水库下游悬移质泥沙沿程恢复研究进展

水库下游悬移质泥沙沿程恢复是河流泥沙动力学研究的难点问题之一。对该问题的研究有助于推动学科发展,解决工程实践中的有关问题。针对此现状,归纳总结了平衡及不平衡输沙条件下悬移质浓度垂线分布、悬移质沿程恢复的天然河道实测资料分析和恢复饱和系数等方面的研究成果,认为在不平衡输沙条件下悬移质泥沙垂线分布研究及实测数据的获取、分析等方面还存在一定的不足。在此基础上,提出有必要进一步开展水库下游悬移质泥沙沿程恢复研究,特别是利用精准的测量仪器,开展科学合理、系统全面的水槽试验是丰富该研究成果的必要手段。

Research Advances in Recovery of Suspended Sediment Concentration Downstream of a Reservoir

Recovery of suspended sediment concentration along the river downstream of reservoir is a core subject in river dynamics research.The research in this area helps to push the advances of river dynamics and solve problems in engineering application.In this article,the research achievements of vertical distribution of sediment concentration under equilibrium and non-equilibrium transport conditions are summarized.The observed data of suspended sediment concentration recovery along natural channels and the research results of recovery saturation coefficient are also concluded.Research on vertical distribution of sediment concentration under non-equilibrium state is still defective.The methods of observed data acquisition and data analysis also need to be improved.Finally,scientific and systematic flume experiments with accurate measuring instruments should be conducted in further studies.