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| DOI：10.13522/j.cnki.ggps. 2023578 |
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| Study on the impact of hydropower development on water temperature in cascade reservoirs in the middle and upper reaches of Dadu River |
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HUANG Xiang, CHEN Xuefeng, XU Lihao
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1. CHN Energy Dadu River Basin Hydropower Development Co., Ltd, Chengdu 610000, China;
2. State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China
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| Abstract: |
| The establishment of cascade hydropower stations has changed the water temperature of the original river. The purpose is to fully understand the cumulative impact of water temperature caused by the built cascade power stations in the Monkeyyan-Pubugou section of the Dadu River mainstream, and provide basic support for subsequent river cascade development, optimal dispatch, and river ecological restoration. This study is based on the Monkeyyan-Pubugou development river. By analyzing the water temperature monitoring data of the section, the relevant laws of the cumulative impact of water temperature in the cascade reservoir area and the discharged water were studied. Research results showed that the Monkey Rock, Dagangshan and Pubugou reservoirs in the middle and upper reaches of the Dadu River were all seasonally stratified reservoirs, but there were differences in the seasons with the strongest thermal stratification and the duration; The upstream cascade runs in Dagangshan And the cumulative water temperature at the Pupugou dam site has a more significant impact. This study also developed a method to estimate the critical river length for water temperature recovery, and clarified the rebalancing mechanism of river section water temperature affected by cascade development. |
| Key words: cascade development; water temperature structure; cumulative impact of water temperature; critical river length |
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