[1]LI Xiaoli,AO Tianqi,LI Xiaodong.Study on Estimating Method of Agricultural Non-point Source Pollution Based on Export Coefficient Theory[J].Research of Soil and Water Conservation,2016,23(05):327-331.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
23
Number of periods:
2016 05
Page number:
327-331
Column:
Public date:
2016-10-28
- Title:
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Study on Estimating Method of Agricultural Non-point Source Pollution Based on Export Coefficient Theory
- Author(s):
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LI Xiaoli1, AO Tianqi1,2, LI Xiaodong1
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1. College of Water Resource & Hydropower, Sichuan University, Chengdu 610065, China;
2. State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China
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- Keywords:
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agricultural non-point source pollution; export coefficient model; TN load and TP load; comprehensive evaluation; Gulin River Basin
- CLC:
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X52
- DOI:
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- Abstract:
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In order to accurately calculate export loads of agricultural non-point source from Gulin River within the territory of Gulin County, TN and TP export loads for farmland surface runoff pollution, livestock pollution and pollution of agricultural population were determined. Based on export coefficient model, we comprehensively evaluated agricultural non-point source pollution of study area by using three kinds of pollution sources and two kinds of pollutants, and drew the following conclusions. The total pollution load from agricultural non-point pollution source was 4 051.14 t/a. The loads of TN and TP were 3 738.50 t/a and 312.64 t/a. From the perspective of the pollution source, the total standard pollution load rates of farmland surface runoff, livestock and agricultural population were 16.57%, 37.97%, 45.45%, respectively. From the perspective of the pollutants, the total standard pollution load ratio of TN and TP were 70.51% and 29.49%, respectively. The results showed that rural resident living sewage and livestock pollution were the most main pollution sources. TN load was much greater than TP load so that TN load was the most main pollutant. With respect to the situation of water pollution, the agricultural non-point source pollution prevention and control measures were put forward.