| 摘要: |
| 为提高汛前调水调沙期多目标博弈过程中小浪底水库的综合效益,本文构建了调水调沙模拟与综合效益定量评估数学模型。该模型由3个模块构成,其中：水沙计算模块考虑库区明流与异重流输移及干支流倒回灌过程,水库调度模块衔接库区水沙计算和坝下泥沙冲淤计算,效益评价模块采用经济效益指标衡量水库的综合效益。采用2013年及2014年汛前调水调沙过程对该模型开展了参数率定和验证工作,计算结果可模拟异重流潜入、演进、出库的全过程,以及水库调度和发电过程。根据历年调水调沙实践经验选取关键调度参数,最终拟定降低对接水位或减小壅水程度的5种方案,采用模型对各方案展开调水调沙过程计算和综合效益评价。结果表明,调度过程中改变对接水位和壅水程度在减淤效益和兴利效益间存在冲突。通过比较综合经济效益指标,最终推荐对接水位为222.57 m并减小库区壅水的方案作为优选方案,可获得最大的综合效益。 |
| 关键词: 汛前调水调沙 水库调度 综合效益 数值模拟 小浪底水库 |
| DOI： |
| 分类号: |
| 基金项目:国家自然科学基金项目(U2243238)；重点研发计划课题(2023YFC3209300) |
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| Modelling of the flow and sediment regulation processes before the flood season in the Xiaolangdi Reservoir and evaluation of comprehensive benefits |
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XIA Junqiang,ZHANG Xianziyi,WANG Zenghui,CHEN Cuixia,ZHOU Zuhao
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1.State Key Laboratory of Water Resources Engineering and Management,Wuhan University;2.Yellow River Engineering Consulting Co,Ltd
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| Abstract: |
| To improve the comprehensive benefits of the Xiaolangdi Reservoir in gaming among multi-objectives during the flow and sediment regulation processes before the flood season, an integrated model has been proposed, which can simulate the flow-sediment transport in the reservoir zone and quantitatively evaluate the comprehensive benefits of reservoir operation. The integrated model consists of three sub-modules, including: a flow-sediment transport module, which considers the process of turbidity currents and flow exchanges between the mainstream and tributaries; a reservoir regulation module, which serves as a connection between the flow-sediment simulation in the reservoir zone and the calculation of channel deformation volume in the Lower Yellow River; a benefit evaluation module, which adopts an economic indicator to measure the comprehensive benefits. Flow and sediment regulation events in the Xiaolangdi Reservoir in 2013 and 2014 were used for model calibration and verification, showing that the whole processes of plunging, transport and venting of turbidity current, as well as the outflow and power generation processes, were in good agreement with the measured data. Key operation parameters were selected based on the practical experience of flow-sediment regulation events over the years. Based on the 2014 actual operation process, 5 new operation schemes were designed by reducing the joint water level or decreasing the degree of backwater, and comprehensive benefits of these five operation schemes were assessed. Calculation results show that the changes of joint water levels and backwater conditions in a reservoir regulation process have a conflict between sedimentation reduction and water conservancy. By comparing the economic indicators of designed operation schemes, the operation scheme with the joint water level of 222.57 m and less backwater has been suggested for gaining higher comprehensive benefits in the Xiaolangdi Reservoir. |
| Key words: flow and sediment regulation reservoir operation comprehensive benefits numerical simulation Xiaolangdi Reservoir |
