湖南农业科学Issue(6)：52-58,7.DOI:10.16498/j.cnki.hnnykx.2025.006.009
南湖流域典型支流面源污染负荷时空变化分析与模拟
Analysis and Simulation of Spatio-Temporal Variations of Non-Point Source Pollution Loads in Typical Tributaries of the Nanhu Lake Basin
摘要
Abstract
This study took the basin of Wangjia River,a typical tributary of the Nanhu Lake basin in Yueyang City,Hunan Province,as the research area.On the basis of conducting the monitoring of phosphorus pollutants in the water environment,and further considering the influences of the hydrological environment,topography and landforms,and land use types of the basin,this study constructed and optimized a multi-scale phosphorus source-sink transport model integrating environmental information and spatial remote sensing through MIKE 21 software,and analyzed and simulated the spatio-temporal variations of phosphorus non-point source pollution loads,so as to provide reference for the precise prevention and control of phosphorus pollution in water bodies.The monitoring results showed that the peak period of phosphorus concentration from various pollution sources in Wangjia River from September 2023 to August 2024 was concentrated in winter and spring.The average total phosphorus concentration in the water body of Wangjia River was 0.78 mg/L,and the average total phosphorus concentration in the water body of the catchment area was 0.61 mg/L.Both exceeded the Class V water quality concentration standard in the GB 3838-2002 Surface Water Environmental Quality Standards.In terms of temporal variation,the average total phosphorus concentration in the water bodies of Wangjia River and the catchment area both showed the highest levels in spring and the lowest levels in autumn.In terms of spatial variation,the average total phosphorus concentration in the water body of Wangjia River from the upper reaches to the lower reaches showed a trend of first increasing and then decreasing.The average total phosphorus concentration of the water body in the middle of the catchment area was higher than that on both sides in spring,while the opposite trend occurred in autumn.The average accuracy of the optimized model simulation increased to about 70%,and the trend of the simulation results was basically consistent with that of the measured results.关键词
面源污染/水体总磷/MIKE 21/时空变化/南湖/王家河Key words
non-point source pollution/total phosphorus in the water body/MIKE 21/spatio-temporal variations/Nanhu Lake/Wangjia River分类
资源环境引用本文复制引用
刘康,于鹏跃,孙新平,邹高峰,伍艺,邹韬,黄颖,费讲驰..南湖流域典型支流面源污染负荷时空变化分析与模拟[J].湖南农业科学,2025,(6):52-58,7.基金项目
湖南省自然科学基金重大项目(2021JC0001) （2021JC0001）
