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The Changing Hydrology of an Irrigated and Dammed Yangtze River: Streamflow, Extremes, and Lake Hydrodynamics

Hao, Haoran; Dong, Ningpeng; Yang, Mingxiang; Wei, Jianhui ORCID iD icon 1; Zhang, Xuejun; Xu, Shiqin; Yan, Denghua; Ren, Liliang; Leng, Guoyong; Chen, Lu; Zhou, Xudong; Wang, Hao; Song, Lijuan; Kunstmann, Harald 1
1 Institut für Meteorologie und Klimaforschung – Atmosphärische Umweltforschung (IMK-IFU), Karlsruher Institut für Technologie (KIT)

Abstract:

Understanding the role of anthropogenic activities in the hydrological cycle is critical to support sustainable water management for the Yangtze River Basin (YRB), which experiences extensive dam operation, irrigation and water withdrawal. However, this remains challenging due to insufficient accuracies of existing process-based models for fully depicting anthropogenic activities as part of the hydrological cycle. To this end, this study enhances a national-scale coupled land surface-hydrologic-hydrodynamic model (CLHMS) with a dynamic irrigation scheme for distinct crops, an extended reservoir operation scheme incorporating both water storage anomalies and water demand anomalies, and a cost-function-based approach to link water demands with reservoir operation. The enhanced model is extensively validated against historical streamflow, water storage of 90 reservoirs, and irrigation water withdrawal in the YRB, and the water level and storage of the Poyang Lake (PYL). By setting up controlled experiments in the YRB, we show that the streamflow decreases by 2%–6% due to irrigation and water withdrawal, and manifests an attenuated seasonality due to reservoir operation. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000175066
Veröffentlicht am 18.10.2024
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Umweltforschung (IMK-IFU)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 10.2024
Sprache Englisch
Identifikator ISSN: 0043-1397, 1944-7973
KITopen-ID: 1000175066
HGF-Programm 12.11.33 (POF IV, LK 01) Regional Climate and Hydrological Cycle
Erschienen in Water Resources Research
Verlag John Wiley and Sons
Band 60
Heft 10
Seiten e2024WR037841
Vorab online veröffentlicht am 30.09.2024
Schlagwörter human impact, reservoir operation, irrigation, land surface, hydrology, hydrodynamics
Nachgewiesen in Web of Science
Dimensions
Scopus
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