Assessment of the Impacts of Climate Change on the Water Quality of a Small Deep Reservoir in a Humid-Subtropical Climatic Region

Water

Leon van der Linden¹  Michael Burch¹  Tsair-Fuh Lin²  Chih-Hua Chang²  Chia-Ling Chung²  Long-Yan Cai² 

[1] Australian Water Quality Centre (AWQC), SA Water, Adelaide, SA 5001, Australia;Department of Environmental Engineering and Global Water Quality Research Center,National Cheng Kung University, Tainan 70101, Taiwan;

关键词: reservoir;    climate change;    water quality;    risk;    CE-QUAL-W2;   

DOI  :  10.3390/w7041687

来源: DOAJ

【 摘 要 】

Surface water quality has been identified as potentially vulnerable to climate change. This study assesses the impacts of climate change on the water quality of Hsinshan Reservoir,Taiwan, through CE-QUAL-W2 simulations. The model parameters were calibrated by field data collected during 2004–2008, and verified against observations made during 2009–2012. The projected temperature and precipitation data for the near- andlong-term future were downscaled to regional and daily scales, and used to simulate the projected changes in water quality through the validated model. The simulation results were reported as probability-based cumulative distribution functions to access the impacts of climate change on water quality. The results indicated that the intensified thermal stratification caused by the rising temperature is the primary driver of water quality decline, which increases the probability of deep-layer oxygen depletion and the flux of limiting nutrients for algae growth, resulting in a higher risk of algal blooms and eutrophication. The adaptation strategies of multilevel-intake operations and increasing bottom-layer dissolved oxygen without destratification are recommended.

【 授权许可】

Unknown