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| Overview and feature analysis of agricultural non-point source pollution in Guangzhou |
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| DOI：10.16768/j.issn.1004-874X.2018.03.013 |
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| Abstract: |
| In order to understand the characteristics of agricultural non-point source pollution（ANPSP）
and make reasonable pollutant control strategies in Guangzhou，taking prefecture city as basic unit，the equivalent
standard pollution load method were conducted to the discharge amount and regional difference of chemical oxygen
demand（COD），total nitrogen（TN） and total phosphorus（TP） from different types of agricultural non-point
source pollutions，including planting，breeding，rural life. And GIS technology was used to assess sensitivity of
pollution sources. The results showed that the COD，TN and TP loads of Guangzhou in 2014 were 605 564.60，
21 235.41 and 1 171.60 t，and emission intensities of these pollutants were 814.54，28.56 and 1.58 kg/hm2，
respectively. The primary pollution source was livestock breeding whose load ratio in equivalent standard reached
74.37%，and the primary pollutant was COD whose load ratio in equivalent standard reached 52.78%. The highest
emission intensity of COD occurred in Huangpu District，the lowest in Liwan District. The highest emission intensity
of TN and TP occurred in Tianhe District，the lowerst in Conghua District. The highest sensitive areas and priority
control areas were Huadu District，Baiyun District，Huangpu District and Panyu District for the whole Guangzhou. |
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