Effects of bed material properties on cohesive sediment erosion

被引：83

作者：

Aberle, J

Nikora, V

Walters, R

机构：

[1] Tech Univ Braunschweig, Leichtweiss Inst Wasserbau, D-38108 Braunschweig, Germany

[2] Natl Inst Water & Atmospher Res, NIWA, Christchurch, New Zealand

来源：

MARINE GEOLOGY | 2004年 / 207卷 / 1-4期

关键词：

cohesive sediment; erosion rate; fine sediment transport; critical bed shear stress; mud;

D O I：

10.1016/j.margeo.2004.03.012

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

A straight benthic in situ flume was used to measure the erosion rate of cohesive sediments in freshwater and saltwater environments in New Zealand. The data show an exponential decay of erosion rate with time, which is indicative of depth-limited erosion. Two approaches for the calibration of an erosion formula are used, both leading to similar results. The data show the dependency of erosion rate on bed material properties, such as dry bulk density, water content, organic content and sand content. Both methodologies also highlight differences between data from freshwater and saltwater environments. Also shown is a requirement for direct measurements of bed density profiles and bed load transport during in situ investigations. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：83 / 93

页数：11

共 29 条

[1] Straight benthic flow-through flume for in situ measurement of cohesive sediment dynamics [J].