IMPACT OF RAINFALL VARIATION ON NON-POINT SOURCE POLLUTION IN LE'AN RIVER WATERSHED, POYANG LAKE BASIN

LI Yuanyuan; WANG Hua; YUAN Weihao; ZENG Yichuan; DENG Yanqing; SHEN Zilin; ZHANG Pengcheng

doi:10.13205/j.hjgc.202302003

Volume 41 Issue 2

Feb. 2023

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2023 > 41(2): 16-23

LI Yuanyuan, WANG Hua, YUAN Weihao, ZENG Yichuan, DENG Yanqing, SHEN Zilin, ZHANG Pengcheng. IMPACT OF RAINFALL VARIATION ON NON-POINT SOURCE POLLUTION IN LE'AN RIVER WATERSHED, POYANG LAKE BASIN[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(2): 16-23. doi: 10.13205/j.hjgc.202302003

Citation:

LI Yuanyuan, WANG Hua, YUAN Weihao, ZENG Yichuan, DENG Yanqing, SHEN Zilin, ZHANG Pengcheng. IMPACT OF RAINFALL VARIATION ON NON-POINT SOURCE POLLUTION IN LE'AN RIVER WATERSHED, POYANG LAKE BASIN[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(2): 16-23. doi: 10.13205/j.hjgc.202302003

Citation:

LI Yuanyuan, WANG Hua, YUAN Weihao, ZENG Yichuan, DENG Yanqing, SHEN Zilin, ZHANG Pengcheng. IMPACT OF RAINFALL VARIATION ON NON-POINT SOURCE POLLUTION IN LE'AN RIVER WATERSHED, POYANG LAKE BASIN[J]. ENVIRONMENTAL ENGINEERING , 2023, 41(2): 16-23. doi: 10.13205/j.hjgc.202302003

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IMPACT OF RAINFALL VARIATION ON NON-POINT SOURCE POLLUTION IN LE'AN RIVER WATERSHED, POYANG LAKE BASIN

doi: 10.13205/j.hjgc.202302003

1. College of Environment, Hohai University, Nanjing 210098, China;
2. Key Laboratory of Integrated Regulation and Resource Development on Shallow Lake of Ministry of Education, Hohai University, Nanjing 210098, China;
3. Jiangxi Hydrological Bureau, Nanchang 330000, China

Received Date: 2021-10-03
Available Online: 2023-05-25
Publish Date: 2023-02-01

Abstract

Abstract

Taking Le'an River, a typical into-lake river of Poyang Lake as an example, the SWAT model was constructed. Based on the spatial variation characteristics of land use types in the watershed in 2020, the years of 2014 (normal year), 2015 (wet year) and 2011 (dry year) were selected as typical rainfall years to explore the influence of rainfall variation on nutrient pollutants production regulations. The results showed that the nutrients production load of the watershed showed a trend of wet year>normal year>dry year. The runoff along the main branch area downstream, and the TN and TP in the Dexing-Poyang Wannian section in the middle and downstream were more sensitive to the increase of precipitation. The spatial differences in the response in runoff volume to rainfall reduction in the watershed were not significant. The TN and TP in the Wuyuan-Dexing section responded to the decrease in rainfall to a high degree while the response to the decrease in rainfall in the Poyang-Wannian section was lower. The research results will provide scientific reference for the development of targeted pollution control measures in the watershed and further reduce the nutrient load into Poyang Lake effectively.
- Poyang Lake basin,
- Le'an River Watershed,
- nutrients,
- rainfall variation,
- land use type

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References(38)

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