浑水灌区过渡段引水明渠恢复饱和系数沿程变化规律的分析研究

Analysis on Variation Law of Recovery Saturation Coefficient of DiversionOpen-Channel in Transition Section of Muddy Water Irrigation Area

针对浑水灌区渠首沉沙池前过渡段引水明渠存在的泥沙淤积问题,开展了泵站过渡段引水明渠水流泥沙运动特征的分析研究,给出了该区段非均匀沙各分组粒径级泥沙恢复饱和系数的量化确定方法,分析讨论了多种工况组合时,该区段非均匀沙各粒径级恢复饱和系数的变化特征,为过渡段泥沙输移的精准量化分析提供了依据,为过渡段渠道基于不淤设计的相关水力几何约束条件分析比选提供了方法和途径。

Focusing on the problem of sediment deposition in the transitional open channel in the front of desilting basin in muddy water irrigation area,the analysis and research on the characteristics of sediment movement in the transitional open channel of pumping station are carried out,and the quantitative determination method of the saturation recovery coefficient of non-uniform sediment in each particle size class in this section is proposed.The variation characteristics of the recovery saturation coefficient of the section under various working conditions are also analyzed and discussed.This work can provide a basis for the accurate quantitative analysis of sediment transport in the transition section which is also very helpful for analysis and comparison of relevant hydraulic geometric constraints based on nonsilting design in the transition section.