文章摘要
纪道斌,周哲轩,杨忠勇,龙良红,王耀耀.三峡出库流量日调节模式驱动的重力波问题[J].水利学报,2021,52(1):111-119
三峡出库流量日调节模式驱动的重力波问题
Study on the gravity wave induced by the diurnal variation of outflow discharge in the Three Gorges Reservoir
投稿时间:2020-06-08  修订日期:2020-10-26
DOI:10.13243/j.cnki.slxb.20200407
中文关键词: 三峡水库  流量调节  重力波  沿程传播
英文关键词: Three Gorges Reservoir  outflow discharge fluctuation  gravity wave  wave propagation in a res- ervoir
基金项目:国家自然科学基金项目(91647207,52079069,51779128,51879099);国家留学基金委访问学者项目
作者单位E-mail
纪道斌 三峡大学 水利与环境学院, 湖北 宜昌 443002
三峡大学 三峡水库生态系统湖北省野外科学观测研究站, 湖北 宜昌 443002 
 
周哲轩 三峡大学 水利与环境学院, 湖北 宜昌 443002  
杨忠勇 三峡大学 水利与环境学院, 湖北 宜昌 443002
三峡大学 三峡水库生态系统湖北省野外科学观测研究站, 湖北 宜昌 443002 
ayong0710@163.com 
龙良红 三峡大学 水利与环境学院, 湖北 宜昌 443002  
王耀耀 三峡大学 水利与环境学院, 湖北 宜昌 443002  
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中文摘要:
      受三峡电站昼夜发电负荷不均的影响,三峡出库流量呈显著的日调节模式,驱动坝前水位以重力波形式在库区传播,对水库水动力特征产生着影响,但针对该重力波的生成和传播机理仍待研究。文中基于2018年1-10月三峡水库的出入库流量和库区多个站点上的水位等实测资料,分析了日调节模式下三峡水库坝前重力波的生成机理及其在库区430 km范围内的传播特征。主要研究结论包括:(1)坝前日调节重力波生成时,其振幅与昼夜下泄水量差成正比,与库区背景水位成反比,文中给出了相应的坝前水位振幅估算公式;(2)在河道底摩擦、断面形状沿程变化、干支流入流等多方面因素影响下,日调节重力波在坝前430 km范围内,其振幅呈现先减小后增大的趋势,其滞后相位沿程逐渐增加,且振幅和相位沿程变化特征受库区背景水位影响显著。
英文摘要:
      Diurnal variation of water level has been observed in Three Gorges Reservoir (TGR), which is driven by the outflow discharge fluctuation, and would travel toward upstream along TGR as a gravity wave. The mechanism of generation and propagation along the reservoir is still unclear. To study the genera- tion mechanism and propagation process of this gravity wave, the field data of discharge and water level during January and October, 2018 was analyzed with methods of wavelet transform and filter analysis. The main results included:(1) the amplitudes of diurnal wave were proportional to accumulated discharge,and inverse proportional to background water level,which can be evaluated by a formula derived in this paper; (2) The wave amplitude experienced a decrease-increase process, while the phase increased gradually, in the process of upstream travelling, under the influence of bottom friction, transverse section, discharge from branches,as well as background water level.
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