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| Analysis on spatio-temporal characteristics of agricultural non-point sources pollution and pollution risk in Jiangxi Province, China |
| Received:January 26, 2018 |
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| KeyWord:nonpoint source pollution;spatial-temporal characteristics;pollution risk;Jiangxi Province |
| Author Name | Affiliation | E-mail | | XIONG Zhao-zhao | College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China | | | WANG Shu-yue | College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China | | | TONG Yu | College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China | | | CHENG Li-hua | College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China | chenglihua@zju.edu.cn | | XU Xin-hua | College of Environmental & Resource Sciences, Zhejiang University, Hangzhou 310058, China | |
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| Abstract: |
| To determine the key control areas of rural drinking water sources in Jiangxi Province, the agricultural non-point sources pollution (ANPSP) risk, which based on the distribution of pollution load and intensity of chemical oxygen demand (COD), total nitrogen (TN) and total phosphorus (TP) in 11 cities, was analyzed by the emission coefficient method and Statistical Yearbook of Jiangxi Province during 2011 to 2015. Combined with ArcGIS to characterize the spatial distribution of COD, TN, TP pollution load and pollution intensity, the method of dispersion standardization was used to analyze the sequence of the pollution risk. The results showed that the total load of COD, TN and TP in ANPSP of Jiangxi Province in 2015 were 455.3, 168.7 and 58.8 kt·a-1 respectively. The total load of COD, TN and TP in 2011-2015 showed a slight decreasing trend year by year. The main contribution sequence of rural non-point source pollution in Jiangxi Province was:rural life > livestock and poultry breeding > crop farming > aquaculture. The spatial analysis showed the similar distribution characteristics of pollution load and pollution intensity in different pollutants, and showed different distribution characteristics of pollution load and pollution intensity in single pollutant. The pollution load of single pollutant was higher in the west and lower in the east of Jiangxi Province, and the pollution intensity of single pollutant was higher in the middle and lower around. The pollution risk sequence of ANPSP in the 11 cities was Nanchang > Pingxiang > Yingtan > Yichun > Xinyu > Fuzhou > Shangrao > Ganzhou > Jiujiang > Jingdezhen > Ji'an. |
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