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Section I

Flow Modelling of Mahaweli River Reach with the Riverbed Intake of Udunuwara-Yatinuwara Water Supply Scheme

Authors:

K. H. S .S. Karunanayake ,

National Water Supply and Drainage Board, LK
About K. H. S .S.

Engineer

BSc Eng. (Peradeniya), MSc Eng. (Peradeniya)

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S. B. Weerakoon

University of Peradeniya, LK
About S. B.

Senior Lecturer in Civil Engineering

BSc Eng. (Peradeniya), M.Eng. (Tokyo), D.Eng. (Tokyo), C.Eng., MIE(SL), MSLAAS

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Abstract

The Udunuwara-Yatinuwara water supply scheme of the National Water Supply and Drainage Board abstracts water through a riverbed filtration system located in a bifurcated channel of the Mahaweli River at Peradeniya. The diverted flow through the channel has become inadequate to supply the abstraction demand during the periods of low river flow. The flow pattern in the river and the discharge through the channel are investigated by the application of a two-dimensional depth-averaged flow computational model to a 450 m long river reach including the channel. The model was set up, calibrated and verified for the reach using measurements carried out at the site. The model was applied to ascertain the possibility of increasing the flow through the channel during low flow in the river by changing the river bed level in the reach.
How to Cite: Karunanayake, K.H.S.S. & Weerakoon, S.B., (2007). Flow Modelling of Mahaweli River Reach with the Riverbed Intake of Udunuwara-Yatinuwara Water Supply Scheme. Engineer: Journal of the Institution of Engineers, Sri Lanka. 40(4), pp.129–133. DOI: http://doi.org/10.4038/engineer.v40i4.7164
Published on 30 Oct 2007.
Peer Reviewed

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