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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Hydro-environment : Vegetated open channel flow for urban stormwater management: a review
Vegetated open channel flow for urban stormwater management: a review
Author : MUHAMMAD MUJAHID MUHAMMAD(1), KHAMARUZAMAN WAN YUSOF(2), MUHAMMAD RAZA UL MUSTAFA(3)
ABSTRACT
The presence of vegetation in urban stormwater waterways such as swales plays an important role from ecological point
of view as it can be used to improve water quality and reduce soil erosion by altering the flow magnitude. To understand
the hydrodynamics of vegetation, numerous types of synthetic materials were used to simulate vegetation roughness in
the past. Through this, numerous model equations were developed to predict the discharge, but the models were found
to overestimate the discharge when applied to a natural vegetated channel or constructed one such as swales. This
paper reviews some researches performed on vegetated open channels, which comprises the effects of vegetation
characteristics on flow, modeling of vegetative roughness and derivation of vegetal drag coefficient due to submerged
and emergent vegetation. Studies based on laboratory, field works and numerical modeling, have been reviewed based
on previous approaches by different researchers. The paper concludes with recommendations for future work in order to
improve the existing models for predicting vegetated roughness through the use of natural vegetation in combination of
both the interactions of submerged, emergent and floating types of vegetation which is less investigated by researchers.
For this reason, it remains questionable to precisely determine the optimum value of vegetative roughness for the
purpose of vegetated channel design.
File Size : 389,382 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Hydro-environment
Date Published : 20/08/2015
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