基于输出系数法的陕西农业面源污染负荷研究

doi:10.19741/j.issn.1673-4831.2022.1191

Abstract

Abstract: In order to more accurately evaluate the current situation of agricultural non-point source pollution in Shaanxi Province, the total nitrogen (TN) and total phosphorus (TP) load of agricultural non-point source pollution were estimated by using the output coefficient method. The results show that, in 2020, the TN and TP load of agricultural non-point source pollutants in Shaanxi Province were 38 835.9 t and 9 150.1 t, respectively. The difference in the spatial distribution of the cities is influencial to the load amount and load intensity of TN and TP. The TN and TP load amounts were relatively high in the cities of Ankang, Hanzhong and Yulin, while the TN and TP load intensities were relatively high in the cities of Xi'an, Xianyang, and Weinan. Different types of pollution sources contributed differently to TN and TP loads. A large proportion of TN and TP came from rural domestic pollution and livestock and poultry breeding pollution. The research results can provide references for the prevention and control of agricultural non-point source pollution in the region and for the promotion of the adjustment and upgrading of the local agricultural structure.

Key words: agricultural non-point source pollution, output coefficient method, load amount, load intensity

CLC Number:

LI Jian-xun, LI Ming-wan, LIU Xiao-yu, YANG Li. Research on Agricultural Non-Point Source Pollution Load in Shaanxi Based on Output Coefficient Method[J]. Journal of Ecology and Rural Environment, 2023, 39(4): 523-529.

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Research on Agricultural Non-Point Source Pollution Load in Shaanxi Based on Output Coefficient Method

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