Unveiling direct and indirect impacts of the Three Gorges Project for supporting synergistic water-power management

Han, Dengcheng; Huang, Guohe; Liu, Lirong; Zhai, Mengyu; Fu, Yupeng; Gao, Sichen; Li, Jianyong; Pan, Xunzhang

doi:10.1016/j.jclepro.2022.130547

Cited by 2 publications

(1 citation statement)

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“…Since the beginning of this century, human activities have become the leading factor in the evolution and adjustment of the hydrological situations of rivers and lakes (Yuan et al, 2015;Lai et al, 2021;Lei et al, 2021;Yuan et al, 2021). In the case of the Yangtze River Basin, considerable attention has been given to the impact of the Three Gorges Project on the hydrological regimes (Lai et al, 2016;Guo et al, 2021), sediment transport (Yang et al, 2014;Huang et al, 2019), river erosion and deposition (Dai and Liu, 2013;Tang et al, 2021), shipping (Fan et al, 2015;Xue et al, 2021), and other fields (Xu et al, 2013;Han et al, 2022). Meanwhile, studies on the river-lake relationship, featured by both the Dongting and Poyang Lakes, respectively situated in the middle and lower reaches of the Yangtze River, have become the focus in water security and water resources (Lai et al, 2014;Wang et al, 2014;Yuan et al, 2015;Feng et al, 2017;Gao et al, 2020;Lai et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Modified Hydrological Regime on Irrigation and Water Supply in Lake Areas: A Case Study of the Yangtze River–Dongting Lake

Juanjuan

Wang

et al. 2022

Front. Earth Sci.

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Lake systems are of fundamental significance for the ecological environment and social development. Driven by climatic changes and human activities, the hydrological situation of rivers and lakes has been altered considerably, and it has directly affected the reliability of irrigation and water supply in lake areas. In the case of the Yangtze River–Dongting Lake area, the quasi-equilibrium of their hydrological states and water balance have been affected by the operation of the Three Gorges Project that has led to irrigation and water supply problems across the lake area. Ever since, the available water supply in the Dongting Lake area has decreased by 31.5% and 47.7% during the months of September and October, and the overall water level in the lake area has dropped by 0.8–2.0 m. The proportion of domestic and agricultural irrigation water demands to available water supply in the Dongting Lake area is very small, and the decline of water level is the main reason for the lack of water supply in Dongting Lake area, Although the total amount of water in the lake area is still above the water supply threshold, an obvious decreasing trend has been observed in the fulfillment of the demand for both irrigation and water supply in urban and rural regions. Additionally, the fulfillment of secured water supply and irrigation requirements has respectively dropped from 95% to 78% before the operation of the Three Gorges Project to 82% and 46% after it. Meanwhile, the total water shortage increased from 57.683 to 143.607 million cubic meters. By advancing or postponing impoundment schedules, the impact of the Three Gorges Reservoir on irrigation and water supply in the lake area during September and October can be alleviated, and the water supply capacity can be respectively increased by approximately 1.3% and 1.4%. The highlights of this study include the quantification of the impacts of the operation of large-scale water conservancy projects at the level at which the requirements on irrigation and water supply in the lake area are satisfied, and the prediction of the trends for future evolvement. In addition, corresponding strategies that provide a technical reference for the comprehensive regulation and control over water resources and the security of water supply in the river basin are discussed.

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