日调节非恒定流对筲箕背河段航道水流条件的影响

选取典型工况通过非恒定数学模型计算分析滩段水位、流量、流速、比降等因素变化特性,得到日调节对筲箕背河段水流条件的影响。结果显示,2种日调节工况下非恒定流传播至筲箕背河段水位变幅在1.01~1.37 m,非恒定流对下游航道水流条件和对研究河段内的控制河段及航道维护设施等产生一定的影响,并且日变幅4.5 m较日变幅3.0 m工况对航道水流条件等影响更大。分析结果为优化枢纽航运调度方案和航道维护措施提供支撑。

Influence of unsteady flow on channel's flow conditions in Shaojibei reach

The typical working conditions are selected to calculate and analyze the various characteristics of water level,discharge,flow velocity,specific drop,etc.in the beach section through the unsteady mathematical model,and the influence of daily regulation on the flow conditions of Shaoqibei reach is obtained.The results show that under two kinds of daily regulation conditions,the unsteady flow from unsteady flow to Shaoqibei River has a certain influence on the flow conditions of the downstream channel and the control reach and maintenance facilities of the channel under the condition of unsteady flow from 1.01 m to 1.37 m.The influence on the channel's flow condition under 4.5 m daily variation is greater than 3.0 m.The analysis result provides support for further optimizing the hub shipping scheduling scheme and waterway maintenance measures.