水利学报Issue(7)：800-809,10.
非恒定流作用下砾石推移质输移特性试验研究
Experimental study on gravel bed-load transport in unsteady flow
摘要
Abstract
Based on the change rate of water depth and discharge, dimensionless parameter P reflecting the unsteadiness of unsteady flow has been proposed. The gravel bed-load transport in unsteady flow was ex-perimentally investigated with the synchronous test system of unsteady flow sediment transport. Test data analysis shows that bed-load transport under unsteady flow displays randomicity, intermittency and parox-ysm. Unsteadiness has effects on pulsation of peak for sediment transport rate. In the case of unsteady flow with strong unsteadiness,i.e. P>0.32,if samples of sediment transport rate are less than 20,the outcome will be deviated. The variation of sediment transport rate under unsteady flow does not synchronize with flow condition,and also relates to unsteadiness. When P>0.32,the peak of sediment transport rate usually lags behind the peak of flow velocity;while P<0.32, the peak of sediment transport rate perhaps occurs before the peak of flow velocity. Bed-load average transport rate (or bed-load yield) in unsteady flow is re-lated to discharge per unit width (or runoff) and unsteadiness parameter P,and increases as P strengthens.关键词
非恒定流/非恒定强度参数/砾石推移质/输移特性/水槽试验Key words
unsteady flow/unsteadiness parameter/gravel bed-load/transport characteristics/flume experi-ment分类
建筑与水利引用本文复制引用
马爱兴,陆永军,陆彦,黄廷杰..非恒定流作用下砾石推移质输移特性试验研究[J].水利学报,2013,(7):800-809,10.基金项目
国家重点基础研究发展计划（973）资助项目（2012CB417002）；国家自然科学基金资助项目 （）
