Grassed drainage channels – hydraulic resistance characteristics

Escarameia, M. and Gasowski, Y. and May, R. (2002) Grassed drainage channels – hydraulic resistance characteristics. Proceedings of the Institution of Civil Engineers - Water and Maritime Engineering, 154 (4). pp. 333-341.

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Abstract

Current methods of estimating the hydraulic resistance of grass were developed for the relatively high water depths in rivers and large channels, and for cultivars not common in UK. This paper describes work carried out for the determination of the hydraulic resistance of grass-lined drainage channels, with particular emphasis on shallow channels used for road drainage. Grass types that are common in UK, that have slow growth rates and are tolerant to salt and wet conditions were identified as suitable for drainage channels. Experimental work with natural grass led to the development of resistance formulae where the Manning’s n coefficient is dependent on the grass height and on the product of the velocity and hydraulic radius. Issues related to the construction and maintenance of grassed channels are also discussed in the paper.

Item Type: Article
Subjects: Water > Integrated catchment management
Water > General
Divisions: Water
Depositing User: Unnamed user with email i.services@hrwallingford.com
Date Deposited: 02 Apr 2020 09:46
Last Modified: 29 May 2020 14:21
URI: http://eprints.hrwallingford.com/id/eprint/480

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