农业环境科学学报2024，Vol.43Issue(12)：2856-2866,11.DOI:10.11654/jaes.2024-0950
基于遥感技术的北方草原型河流面源污染贡献解析
Analysis on the contribution of non-point source pollution of grassland river in northern China based on remote sensing technology
摘要
Abstract
In order to explore the influence of non-point source pollution on grassland river in northern China with small population density and insignificant surface runoff,and to support the objective evaluation of regional water environment quality,this study takes the Shandian River basin as an example,focusing on the unclear sources and contributions of CODCr and CODMn pollution in the Baichengzi section during flood season,on the basis of satellite remote sensing technology,a multiple technical approach was applied that integrated ground monitoring,experimental simulation and model evaluation to analyze the non-point source pollution of water-level fluctuation zone and soil erosion in the study area from 2020 to 2022 comprehensively,and the contribution of non-point source pollution to Baichengzi section water quality was quantitatively analyzed based on the measured data of water quality and the estimated data of river discharge by remote sensing.The results show that the non-point source pollution from water-level fluctuation zone in the study area is characterized by grassland output>feces output>bare soil output.The average contribution rate of non-point source pollution from the water-level fluctuation zone to CODCr and CODMn in Baichengzi section reached 70% from May to September,and the level of non-point source pollution from soil erosion was slight,which average contribution rate was less than 1% .According to the statistic results of natural and human diffuse pollution outputs,the increase of CODCr and CODMn concentration in Baichengzi section from May to September was mainly influenced by natural factors,and the average contribution rate of natural non-point source pollution to water quality in Baichengzi section reached 65% in three years,while the contribution rate of human non-point source pollution was less than 10% .This study effectively evaluate the environmental impact of non-point source pollution in northern grassland river,especially objectively analyze the impact of natural factors and human activities on the unstable water quality,which can provide technical support for the implementation of the objective evaluation of water environmental quality with"monitoring first and flexible assessment".关键词
北方草原型河流/遥感/面源污染贡献/消落带/水土流失Key words
northern grassland river/remote sensing/non-point source pollution contribution/water-level fluctuation zone/soil erosion分类
资源环境引用本文复制引用
黄莉,周澎,王雪蕾,冯爱萍,尹文杰,谢成玉,王玉,陈华杰..基于遥感技术的北方草原型河流面源污染贡献解析[J].农业环境科学学报,2024,43(12):2856-2866,11.基金项目
国家重点研发计划项目(2022YFB3903502)Key Research and Development Program of China(2022YFB3903502) （2022YFB3903502）
