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Article

Quantifying the Contribution of Agricultural and Urban Non-Point Source Pollutant Loads in Watershed with Urban Agglomeration

by 1,2, 1, 1,*, 1,*, 1,2 and 3
1
CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China
2
College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China
3
Affairs Service Center of Natural Resources of Liaoning Province, Shenyang 110032, China
*
Authors to whom correspondence should be addressed.
Academic Editor: Alexander Yakirevich
Water 2021, 13(10), 1385; https://doi.org/10.3390/w13101385
Received: 16 March 2021 / Revised: 6 May 2021 / Accepted: 7 May 2021 / Published: 16 May 2021
Urban agglomeration is a new characteristic of the Chinese urbanization process, and most of the urban agglomeration is located in the same watershed. Thus, urban non-point source (NPS) pollution, especially the characteristic pollutants in urban areas, aggravates NPS pollution at the watershed scale. Many agricultural studies have been performed at the watershed scale; however, few studies have provided a study framework for estimating the urban NPS pollution in an urban catchment. In this study, an integrated approach for estimating agricultural and urban NPS pollution in an urban agglomeration watershed was proposed by coupling the Soil and Water Assessment Tool (SWAT), the event mean concentration (EMC) method and the Storm Water Management Model (SWMM). The Hun-Taizi River watershed, which contains a typical urban agglomeration and is located in northeastern China, was chosen as the study case. The results indicated that the per unit areas of total nitrogen (TN) and total phosphorus (TP) in the built-up area simulated by the EMC method were 11.9% and 23 times higher than the values simulated by the SWAT. The SWAT greatly underestimated the nutrient yield in the built-up area. This integrated method could provide guidance for water environment management plans considering agricultural and urban NPS pollution in an urban catchment. View Full-Text
Keywords: non-point source pollutant loads; Soil and Water Assessment Tool; event mean concentration; Storm Water Management Model; urban catchment non-point source pollutant loads; Soil and Water Assessment Tool; event mean concentration; Storm Water Management Model; urban catchment
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MDPI and ACS Style

Zong, M.; Hu, Y.; Liu, M.; Li, C.; Wang, C.; Liu, J. Quantifying the Contribution of Agricultural and Urban Non-Point Source Pollutant Loads in Watershed with Urban Agglomeration. Water 2021, 13, 1385. https://doi.org/10.3390/w13101385

AMA Style

Zong M, Hu Y, Liu M, Li C, Wang C, Liu J. Quantifying the Contribution of Agricultural and Urban Non-Point Source Pollutant Loads in Watershed with Urban Agglomeration. Water. 2021; 13(10):1385. https://doi.org/10.3390/w13101385

Chicago/Turabian Style

Zong, Min, Yuanman Hu, Miao Liu, Chunlin Li, Cong Wang, and Jianxin Liu. 2021. "Quantifying the Contribution of Agricultural and Urban Non-Point Source Pollutant Loads in Watershed with Urban Agglomeration" Water 13, no. 10: 1385. https://doi.org/10.3390/w13101385

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