An identification method of potential risk for agricultural non-point source pollution in the Haihe River Basin
YANG Jin-feng1, FENG Ai-ping2, WANG Xue-lei2, Li Xin-rong1, WANG Chang-zuo2, TIAN Zhuang1
1. Beijing Academy of Agriculture and Forestry Sciences, Institute of Plant Nutrition and Resources, Beijing 100097, China; 2. Ministry of Ecology and Environment Center for Satellite Application on Ecology and Environment, Beijing 100094, China
Abstract:Based on a comprehensive analysis of the source and sink factors of agricultural non-point source pollution risk, eight main factors leading to the agricultural non-point source pollution, which were annual precipitation, dissolved non-point source pollutant inflow coefficient, granular non-point source pollutant inflow coefficient, annual vegetation coverage, slope, soil erodibility factor, nitrogen and phosphorus balance of farmland, were identified. Moreover, an identification index system of the potential risk for agricultural non-point source pollution was established. The multi-factor comprehensive analysis method was used to evaluate the risk of agricultural non-point source pollution in the Haihe River Basin. The results were compared with the risk identification results of Diffuse pollution estimation with remote sensing (DPeRS) model using deviation analysis. It showed that 61.91% of the Haihe River Basin had potential risks of agricultural non-point source pollution. It was concentrated in the central and southern regions of the basin. Among which were high-risk areas including the southeast of Beijing, the central part of Tianjin, the northeastern part of Shandong and the southern part of the Henan within the basin. Comparing the results with that of DPeRS model, the area of the same risk level regions differed by no more than 12%, and the area of high-risk regions differed by only 0.12%, and there were little or no deviation for more than 97.17% of the regions. It was shown that the identification method had the same accuracy as the DPeRS model method for identifying potential risks of agricultural non-point source pollution, making rapid and efficient identification of potential risks of regional agricultural non-point source pollution possible.
杨金凤, 冯爱萍, 王雪蕾, 李新荣, 王昌佐, 田壮. 海河流域农业面源污染潜在风险识别方法[J]. 中国环境科学, 2021, 41(10): 4782-4791.
YANG Jin-feng, FENG Ai-ping, WANG Xue-lei, Li Xin-rong, WANG Chang-zuo, TIAN Zhuang. An identification method of potential risk for agricultural non-point source pollution in the Haihe River Basin. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(10): 4782-4791.
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