The use of existing reservoirs for flood alleviation

Hurford, A. and Ramsbottom, D. and Petrie, M. (2017) The use of existing reservoirs for flood alleviation. In: Flood & Coast 2017, 28-30 March 2017, Telford, UK. (Submitted)

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The move towards catchment flood management includes the retention of water in rivers catchments in order to reduce flood risks downstream. There are many existing dams and reservoirs in the UK that were designed for non-flood uses including water supply and hydropower. There is an opportunity to use some of these reservoirs for flood attenuation, particularly those that are no longer required for their original purpose. In Scotland, some reservoirs have already been handed over to local authorities and form part of flood management schemes. Following the severe floods of December 2015, Scottish Water (SW) is now exploring further opportunities for using their reservoirs for flood attenuation. In order to select reservoirs that may be suitable for flood attenuation, the reservoirs are screened using criteria that include their location relative to flood risk areas, reservoir volume, existing use and the scope for creating an effective volume for flood storage. Having identified reservoirs that may be suitable for flood attenuation, detailed studies are then carried out to investigate the feasibility for each reservoir. In some cases a flood storage volume can be created with minimal changes to the existing reservoirs. In other cases, more significant changes are needed, such as the construction of gated spillways. The detailed studies include utilising HR Wallingford’s OPTIONISE approach, which is used to develop operating rules that balance the different requirements of reservoir system performance including dam safety, water supply reliability, hydropower generation (where plants exist) and flood attenuation.

Item Type: Conference or Workshop Item (Paper)
Subjects: Floods > Dams and reservoirs
Floods > General
Divisions: Floods
Depositing User: Unnamed user with email
Date Deposited: 02 Apr 2020 09:53
Last Modified: 19 May 2020 15:17

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