海河流域农业面源污染潜在风险识别方法

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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.

Key words： agricultural non-point source pollution index system potential risk identification Haihe River Basin

Received: 25 February 2021

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X522

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	Articles by authors
	YANG Jin-feng
	FENG Ai-ping
	WANG Xue-lei
	Li Xin-rong
	WANG Chang-zuo
	TIAN Zhuang

Cite this article:

YANG Jin-feng,FENG Ai-ping,WANG Xue-lei等. An identification method of potential risk for agricultural non-point source pollution in the Haihe River Basin[J]. CHINA ENVIRONMENTAL SCIENCECE, 2021, 41(10): 4782-4791.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2021/V41/I10/4782

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