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

机译：杭州市农业面源氮磷污染负荷估算

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摘要

Agricultural non-point source pollution is important environmental problem in China. In this study, the exportcoefficient 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 agriculturalnon-point source pollution load of TN in Hangzhou was 18166t, and the TN load exported from animalhusbandry accounted for the highest share. The agricultural non-point source pollution load of TP was1668t, and the TP load exported from rural living accounted for the highest share. Then the spatial distributionof TN load and TP load was analysed. It revealed that the minimum TN load and TP load existed in centraldistrict in Hangzhou. The maximum TN load and TP load existed in Xiaoshan, Yuhang and Fuyang whichsurrounded the central district. The TN load and TP load in Chun’an, Jiande and Lin’an had a close relationshipwith local ecological protection and landforms. This assessment will offer effective support to policy makersfor reducing TN load and TP load.
机译：农业面源污染是中国重要的环境问题。本文采用出口系数模型，根据主要污染源，对农业面源总氮（TN）和总磷（TP）的污染负荷进行了评估。结果表明，杭州市农业总氮的农业面源污染负荷为18166t，其中畜牧业总氮排放量最大。 TP的农业面源污染负荷为1668t，从农村生活中输出的TP负荷最大。然后分析了TN负荷和TP负荷的空间分布。结果表明，杭州市中区存在最小的总氮负荷和总磷负荷。 TN，TP的最大负荷存在于围绕中心区的萧山，余杭和富阳。淳安，建德和临安的TN负荷和TP负荷与当地的生态保护和地形密切相关。该评估将为决策者减少TN负荷和TP负荷提供有效的支持。

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