CONTRIBUTION OF POLLUTION REDUCTION MEASURES AND METEOROLOGICAL CONDITIONS TO IMPROVEMENT OF WATER ENVIRONMENT OF THE MINJIANG RIVER BASIN IN THE MIDDLE OF THE 13TH FIVE-YEAR PLAN BASED ON SWAT MODEL

LIU Qian; WANG Wei; LUO Bin; WANG Kang

doi:10.13205/j.hjgc.202105007

Volume 39 Issue 5

Jan. 2022

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LIU Qian, WANG Wei, LUO Bin, WANG Kang. CONTRIBUTION OF POLLUTION REDUCTION MEASURES AND METEOROLOGICAL CONDITIONS TO IMPROVEMENT OF WATER ENVIRONMENT OF THE MINJIANG RIVER BASIN IN THE MIDDLE OF THE 13TH FIVE-YEAR PLAN BASED ON SWAT MODEL[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(5): 45-54. doi: 10.13205/j.hjgc.202105007

Citation:

LIU Qian, WANG Wei, LUO Bin, WANG Kang. CONTRIBUTION OF POLLUTION REDUCTION MEASURES AND METEOROLOGICAL CONDITIONS TO IMPROVEMENT OF WATER ENVIRONMENT OF THE MINJIANG RIVER BASIN IN THE MIDDLE OF THE 13TH FIVE-YEAR PLAN BASED ON SWAT MODEL[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(5): 45-54. doi: 10.13205/j.hjgc.202105007

Citation:

LIU Qian, WANG Wei, LUO Bin, WANG Kang. CONTRIBUTION OF POLLUTION REDUCTION MEASURES AND METEOROLOGICAL CONDITIONS TO IMPROVEMENT OF WATER ENVIRONMENT OF THE MINJIANG RIVER BASIN IN THE MIDDLE OF THE 13TH FIVE-YEAR PLAN BASED ON SWAT MODEL[J]. ENVIRONMENTAL ENGINEERING , 2021, 39(5): 45-54. doi: 10.13205/j.hjgc.202105007

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CONTRIBUTION OF POLLUTION REDUCTION MEASURES AND METEOROLOGICAL CONDITIONS TO IMPROVEMENT OF WATER ENVIRONMENT OF THE MINJIANG RIVER BASIN IN THE MIDDLE OF THE 13TH FIVE-YEAR PLAN BASED ON SWAT MODEL

doi: 10.13205/j.hjgc.202105007

LIU Qian¹,
WANG Wei^{1
,
,},
LUO Bin¹,
WANG Kang²

1. Sichuan Academy of Environmental Policy and Planning, Chengdu 610041, China;
2. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China

Received Date: 2020-05-07
Available Online: 2022-01-17

Abstract

Abstract

The distributed hydrological and pollution load model for the Minjiang River Basin was constructed based on SWAT. The Nash-Sutcliffe of simulated hydrological transformation processes exceeded 0.6 and Nash-Sutcliffe of simulated pollutant concentrations exceeded 0.5, which could effectively simulate the hydrological, concentration and flux transformation processes of the Minjiang River Basin from 2015 to 2018. The changes of the main pollutant discharge, the different emission reduction measures of Water Pollution Prevention Action Plan and the meteorological driving conditions contributed to the improvement of the water environment in the Minjiang River Basin were calculated. The results showed that COD_Mn, NH₃, and total TP emissions of 11 national examination sections of the Minjiang River Basin decreased by 8%, 13%, and 12% in 2018, the discharge of wastewater in 8 national examination sections increased, and the discharge of major pollutants decreased simultaneously. The intensity of point sources decreased, but the density increased. The emission intensity in the middle of the Minjiang River Basin was high, and the amount of emission reduction was also prominent. The emission and reduction of pollutants of Chengdu were higher than Meishan at Liangjianggou section. Among the emission reduction measures, urban pollution control played a leading role in reducing pollutant emissions, contributing 53%, 71% and 81% of total emission reduction to COD_Mn, NH₃ and TP, namely. The contribution of emission reduction from domestic sources was greater than that from industrial sources, and the contribution rate of the point sources emission reduction was greater than that of the non-point sources. The contribution rate of pollution reduction measures to the COD_Mn, NH₃ and TP in Liangjianggou section were 20.7%, 26.8% and 34.4%, respectively.
- SWAT,
- pollution reduction measures,
- meteorological conditions,
- improvement contribution,
- the Minjiang River Basin

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References(16)

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