南濮阳人,在读博士。主要从事水环境污染模拟,环境规划与管理等方面的 研究。E-mail:xingkexia@pku.org.cn
• 基金资助:

云南省计委攻关计划

### Simulation of non-point source pollution in watershed scale: the case of application in Dianchi Lake Basin

XING Ke-xia1, GUO Huai-cheng1, SUN Yan-feng1, HE Bin2, HUANG Yong-tai2

1. 1. College of Environmental Sciences, Peking University, Beijing 100871, China;
2. Yunnan Institute of Environmental Science, Kunming 650034, China
• Received:2004-11-16 Revised:2005-01-19 Online:2005-08-15 Published:2005-08-15

Abstract:

Watershed water quality management is a process with many steps. Mathematical model plays an important role in watershed management as it can resolve the problem quantificationally and be operated dynamically. HSPF (Hydrological Simulation Program Fortran) developed by USEPA was chosen for the application in this paper. Hydrology and water quality simulation processes in the non-point source pollution model were introduced in the study, in which Dianchi Lake Basin was chosen for the case study. The whole basin was divided into nine sub-basins firstly. Then the non-point source database for the Dianchi Lake Basin was built. Sensitivity analysis revealed that only a few parameters were sensitive to the simulation of runoff and water quality processes. In the paper, the simulation processes for river outflow, SS, BOD, TN and TP were introduced in detail. The simulation processes for Panlongjiang Sub-watershed was given as an example. Parameter values were estimated from watershed properties, previous experimental and modeling studies, regional field studies and literature. Optimization of the parameter values, calibration of the model and validation of the simulation was achieved using stream flow and concentration of pollutants in the river outflow of watershed. The simulation results showed that relative error for runoff simulation in some sub-watersheds was very small. On the whole, the runoff simulation results were good. After that, the total and non-point source pollution loads of SS, BOD, TN and TP in each sub-watershed were calculated using the calibrated model. The results revealed that the main contributors of the non-point source pollution in the Dianchi Lake Basin were SS, TN and TP. From the spatial distribution to the non-point sources, nitrogen pollution mostly came from Panlongjiang, Baoxianghe and Chaidahe sub-watersheds. It could be attributed to the large amount usage of fertilizers in agricultural lands. SS and TP pollution status was serious in Chaidahe sub-watershed and western diffused area. The main reason could be explained as many phosphorite mines were distributed in such areas. High water and soil runoff and phosphorous adsorption had caused high non-point source pollution in total phosphorous.