Impact of dam construction on precipitation: a regional perspective
Xiaolei Zhu A , Ziyi Xu A , Zhixin Liu A * , Mingzhe Liu B * , Zhengtong Yin C , Lirong Yin D and Wenfeng Zheng E *A School of Life Science, Shaoxing University, Shaoxing 312000, PR China.
B School of Data Science and Artificial Intelligence, Wenzhou University of Technology, Wenzhou 325000, PR China.
C College of Resource and Environment Engineering, Guizhou University, Guiyang 550025, PR China.
D Department of Geography and Anthropology, Louisiana State University, Baton Rouge, LA 70803, USA.
E School of Automation, University of Electronic Science and Technology of China, Chengdu 610054, PR China.
Handling Editor: Wan Zhanhong
Marine and Freshwater Research 74(10) 877-890 https://doi.org/10.1071/MF22135
Submitted: 19 July 2022 Accepted: 31 October 2022 Published: 7 December 2022
© 2023 The Author(s) (or their employer(s)). Published by CSIRO Publishing
Abstract
Context: Numerous dams have been built in China to develop hydropower, a sustainable and clean energy source. In recent years, the impact of dam construction on the regional climate has gradually attracted the attention of researchers.
Aims: This study has evaluated the impact of large-scale dam construction on regional precipitation.
Methods: This paper used the precipitation data of more than 2400 national stations of the China National Meteorological Information Center from 1990 to 2012. The regional precipitation data before and after the construction of the Xiaolangdi Dam and the Three Gorges Dam on the Yangtze River were analysed using geostatistical tools. Wavelet transform and Yamamoto signal-to-noise ratio analysis were further adopted.
Key results: Analysis of the variation points of precipitation characteristics confirmed the correlation between dam construction and regional precipitation; the precipitation values in the two dam study areas had an increasing trend after the completion of the dams, and the fitting trend line showed an obvious increasing trend.
Conclusions: According to the analysis of precipitation variation points, it can be concluded that the establishment of the dam affected the precipitation in the area of ∼200 km upstream and increased the precipitation value in this area. The study showed that dam construction has a strong correlation with regional precipitation.
Implications: It is speculated that the construction of super dams will have a greater impact on precipitation.
Keywords: correlation analysis, geostatistical analysis, large-scale dam, precipitation change, regional climate, regional precipitation, wavelet transform, Yamamoto signal-to-noise ratio analysis.
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