The University of Southampton
University of Southampton Institutional Repository

A comparison of gauge and radar precipitation data for simulating an extreme hydrological event in the Severn Uplands, UK

Biggs, Eloise M. and Atkinson, Peter M. (2010) A comparison of gauge and radar precipitation data for simulating an extreme hydrological event in the Severn Uplands, UK Hydrological Processes, 25, (5), pp. 795-810. (doi:10.1002/hyp.7869).

Record type: Article

Abstract

This paper provides a comparison of gauge and radar precipitation data sources during an extreme hydrological event. November–December 2006 was selected as a time period of intense rainfall and large river flows for the Severn Uplands, an upland catchment in the United Kingdom. A comparison between gauge and radar precipitation time-series records for the event indicated discrepancies between data sources, particularly in areas of higher elevation. The HEC-HMS rainfall-runoff model was selected to assess the accuracy of the precipitation to simulate river flows for the extreme event. Gauge, radar and gauge-corrected radar rainfall were used as model inputs. Universal cokriging was used to geostatistically interpolate gauge data with radar and elevation data as covariates. This interpolated layer was used to calculate the mean-field bias and correct the radar composites. Results indicated that gauge- and gauge-corrected radar-driven models replicated flows adequately for the extreme event. Gauge-corrected flow predictions produced an increase in flow prediction accuracy when compared with the raw radar, yet predictions were comparative in accuracy to those using the interpolated gauge network. Subsequent investigations suggested this was due to an adequate spatial and temporal resolution of the precipitation gauge network within the Severn Uplands. Results suggested that the six rain gauges could adequately represent precipitation variability of the Severn Uplands to predict flows at an approximately equal accuracy to that obtained by radar. Temporally, radar produced an increase in flow prediction accuracy in mountainous reaches once the gauge time step was in excessive of an hourly interval.

Full text not available from this repository.

More information

Published date: 7 October 2010
Keywords: radar, nimrod, precipitation, gauge, severn uplands, hec-hms, cokriging

Identifiers

Local EPrints ID: 165639
URI: http://eprints.soton.ac.uk/id/eprint/165639
ISSN: 1099-1085
PURE UUID: 0f465544-a7b5-446d-9a1e-fc5c9f0a58f6

Catalogue record

Date deposited: 19 Oct 2010 09:24
Last modified: 18 Jul 2017 12:27

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×