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Risk Assessment of Water Pollution in Urban Rivers of Northwest China
Author(s) -
Yinge Liu,
Huanhuan Zhou,
Runhe Zheng,
Jiangchuan Bao,
Yuxin Yang
Publication year - 2021
Publication title -
iop conference series earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/697/1/012017
Subject(s) - environmental science , pollution , pollutant , wastewater , sewage , surface runoff , water quality , water pollution , water resource management , environmental engineering , urban runoff , china , sewage treatment , environmental protection , hydrology (agriculture) , stormwater , geography , environmental chemistry , ecology , archaeology , biology , chemistry , geotechnical engineering , engineering
As the main carrier of regional residential sewage, industrial wastewater and surface runoff emissions, urban rivers are most vulnerable to pollution and destruction. Taking the Dongsha River in the city of Baoji in Northwest China as an example, four river pollutants were monitored, and the improved Nemero index and factor information model were established to for risk assessment of river water pollution. While compared with other methods, the method is verified, and it is believed that this method is a good tool to evaluate the water pollution of urban rivers. Moreover, the source load mechanism of urban river pollution is discussed. Evaluation results show that for TP, risk of upstream is highest, and for COD and NH3N, risks of the middle are highest, while for PH, risk of downstream is highest. Overall, COD and ammonia nitrogen are a major pollutant in urban rivers, which pollutants originate from industry and agricultural wastewater discharge. The domestic sewage, solid waste and agricultural wastewater overflows also play an important role in the change of river water quality. These studies provide the basis for urban environmental planning and pollution control.

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