Unsteady flow sediment transport in a sewer model

被引：6

作者：

De Sutter, R ^{[1
]}

Huygens, M ^{[1
]}

Verhoeven, R ^{[1
]}

机构：

[1] State Univ Ghent, Hydrol Lab, B-9000 Ghent, Belgium

来源：

WATER SCIENCE AND TECHNOLOGY | 1999年 / 39卷 / 09期

关键词：

flume experiments; non-cohesive material; sediment transport; unsteady flow;

D O I：

10.2166/wst.1999.0457

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

To initiate a fundamental understanding of the complex nature of unsteady sediment transport phenomena, laboratory experiments for two types of non-cohesive material are presented. These experiments were performed in a test flume with semi-circular cross-section. Friction velocity for the transient regime is obtained using the equations of de Saint-Venant, which are rearranged using the kinematic flow principle. Inertia of bed load material and material in suspension causes a time and forme discrepancy between the unsteady friction velocity and transport. Hence the friction velocity obtained with a steady state formula is chosen as basic parameter to setup an instantaneous relationship with transport. A correction for the time lag is clearly a function of the unsteady character of the flow. (C) 1999 IAWQ Published by Elsevier Science Ltd. All rights reserved.

引用

页码：121 / 128

页数：8