Future changes in Yuan River ecohydrology: Individual and cumulative impacts of climates change and cascade hydropower development on runoff and aquatic habitat quality

The Science of the Total Environment
Xin WenJin Quan

Abstract

The eco-hydrological system in southwestern China is undergoing great changes in recent decades owing to climate change and extensive cascading hydropower exploitation. With a growing recognition that multiple drivers often interact in complex and nonadditive ways, the purpose of this study is to predict the potential future changes in streamflow and fish habitat quality in the Yuan River and quantify the individual and cumulative effect of cascade damming and climate change. The bias corrected and spatial downscaled Coupled Model Intercomparison Project Phase 5 (CMIP5) General Circulation Model (GCM) projections are employed to drive the Soil and Water Assessment Tool (SWAT) hydrological model and to simulate and predict runoff responses under diverse scenarios. Physical habitat simulation model is established to quantify the relationship between river hydrology and fish habitat, and the relative change rate is used to assess the individual and combined effects of cascade damming and climate change. Mean annual temperature, precipitation and runoff in 2015-2100 show an increasing trend compared with that in 1951-2010, with a particularly pronounced difference between dry and wet years. The ecological habitat quality is improve...Continue Reading

Citations

Apr 6, 2019·Journal of Fish Biology·Vittoria L ElliottGordon W Holtgrieve
Apr 5, 2020·International Journal of Environmental Research and Public Health·Jiahong LiPeiru Yan
Jan 11, 2020·The Science of the Total Environment·Yuxue GuoJingkai Xie
Jan 15, 2020·The Science of the Total Environment·Fang LiuShanshan Liu
Apr 4, 2021·The Science of the Total Environment·Zhaofeng GuoYing Weng

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