The effects of vegetation on longitudinal dispersion

被引：94

作者：

Nepf, HM

Mugnier, CG

Zavistoski, RA

机构：

[1] Parsons Laboratory, Dept. of Civ. and Environ. Eng., MIT, Cambridge

来源：

ESTUARINE COASTAL AND SHELF SCIENCE | 1997年 / 44卷 / 06期

基金：

美国国家科学基金会;

关键词：

dispersion; marsh vegetation; dispersal phenomena; marine pollution; transport;

D O I：

10.1006/ecss.1996.0169

中图分类号：

Q17 [水生生物学];

学科分类号：

071004 ;

摘要：

The influence of vegetation on longitudinal dispersion was studied in a laboratory flume for three flow velocities and three plant population densities. Rhodamine was injected continuously upstream of the dowel array and sampled at mio positions downstream. The dispersion coefficient was estimated by fitting the concentration time series at the final downstream station. Enhanced turbulence as well as diminished vertical shear resulted in a lower dispersion coefficient when the plants were present. In addition, recirculation zones behind I ach stem trapped and delayed a fraction of the mass, enhancing the longitudinal dispersion and creating significant frontal delay. (C) 1997 Academic Press Limited.

引用

页码：675 / 684

页数：10

共 23 条

[1] THE DISPERSION OF MARKED FLUID IN TURBULENT SHEAR FLOW [J].