Ecohydraulic modelling to evaluate cascade dam construction impact and support fish habitat restoration

Wang, Qianqian; Han, Yu; Li, Pengcheng; Zhang, Wenming; Wang, Yihang; Xi, Yuqian; Yao, Weiwei

doi:10.1016/j.ecoleng.2023.106974

Cited by 7 publications

(4 citation statements)

References 83 publications

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“…For instance, different fish species would respond differently to hydro‐morphodynamic processes in the river system (Parsapour‐Moghaddam et al, 2019). Specifically, S. prenanti possesses a wider range of hydrodynamic parameters (water depth, water velocity and substrates distribution) than S. davidi (Wang, Han, et al, 2023). When the hydrodynamic parameters altered after the dam construction, S. prenanti has higher adaptability and its habitat shows greater quality.…”

Section: Resultsmentioning

confidence: 99%

“…The endemic fish species are the most common along the river and have the greatest number of individuals among all fish species. Fish including S. prenanti (Q. Wang et al, 2023) and Schizothorax lissolabiatus (Chen et al, 2016; Yue et al, 2016) are the main fish species in the area. Other fish species such as S. davidi (Q. Wang et al, 2023) and Schizothorax yunnanensis taliensis (Chen et al, 2016) are endangered, and some are already extinct over the last 20 years, indicating that the degrading ecological circumstances for a typical upper Lanchang River (Zhang et al, 2018; Zhu et al, 2018).…”

Section: Study Area and Aquatic Statusmentioning

confidence: 99%

“…Fish including S. prenanti (Q. Wang et al, 2023) and Schizothorax lissolabiatus (Chen et al, 2016; Yue et al, 2016) are the main fish species in the area. Other fish species such as S. davidi (Q. Wang et al, 2023) and Schizothorax yunnanensis taliensis (Chen et al, 2016) are endangered, and some are already extinct over the last 20 years, indicating that the degrading ecological circumstances for a typical upper Lanchang River (Zhang et al, 2018; Zhu et al, 2018). Habitat degradation has a particularly significant and detrimental effect on endangered fish species (Yao, 2023).…”

Section: Study Area and Aquatic Statusmentioning

confidence: 99%

“…Particularly, how the infrastructure developments have altered the habitat suitability of different species of fish and how those altered aquatic environments would be restored or managed along with the dam operation guidelines have not been fully addressed (Bradford, 2022; Oliveira et al, 2018; Wu et al, 2019). During the last two decades, studies focused on the effects of ecological flow and the natural discharge on ecosystems (Wang et al, 2023; Yao, 2023); however, only a few studies examined how the modified high flows would directly impact on fish habitats (Benjankar et al, 2018; Li, Chen, Tonina, & Cai, 2015; Quan et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Application of a fish habitat model to assess habitat fragmentation using high flow and sediment transport in the Rumei Dam in Lancang River (China)

Yang,

Bao,

Cong

et al. 2023

Ecohydrology

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Dam construction and operation can result in serious disturbances to the downstream flow regime and fluvial process, river morphology and the river's ecological condition worldwide. To understand the effects of discharge and sedimentation on fish habitats and ecosystems, an ecohydraulic approach was applied to one of the mega hydropower schemes in the downstream Lancang River (Tibet). The approach comprised a dam operation module with high flow and sediment transport and the application of a dynamic fish habitat model for assessing habitat fragmentation of two targeted fish species: Schizothorax prenanti (S. prenanti) and Schizothorax davidi (S. davidi). The hydrodynamics of the river system and the assessed fish habitat show a significant impact of dam construction and operation on the downstream riverine ecosystem, in which fish habitats were found rapidly deteriorated with the destruction of feeding and reproductive grounds. To improve fish habitat after dam construction, the sediment supplement was applied to the river and shown to be a useful restoration strategy, which recovers the habitat fragmentation of target fish. Our model not only is useful to predict dam operation impacts on the Lancang River's ecological status but also shows great potential in mitigating hydropower‐induced environmental impacts and developing river conservation guidelines worldwide.

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Section: Resultsmentioning

confidence: 99%