清水冲刷推移质输沙规律研究  

Study on bed load transport by clear water scouring

作　　者：程小兵[1] 王艳华[1] 乐培九[1] 

机构地区：[1]交通运输部天津水运工程科学研究所工程泥沙交通行业重点实验室,天津300456

出　　处：《水道港口》2011年第3期190-196,共7页Journal of Waterway and Harbor

基　　金：西部交通建设科技项目(200732822471)

摘　　要：根据恒定单一流量和恒定分级流量的清水冲刷水槽试验资料,采用相关分析方法对清水冲刷推移质输沙规律进行了分析研究。获得了有关变量的关系式,可用于预报推移质输沙率和输沙量在时间上和空间上的变化,也可用于预报推移质冲刷剖面在时间上的变化,计算结果与实测吻合良好。通过阶梯流量与恒定流量输沙规律的对比研究,分析认为推移质冲刷平衡剖面只与最大一级流量有关,与过程中流量大小及其持续时间长短无关。According to the flume experiment data of steady clear water scouring,the law of bed load transport by clear water scouring was studied with the method of correlation analysis. Then the related variable relationship was obtained ,which could be used to predict the time and spatial variations of bed load transport rate and discharge ,as well as the scour profile variation. The computed results were generally consistent with experimental results. According to the comparative study on bed load transport law of step discharge and constant flow,the results show that the equilibrium scour profile is only related to the maximum discharge,and it has nothing to do with the magnitude of discharge and duration time during the process.

关 键 词：清水冲刷 推移质输沙律 床沙粗化 相关分析 

分 类 号：TV142.2[水利工程—水力学及河流动力学] TV149