摘要
本文描述了复式断面河流洪水的水流特性，并用流体力学的基本理论加以论证．在各国学者对复式断面洪水研究成果的基础上，建立了新的能量耗散的理论模型．
The river flow is frequently contained by the main channel. However,during flood eventsthe flow spills over onto the floodplain, resulting in a cross section consisting of a deep and narrow main channel overlain by wide and shallow floodplains.The viscous flow consumes a largeamount of energy in the main channel of the flood flow.The energy loss in the main channelconsists of two parts.One is due to the changes of the flow structure,another is caused by theeddies near the demarcation between the main channel and the floodplain.The energy consumedby the eddies is predominantly transferred from the flow in the main channel. The dischargedistribution between the main channel and the floodplain is determined by the energy loss whichcan be expressed by flow resistance coefficient. The characteristics of the flood flow are demonstrated by using the theory of fluid mechanics and a new model of the energy loss in the floodflow is advanced in this paper.
出处
《泥沙研究》
CSCD
北大核心
1995年第1期16-21,共6页
Journal of Sediment Research
关键词
复式断面洪水
过水能力
滩槽交界面
能量损失
水流特性
Flood flow in a compound cross-section,Discharge capacity,Demarcation between the main channel and the floodplain:Energy loss.
