泥沙研究Issue(1)：67-73,7.
黄河上游孔兑高含沙洪水特点与冲淤特性
Scouring and silting characteristics of hyper-concentrated floods of ten tributaries of Upper Yellow River
摘要
Abstract
The hyper-concentrated floods from the ten tributaries emptide into the Inner-Mongolia Yellow River often cause dike break and channel plug in the lower reaches of the mainstream. The hyper-concentrated floods are characterized by high peak, large flood volume, high sediment concentration, sharp rising and dropping and short duration. The preliminary research shows the hyper-concentrated floods of those tributaries have strong capacity in sediment transport. The flow intensity needed to transport sediment does not increase with the sediment concentration, even to decline, when the sediment concentration is above 300kg/m . When the flood peak discharge is below 1 000m /s, sedimentation or scouring both can occur in the river channel. The adjustment of the cross-section is presented by the feature of scouring channel and silting floodplain. When the flood peak exceeds 1 000m /s, the whole river bed can be scoured, and the larger the flood peak is, the stronger the scouring becomes. The sediment carried into the mainstream by the floods can hardly be transported out of the Inner-Mongolia Yellow River, and thus becomes one of the main reasons for the channel shrinkage and reduction in flood and ice flood discharging capacity of the Inner-Mongolia Yellow River in recent years.关键词
孔兑/高含沙洪水/输沙能力/冲淤特性Key words
ten tributaries/ hyper-concentrated flood/ capacity of sediment transport/ characteristics of scouring and silting分类
建筑与水利引用本文复制引用
王平,侯素珍,张原锋,吴保生..黄河上游孔兑高含沙洪水特点与冲淤特性[J].泥沙研究,2013,(1):67-73,7.基金项目
国家重点基础研究发展计划(973计划)课题(2011 CB403304) （973计划）
"十二五"国家科技支撑计划项目(2012BAB02B03) （2012BAB02B03）
中央级公益性科研院所基本科研业务费专项(HKY-JBYW-2010-10) （HKY-JBYW-2010-10）
