三峡水库泄水波与沙市站水位流量响应关系研究

发布时间：2018-04-13 14:35

本文选题：泄水波 + 水位流量关系　；参考：《人民长江》2017年19期

【摘要】：三峡水库投入运行后,其下游特别是荆江河段水沙特性发生了明显改变。长期以来,众多研究者在不同阶段对三峡水库运用后下游河段行洪能力的变化进行了大量研究,但得出的结论和认识不尽相同。沙市站水位流量关系是确定荆江河道行洪能力的主要依据,对于三峡水库实施荆江补偿调度也至关重要。采用数值模拟方法,分析了受河道变化及洪水特性改变双重影响下沙市站水位流量关系的变化规律,同时模拟了沙市洪峰水位与三峡水库不同泄水波的响应关系。结果表明:洪水波的波型变化对沙市水位流量关系产生影响,多数情况下,同流量下断波洪水的洪峰水位略高于天然洪水;沙市河段行洪能力基本未发生变化;不同类型洪水波向下游传播时,其坦化作用各有差异。
[Abstract]:After the three Gorges Reservoir is put into operation, the characteristics of water and sediment in the lower reaches, especially in the Jingjiang reach, have changed obviously.For a long time, many researchers have done a lot of research on the change of flood discharge capacity of the downstream reach after the operation of the three Gorges Reservoir at different stages, but the conclusions and understandings are not the same.The relationship between water level and discharge is the main basis for determining the flood discharge capacity of the Jingjiang River, and it is also very important for the three Gorges Reservoir to carry out the Jingjiang River compensation operation.By means of numerical simulation method, the variation law of water level and discharge relationship of Shashi station under the double influence of river channel change and flood characteristic change is analyzed, and the response relationship between Hong Feng water level and different water discharge waves of three Gorges Reservoir is simulated at the same time.The results show that the wave pattern of flood wave has an effect on the relationship between water level and discharge in sand city. In most cases, Hong Feng's water level is slightly higher than that of natural flood at the same discharge, and the flood discharge capacity of the reach of Shashi river is basically unchanged.When different types of flood waves propagate to the downstream, their calcinations are different.
【作者单位】：长江水利委员会水文局;
【基金】：国家重点研发计划项目(2016YFC0402201)
【分类号】：TV697

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