摘要
三峡水库试验性蓄水以来,随着水库调度运行方式的优化及库区地形条件的变化,需要在新边界下实现对库区沿程水面线的精确模拟,为三峡水库调度决策提供快速辅助支持。结合实测水位-库容曲线,构建了基于库容实时校正的三峡库区河道一维水动力学模型,解决了河道大断面概化无法真实表征天然河道槽蓄能力的问题,并采用试验性蓄水以来多场洪水实测水面线过程对模型进行率定验证。结果表明:沿程多站点模拟水位与实测水位的平均误差均值为0.21~0.58 m,最高水位误差均值为0.10~0.29 m,实现了对三峡库区河道不同来水量级及坝前水位高程下沿程水面线的准确模拟,可为运行管理部门的调度决策提供有效支撑。同时,采用库容实时校正技术可以充分表征库区天然河道对沿程水流演进的槽蓄作用,提升河道型水库一维水动力学模型计算精度。
Since the trial impoundment of the Three Gorges Reservoir,there have been certain changes in the scheduling method and terrain conditions in the reservoir.It is necessary to achieve accurate simulation of the water surface line along the reservoir channel under the new boundaries,providing fast support for the decision-making in operations of Three Gorges Reservoir.A one-dimensional hydrodynamic model of the Three Gorges Reservoir river channel based on real-time reservoir capacity correction technology was established by using the measured capacity curve.It solved the problem of not being able to accurately characterize the storage capacity of natural river channels that were roughly generalized.The model was calibrated and verified by using the measured water level data under multiple flow levels after trial impoundment.The results showed that the average error between the simulated water level and the measured water level at multiple stations was 0.21~0.58m,and the average error of the highest water level was 0.10~0.29m.This can accurately simulate the water surface line under different inflow quantities entering the reservoir and water levels at the dam front,providing effective supports for the scheduling decisions of the operation management department.Meanwhile,real-time capacity correction technology can fully characterize the channel storage effect of natural river channels on water flow evolution,improving the calculation accuracy of one-dimensional hydrodynamic models for river type reservoirs.
作者
荆柱
马皓宇
李肖男
徐杨
杨钰琪
卢佳
JING Zhu;MA Haoyu;LI Xiaonan;XU Yang;YANG Yuqi;LU Jia(China Yangtze Power Co.,Ltd,Yichang 443002,China;Changjiang Survey,Planning,Design and Research Co.,Ltd.,Wuhan 430010,China;Hubei Key Laboratory of Intelligent Yangtze and Hydroelectric Science,Yichang 443002,China)
出处
《人民长江》
北大核心
2024年第12期131-139,共9页
Yangtze River
基金
国家重点研发计划项目(2022YFC3002705)
中国长江电力股份有限公司项目(Z242302001)
关键词
三峡水库
库容实时校正
一维水动力学模型
水面线
Three Gorges Reservoir
real-time reservoir capacity correction
one-dimensional hydrodynamic model
water surface line
