Research on water environmental capacity accounting of the Yongzhou Section of Xiangjiang River Basin based on the SWAT-EFDC coupling model

Wu, Li; Chen, Zhe; Xuan, Dong; Liu, Huiying; Wang, Dunqiu

doi:10.2166/wcc.2021.319

Cited by 4 publications

(3 citation statements)

References 13 publications

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“…Scientific quantification of water environmental capacity is the basis of watershed pollutant management, and the accurate calculation of dynamic water environmental capacity is the key to achieving accurate management of river basins. At present, researchers have begun to explore management measures based on dynamic water environmental capacity [40,41]. This study calculated the dynamic water environment capacity based on the control unit.…”

Section: Analysis Of Dynamic Water Environment Capacitymentioning

confidence: 99%

Dynamic Water Environment Capacity Assessment Based on Control Unit Coupled with SWAT Model and Differential Evolution Algorithm

Wang

Dang

Liu

et al. 2023

Water

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Water pollution is a serious problem in China and abroad. Revealing the source types and their spatio-temporal characteristics is the premise of effective watershed management and pollution prevention. Since the national control unit can better match the administrative division, it was useful for the manager to control water pollution. Taking the Fenhe River Basin as the research area, a SWAT model based on the national control unit was established in this study to reveal the current situation of water quantity and quality. Then, in combination with the differential evolution algorithm, the dynamic water environment capacities of each control unit were further discussed. The results showed that the flow upstream was lower, only 7.62–8.40 m3/s, but flow in the midstream and downstream increased to 17.58 m3/s and 18.32 m3/s. Additionally, the flow in tributaries was generally lower than that in the main stream, the flow in unit 6 and unit 11 were only 0.23 m3/s and 0.62 m3/s. The water quality upstream could meet the water quality requirements of drinking water sources, but the pollution in the midstream was the most serious after passing through Taiyuan City, the concentration of NH3-N and TP reached to 6.75 mg/L and 0.41 mg/L. The results of water environmental capacity showed that the residual capacity of ammonia nitrogen (NH3-N) and total phosphorus (TP) in the main stream were positive, indicating that the Fenhe River Basin can accommodate the current pollution load in general, but there was an obvious difference in different months of the year. Especially in the wet season, the non-point source (NPS) pollution problem in the midstream and downstream was more prominent, resulting in a high-capacity consumption rate. It showed that in Taiyuan, Jinzhong, and Linfen Yuncheng in Shanxi Province, should be wary of non-point source pollution. In addition, the water environmental capacity of different units also varied greatly. The capacity consumption of the Taiyuan Section in the midstream was the highest, which mainly occurred in the wet season. The negative values of the residual capacity of NH3-N and TP reached the highest, −131.3 tons/month and −12.1 tons/month. Moreover, the capacity consumption downstream also reached 21–40% of the whole year in the wet season. In addition to the impact of NPS pollution in the wet season, due to the impact of point source pollution, units 8, 9, and 10 downstream had high negative residual capacity in the dry season, especially in January and February. The construction of a SWAT model based on control units and the further analysis of dynamic water environment capacity could provide technical support for Fenhe River Basin management to realize accurate pollution control.

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Section: Analysis Of Dynamic Water Environment Capacitymentioning

confidence: 99%

Dynamic Water Environment Capacity Assessment Based on Control Unit Coupled with SWAT Model and Differential Evolution Algorithm

Wang

Dang

Liu

et al. 2023

Water

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“…The comprehensive attenuation coefficient of simulated substances is calculated according to Equation 4, where C 0 is the initial sectional simulated substance concentration (Wu et al, 2021).…”

Section: One-dimensional Hydrodynamic Water Quality Mathematical Modelmentioning

confidence: 99%

“…Water environmental capacity (WEC) is an essential index for the effective water quality management (Wang et al, 2021). The concept of WEC first appeared in the total maximum daily load management plan proposed by the United States in 1972 (Wu et al, 2021). It refers to the full amount of pollutants that can be accommodated in a particular water area under the limitation of target water quality (Sun et al, 2019;Wei et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Study on water quality simulation and dynamic water environment capacity of Helan County section of the third drainage ditch in Ningxia

et al. 2022

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The Helan section of the third drainage ditch in Ningxia is selected as the research object, and its water environmental capacity is analyzed; The Daily discharge and water level are calculated according to the measured data; Then the daily concentration values of the main water quality indexes are simulated by one-dimensional hydrodynamic water quality mathematical model; Finally, the dynamic water environment capacity is calculated. The results show that from May to October 2020, the main water quality indicators exceeding the standard in Helan section of the third drainage ditch were total nitrogen and five-day biochemical oxygen demand. Their water environmental capacity was −11.8744 t and −67.1173 t, respectively. Chemical oxygen demand and total phosphorus exceeded the standard severely in some months. There are problems of eutrophication and high organic content in drainage ditches. The primary pollution sources are aquaculture wastewater form fishery, farmland drainage, seasonal flood, and domestic sewage. It is suggested to take preventive measures such as source control, process blocking, and end treatment.

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Effects of Fertilization of Different Crops on Non-Point Source Pollution in the Upper Reaches of Erhai Lake Basin

Zhao,

Li,

Zheng

et al. 2023

Water Air Soil Pollut

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Research on water environmental capacity accounting of the Yongzhou Section of Xiangjiang River Basin based on the SWAT-EFDC coupling model

Cited by 4 publications

References 13 publications

Dynamic Water Environment Capacity Assessment Based on Control Unit Coupled with SWAT Model and Differential Evolution Algorithm

Dynamic Water Environment Capacity Assessment Based on Control Unit Coupled with SWAT Model and Differential Evolution Algorithm

Study on water quality simulation and dynamic water environment capacity of Helan County section of the third drainage ditch in Ningxia

Effects of Fertilization of Different Crops on Non-Point Source Pollution in the Upper Reaches of Erhai Lake Basin

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