维持黄河下游中水河槽的小浪底调控指标分析

发布时间：2019-04-08 10:03

【摘要】：塑造和维持黄河下游中水河槽,是维护黄河健康生命的一项重要任务,也是对小浪底水库拦沙期运用的基本要求。通过分析黄河下游河道平滩流量的变化与进入下游的水沙量之间的响应关系,以及建立平滩流量与滑动平均汛期水量和洪水流量的关系,提出长期维持黄河下游中水河槽的调控指标为:流量不小于2 600 m~3/s,历时不小于6 d。通过分析当前4 000 m~3/s左右中水河槽的下游河道洪水冲淤特性,提出当前维持中水河槽对小浪底水库的运用要求为:汛前调水调沙尽可能塑造接近下游平滩流量的洪水过程,调控流量为3 500 m~3/s左右;汛期结合中游洪水过程塑造2 500m~3/s以上量级且具有一定历时的洪水过程。
[Abstract]:Shaping and maintaining the middle-water channel in the lower reaches of the Yellow River is an important task to maintain the healthy life of the Yellow River and is also the basic requirement for the operation of the Xiaolangdi Reservoir during the sand-blocking period. Based on the analysis of the relationship between the change of flat discharge and the amount of water and sediment entering the lower reaches of the Yellow River, the relationship between the flat discharge and the average water volume and flood discharge in the sliding flood season is established. It is pointed out that the regulation and control index of long-term maintenance of the middle-water channel in the lower Yellow River is as follows: the discharge is not less than 2 600 m / 3, the duration is no less than 6 d Based on the analysis of the scouring and silting characteristics of the downstream channel of the current 4 000 m / 3 / s middle-water channel, it is pointed out that the requirement for the operation of the Xiaolangdi reservoir to maintain the middle-water channel at present is as follows: the flood process which is close to the downstream flat discharge can be shaped by the water and sediment regulation before the flood season. The regulated flow is about 3 500 m / 3 / s; In combination with the flood process in the middle reaches of the flood season, the flood process is of an order of more than 2 500m~3/s and has a certain duration.
【作者单位】：黄河勘测规划设计有限公司;河南省水利勘测设计有限公司;
【基金】：国家重点研发计划项目(2016YFC0402501) “十二五”国家科技支撑计划项目(2013BAC10B02)
【分类号】：TV14;TV697

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