A new conveyance estimation system

Samuels, P.G. and Bramley, M. and Evans, E.P. (2007) A new conveyance estimation system. In: Annual Conference of River and Coastal Engineers 2002, July 2002, University of Keele, UK.

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Abstract

The estimation of conveyance is a core component of flood management, water level prediction and flood defence design. All river modelling software includes one or more methods for conveyance estimation, usually based upon methods dating from research completed more than 50 years ago with little or no account taken of recent advances in knowledge and understanding. In 2001 the Environment Agency commissioned a scoping study on reducing uncertainty in conveyance estimation. The paper describes some of the conclusions of that scoping study including the needs of different users, the diversity of current knowledge and provides the outline for a targeted programme of research to make a step forward in the management of river capacity. This Targeted Programme is now underway involving a partnership between academic researchers, experts and users. Particular issues of concern are the effects of riverine vegetation, the influence of natural shaped (and re-naturalised) channels and the interaction between river channels and flood plain flows. The output from the programme will be a new Conveyance Estimation System (CES) as open code and enabled for use within modelling packages. The CES includes a roughness advisor to provide access to the wide body of knowledge on the estimation of river resistance.

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