摘要
水沙条件对冲积河流河道演变起着至关重要的作用,典型水沙因子的选取及其对河床冲淤的影响是河流地貌及河流工程学科的重点,影响着河相关系的研究进展。历年来,不同领域的学者开展了大量相关研究,取得了丰硕成果。分别从流量、含沙量以及水沙组合3方面对水沙因子指标的研究现状进行了总结分析。结果表明:早期学者多以流量或者含沙量单一影响因子对河道冲淤变化规律进行讨论研究,后续研究发现单一影响因子与河床形态没能形成稳定的对应关系,进而指出河床冲淤受水沙组合关系的影响。近期一些水沙组合指标的提出,对滩槽冲淤的定量研究起到了重大作用。类似研究目前多集中在大江大河,较为成熟的研究成果多是以黄河流域为研究对象,在其它流域的应用及修正有待更深入的开展。
Flow and sediment conditions play a vital role in the channel evolution of alluvial river,the selection of typical flow-sediment factors and their influence on riverbed erosion and siltation are the focus of river geomorphology and river engineering disciplines, and the research progress of river-phase relationship. Over the years, the scholars in different sectors carried out larger amount of research work and achieved rich achievements. This paper summarizes the research status of flow and sediment factor indicators from three aspects of discharge, sediment content and flow-sediment combination. The conclusion shows that: early scholars mostly discussed the changes of river channel erosion and siltation by a single influence factor of flow or sediment,and the follow-up research discovered that there is no stable correlation between single factor and river geomorphology and the riverbed erosion and siltation are affected by flow and sediment collocation. Recently, some proposed flow-sediment collocation indicators have played a significant role in the quantitative study of beach and channel erosion and siltation. At present, similar studies are mostly concentrated in large rivers, but the more mature research results are mostly based on the Yellow River Basin, so the application and revision in other watersheds need to be further developed.
作者
谢炎
刘亚
范北林
XIE Yan;LIU Ya;FAN Beilin(Key Laboratory of River Regulation and Flood Control of MWR,Yangtze River Scientific Research Institute,Wuhan 430010,China)
出处
《人民长江》
北大核心
2019年第10期32-36,共5页
Yangtze River
基金
国家自然科学基金青年科学基金项目“弯曲分汊河道演变时空差异特性研究”(51609011)
三峡后续规划课题3(CKSG2017889/HL)
关键词
河床演变
水沙因子
流量
含沙量
水沙组合
冲积河流
riverbed evolution
water sediment factors
flow
sediment concentration
water and sediment collocation
alluvial river
