Analysis and Evaluation of Agricultural Non-point Source Pollution Sources in Four Cities in the Pearl River Delta
Based on the 2018 statistical yearbook,this paper carries out the statistics and analysis on the agricultural non-point source pollution of the four major economic cities,namely Guangzhou,Dongguan,Shenzhen and Foshan in the Pearl River Delta by the inventory analysis method.The study found that:In 2...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Office of Pearl River
2021-01-01
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| Series: | Renmin Zhujiang |
| Subjects: | |
| Online Access: | http://www.renminzhujiang.cn/thesisDetails#10.3969/j.issn.1001-9235.2021.05.005 |
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| Summary: | Based on the 2018 statistical yearbook,this paper carries out the statistics and analysis on the agricultural non-point source pollution of the four major economic cities,namely Guangzhou,Dongguan,Shenzhen and Foshan in the Pearl River Delta by the inventory analysis method.The study found that:In 2018,the four cities in the Pearl River Delta produced 137 179.3 tons of COD,19 345.5 tons of TN,2 865.2 tons of TP,and 2 926.4 tons of NH<sup>+</sup><sub>4</sub>-N from agricultural non-point source pollution,among which the COD is considered as the primary pollutant,mainly from livestock and poultry breeding,while TN,NH<sup>+</sup><sub>4</sub>-N and TP mainly come from rural life and planting industry.In terms of regions,the pollutant emission intensity of Foshan is 427.42 kg/hm<sup>2</sup>,which is 1.5 times that of Guangzhou,ranking first among the four cities.The comprehensive water quality index caused by agricultural non-point source pollution in Guangzhou and Foshan is both greater than 4,so the two cities are considered as severely polluted areas,with heavy pressure to reduce agricultural non-point source pollution,while Dongguan and Shenzhen are lightly polluted areas. |
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| ISSN: | 1001-9235 |