Assessing spatiotemporal risks of nonpoint source pollution via soil erosion: a coastal case in the Yellow River Delta, China

作     者：Wang, Youxiao Huang, Chong Liu, Gaohuan Zhao, Zhonghe Li, He Sun, Yingjun 

作者机构：School of Surveying and Geo-Informatics Shandong Jianzhu University Jinan250101 China State Key Laboratory of Resources and Environmental Information System Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing100101 China Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Nanjing210023 China Agricultural Information Institute Chinese Academy of Agricultural Sciences Beijing100081 China 

出 版 物：《Environmental Science and Pollution Research》 (Environ. Sci. Pollut. Res.)

年 卷 期：2024年第31卷第23期

页      面：34569-34587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）] 1201[管理学-管理科学与工程(可授管理学、工学学位)] 08[工学] 0837[工学-安全科学与工程] 0815[工学-水利工程] 0706[理学-大气科学] 0814[工学-土木工程] 0833[工学-城乡规划学] 

基　　金：This research was supported by the Natural Science Foundation of Shandong Province (Grant No. ZR2023QD129)  a grant from State Key Laboratory of Resources and Environmental Information System  the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDA23050101)  and the National Natural Science Foundation of China (Grant No. 42001227) 

主　　题：Erosion 

摘      要：Nonpoint source pollution (NPSP) has always been the dominant threat to regional waters. Based on empirical models of the revised universal soil loss equation and the phosphorus index, an NPSP risk assessment model denoted as SL-NPSRI was developed. The surface soil pollutant loss was estimated by simulating the rain-runoff topographic process, and the influence of path attenuation was quantified. A case study in the Yellow River Delta and corresponding field surveys of soil pollutants and water quality showed that the established model can be applied to evaluate the spatial heterogeneity of NPSP. NPSP usually occurs during high-intensity rainfall periods and in larger estuaries. Summer rainfall increased pollutant transport into the sea from late July to mid-August and caused estuarine dilution. Higher NPSP risks often correspond to coastal areas with lower vegetation coverage, higher soil erodibility, and higher soil pollutant concentrations. Agricultural NPSP originating from cropland significantly increase the pollutant fluxes. Therefore, area-specific land use management and vegetation coverage improvement, and temporal-specific strategies can be explored for NPSP control during source-transport hydrological processes. This research provides a novel insight for coastal NPSP simulations by comprehensively analyzing the soil erosion process and its associated pollutant loss effects, which can be useful for targeted spatiotemporal solutions. Graphical Abstract: (Figure presented.) © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.