Abstract
This article investigates the hydrological response and ecological flow in the diversion area from the Hanjiang River to the Weihe River. Quantifies the impact of the inter-basin diversion project on the hydro-ecological environment of the downstream river. MIKE BASIN is initially utilized in this research to create the multi-year reservoir operating model of Sanhekou Reservoir. Then Indicators of Hydrologic Alteration (IHA) and Range of Variability Approach (RVA) are used to evaluate the change degree of hydrological indicators. Secondly, set seven different ecological flow process schemes considering ecological demand and inter-annual wetness and dryness variability. Finally, evaluate the optimization scheme by Analytic Hierarchy Process (AHP). According to the hydrological response results, suggestions are put forward from the perspective of engineering and non-engineering. The results show that the simulation results of the MIKE BASIN have a high degree of fitting with the design results, which verifies the rationality of the model. Under the design scheme, the overall hydrological change of the river is 72.91% and the hydrological response of the river is high changed. Scheme 6 can reduce the overall hydrological change to (56.63%) moderate change under the premise of less impact on economic benefits, and scheme 6 is the optimal scheme. The research results not only guarantee the ecological function of the river but also provide guidance and reference significance for the actual operation of the reservoir.
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The dataset on which this paper is based is too large to be retained or publicly archived with available resources. Documentation and data used to support this study are available from Geospatial Data Cloud and hydrological station data.
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Funding
This research was funded by the following projects: National Natural Science Foundation of China (Grant No.52179025). National Natural Science Foundation of China (Grant No. 51879213). Project funded by China Postdoctoral Science Foundation (2019T120933). Basic Research Plan of Natural Science of Shaanxi Province (2019JLM-52). Planning project of science and technology of water resources of Shaanxi (2017slkj-16).
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Tao Bai: Term, Software, Resources, Writing–Original Draft, Visualization, Project administration, Funding acquisition. Xian-ge Sun: Investigation, Data Curation, Writing–Review & Editing. Jian Wei: Validation, Formal analysis. Lianzhou Wu: Conceptualization, Supervision.
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Bai, T., Sun, XG., Wei, J. et al. Hydrological Response and Ecological Flow Optimization in Water Diversion Area of Inter-basin Water Diversion Project. Water Resour Manage 36, 5839–5865 (2022). https://doi.org/10.1007/s11269-022-03309-8
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DOI: https://doi.org/10.1007/s11269-022-03309-8