Use of UKCP09 products for the project ‘Future flows and groundwater levels’

Prudhomme, Christel. 2012 Use of UKCP09 products for the project ‘Future flows and groundwater levels’. Wallingford, UK, NERC/Centre for Ecology & Hydrology, 15pp. (CEH Project Number: C04004, Science Report/Project Note: SC090016/PN1)

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This document describes the rationale behind the use of UKCP09 products within the future flows and groundwater projects. To ensure spatial consistency of the results and the generation of multi-decadal time series across Great Britain, the HadRM3-PPE daily time series are to be used to derive both national maps of changes in river flows statistics and daily time series of river flow and groundwater levels. Those transient river flow and groundwater level time series will enable investigating the evolution of the time series over time without having to interpolate linearly between fixed time periods and will provide multiple realisations of historic climate and flows, hence allowing a better understanding of climate variability and its impact. In addition, the changes in river flows and groundwater levels obtained from the time series will be put into the context of fuller climate change uncertainty as described by the UKCP09 probabilistic projections for a selected number of sites. To ensure data input are realistic as both fine spatial scale (typically 1-km) and temporal scale (daily), a downscaling incorporating bias correction is recommended for both precipitation and temporal time series. Snow-melt and evaporation processes are also accounted for using HadRM3-PPE climate information.

Item Type: Publication - Report
Programmes: CEH Topics & Objectives 2009 - 2012 > Water > WA Topic 1 - Variability and Change in Water Systems
CEH Topics & Objectives 2009 - 2012 > Water > WA Topic 3 - Science for Water Management
UKCEH and CEH Sections/Science Areas: Reynard
Funders/Sponsors: Environment Agency, UK Water Industry Research, Defra, Wallingford HydroSolutions Ltd
Additional Information. Not used in RCUK Gateway to Research.: Available online - click on Official URL link for full text
Additional Keywords: UKCP09, bias correction, potential evapotranspiration, spatial coherence, gridded data, time series, regional climate model, HadRM3-PPE, climate change, hydrology, climate change impact study
NORA Subject Terms: Hydrology
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Date made live: 26 Jan 2012 11:16 +0 (UTC)

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