摘要
本文分析了三门峡水库渭河下游实测资料 ,认为前期淤积使潼关河段同流量流速降低 ,使渭河下游主槽过洪能力减小、洪水流速降低。而洪水是维持潼关及渭河下游动态冲淤平衡的动力 ,因此前期淤积是造成渭河下游淤积上延严重的根本原因。流速降低破坏了渭河干流推移质和支流推移质进入渭河后的输沙平衡 ,这也是渭河下游淤积上延严重的原因之一。
Based the theoretical foundations of fluvial process, the mechanism of backwater deposits extended upstream of Sanmenxia Reservoir in Weihe River has been analyzed. Sedimentation in forward period decreased the Tongguan reach flow velocity with the same discharge, decreased the main channel width and the flood conveying capacity in lower Weihe River. So that the power for keep the fluvial equilibrium has been decreased. It is the fundamental reason that created the backwater deposits extended upstream and serious sedimentation in channel occurred.\;The bed load of branch stream into the Weihe River increased the backwater deposits extended upstream.
出处
《泥沙研究》
CSCD
北大核心
2001年第2期37-40,共4页
Journal of Sediment Research
