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Assessing Agricultural Non-Point Source Pollution Load of Nitrogen and Phosphorus in Hangzhou, China


Affiliations
1 College of Public Administration, Zhejiang University, Hangzhou 310058, China
2 College of Public Administration, Zhejiang University of Finance and Economics, Hangzhou 310018, China
 

Agricultural non-point source pollution is important environmental problem in China. In this study, the export coefficient model is applied to assess the agricultural non-point source pollution load of total nitrogen (TN) and total phosphorus (TP) based on the main pollution sources. The results showed that the agricultural non-point source pollution load of TN in Hangzhou was 18166t, and the TN load exported from animal husbandry accounted for the highest share. The agricultural non-point source pollution load of TP was 1668t, and the TP load exported from rural living accounted for the highest share. Then the spatial distribution of TN load and TP load was analysed. It revealed that the minimum TN load and TP load existed in central district in Hangzhou. The maximum TN load and TP load existed in Xiaoshan, Yuhang and Fuyang which surrounded the central district. The TN load and TP load in Chun'an, Jiande and Lin'an had a close relationship with local ecological protection and landforms. This assessment will offer effective support to policy makers for reducing TN load and TP load.

Keywords

Total N Load, Total P Load, Agricultural Pollution, Non-Point Source Pollution.
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  • Assessing Agricultural Non-Point Source Pollution Load of Nitrogen and Phosphorus in Hangzhou, China

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Authors

Ping Shen
College of Public Administration, Zhejiang University, Hangzhou 310058, China
Heyuan You
College of Public Administration, Zhejiang University of Finance and Economics, Hangzhou 310018, China

Abstract


Agricultural non-point source pollution is important environmental problem in China. In this study, the export coefficient model is applied to assess the agricultural non-point source pollution load of total nitrogen (TN) and total phosphorus (TP) based on the main pollution sources. The results showed that the agricultural non-point source pollution load of TN in Hangzhou was 18166t, and the TN load exported from animal husbandry accounted for the highest share. The agricultural non-point source pollution load of TP was 1668t, and the TP load exported from rural living accounted for the highest share. Then the spatial distribution of TN load and TP load was analysed. It revealed that the minimum TN load and TP load existed in central district in Hangzhou. The maximum TN load and TP load existed in Xiaoshan, Yuhang and Fuyang which surrounded the central district. The TN load and TP load in Chun'an, Jiande and Lin'an had a close relationship with local ecological protection and landforms. This assessment will offer effective support to policy makers for reducing TN load and TP load.

Keywords


Total N Load, Total P Load, Agricultural Pollution, Non-Point Source Pollution.

References