摘要
本文将正交曲线坐标系下的平面二维水沙数学模型和粘性河岸的冲刷模型结合 ,用于模拟弯道内的水流运动、悬移质泥沙的输移、河床的纵向及横向变形 .用水槽试验资料验证了本文提出的水流模型 ,结果表明流速分布、水位等计算结果与实测值相当符合 .应用建立的水沙数学模型以及河岸冲刷模型 ,模拟了一概化弯道在持续清水冲刷下的主流线位置、断面形态、主槽比降的变化过程 。
A 2 D depth averaged mathematical model with curvilinear coordinates considering the erosion of riverbank is established to study the water flow,transportation of suspended sediment and deformation of riverbed in longitudinal and transverse directions in meandering rivers.The calculated velocity distribution and water level are in good agreement with the model test data.The model is applied to forecast the variation process of main stream direction,cross section and channel slope of a conceptualized curved river under the erosion of clear water.
出处
《水利学报》
EI
CSCD
北大核心
2002年第6期60-66,共7页
Journal of Hydraulic Engineering
基金
国家自然科学基金和水利部联合资助项目 (编号 :5 9890 2 0 0 )
关键词
河岸
冲刷
弯曲河道
水流
河床变形
数值模拟
横向变形
meandering river
2 D depth averaged flow and sediment model
bank erosion model
longitudinal and transverse bed deformation
