冲积河道冲刷过程中横向展宽的初步模拟  

Preliminary Simulation of Channel Lateral Widenning in Degradation of Alluvial Rivers

作　　者：夏军强[1] 袁欣[2] 王光谦[1] 

机构地区：[1]清华大学水电系,北京100084 [2]上海勘测设计研究院,上海200434

出　　处：《泥沙研究》2000年第6期16-24,共9页Journal of Sediment Research

基　　金：国家重点基础研究发展规划 (973)项目!(G19990 436 0 7)

摘　　要：本文首先描述了冲积河道横向展宽现象 ,分析了河岸横向冲刷、崩塌的机理及展宽原因。然后建立细沙河流一维非均匀悬移质泥沙数学模型 ,同时结合河道横向展宽模式 ,预测冲积河道冲刷过程中 ,粘性土组成的河岸的横向展宽过程。此外 ,还分析了不同来水来沙条件及河岸土体特性对河道横向展宽和河床冲刷的影响 ,指出了影响冲积河道横向展宽的主要因素。This paper firstly describes the phenomenon of channel widenning in degradation of alluvial rivers, explains the reasons and mechanism of channel widenning and analyzes the stability of cohesive soil river bank failure.Then by establishing a one\|dimensional mathematical river model of graded suspended sediments and incorporating a couputing pattern of channel lateral widenning, it predicts the process of channel widenning in degradation of an alluvial river. Moreover, this paper analyzes the effects of different inflow conditions and sediment conditions and different riverbank soil properties on channel widenning and bed degradation. Finally it also proposes the main effect factors.

关 键 词：冲积河道 河槽横向展宽 粘性河岸 

分 类 号：TV147[水利工程—水力学及河流动力学]