A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Evaluation of hydrological regime alteration and ecological effects in the upper reaches of the Yangtze River, China
The state of water flow is recognized as a key driver of the structure and function of river ecosystems. We selected streamflow data (1960–2020) from three key hydrological stations in the upper Yangtze River: Pingshan, Cuntan, and Yichang. We analyzed the characteristics and changes of the hydrologic regimes of the Yangtze River using the Mann–Kendall method, wavelet analysis, and the IHA-RVA method, and explored the response mechanisms of fish to changes in the hydrological regimes. The results show that (1) the average annual discharge of the upper reaches of the Yangtze River is decreasing, and the abrupt changes in Pingshan, Cuntan, and Yichang stations occurred in 1985, 1998, and 2002, respectively, with the main period of 24–32 years. (2) The overall degree of hydrological changes at Pingshan, Cuntan, and Yichang stations is 45%, 50%, and 61%, respectively, all of which are moderate changes. (3) Dams in the upper reaches of the Yangtze River have caused changes in the flow regime of the Yangtze River. Among them, the changes in the alternating frequency of flow and the annual extreme flow have affected the habitat of aquatic organisms and seriously affected the reproduction of important fishes in the Yangtze River. HIGHLIGHTS Analysis of the variation of the hydrological regime of the upper Yangtze over the past 60 years.; Quantitative evaluation of the degree of alteration of the overall hydrological regime.; Establishing correlation between hydrological indicators and fish reproduction.; Revealing the ecological effects caused by reservoir operation.;
Evaluation of hydrological regime alteration and ecological effects in the upper reaches of the Yangtze River, China
The state of water flow is recognized as a key driver of the structure and function of river ecosystems. We selected streamflow data (1960–2020) from three key hydrological stations in the upper Yangtze River: Pingshan, Cuntan, and Yichang. We analyzed the characteristics and changes of the hydrologic regimes of the Yangtze River using the Mann–Kendall method, wavelet analysis, and the IHA-RVA method, and explored the response mechanisms of fish to changes in the hydrological regimes. The results show that (1) the average annual discharge of the upper reaches of the Yangtze River is decreasing, and the abrupt changes in Pingshan, Cuntan, and Yichang stations occurred in 1985, 1998, and 2002, respectively, with the main period of 24–32 years. (2) The overall degree of hydrological changes at Pingshan, Cuntan, and Yichang stations is 45%, 50%, and 61%, respectively, all of which are moderate changes. (3) Dams in the upper reaches of the Yangtze River have caused changes in the flow regime of the Yangtze River. Among them, the changes in the alternating frequency of flow and the annual extreme flow have affected the habitat of aquatic organisms and seriously affected the reproduction of important fishes in the Yangtze River. HIGHLIGHTS Analysis of the variation of the hydrological regime of the upper Yangtze over the past 60 years.; Quantitative evaluation of the degree of alteration of the overall hydrological regime.; Establishing correlation between hydrological indicators and fish reproduction.; Revealing the ecological effects caused by reservoir operation.;
Evaluation of hydrological regime alteration and ecological effects in the upper reaches of the Yangtze River, China
Hongbo Jiao (author) / Wenxian Guo (author) / Xuyang Jiao (author)
2023
Article (Journal)
Electronic Resource
Unknown
Metadata by DOAJ is licensed under CC BY-SA 1.0
Watershed hydro-ecological zoning in the Upper Reaches of Yangtze River
| British Library Conference Proceedings | 2009
| DOAJ | 2024
Flow-Complexity Analysis of the Upper Reaches of the Yangtze River, China
| Online Contents | 2011