Evaluation of 1D and 2D numerical models for predicting river flood inundation

MS Horritt*, PD Bates

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

687 Citations (Scopus)

Abstract

1D and 2D models of flood hydraulics (HEC-RAS, LISFLOOD-FP and TELEMAC-2D) are tested on a 60 km reach of the river Severn, UK. Synoptic views of flood extent from radar remote sensing satellites have been acquired for flood events in 1998 and 2000. The three models are calibrated, using floodplain and channel friction as free parameters. against both the observed inundated area and records of downstream discharge. The predictive power of the models calibrated against inundation extent or discharge for one event can thus be measured using independent validation data for the second. The results show that for this reach both the HEC-RAS and TELEMAC-2D models can be calibrated against discharge or inundated area data and give good predictions of inundated a-rea. whereas the LISFLOOD-FP needs to be calibrated against independent inundated area data to produce acceptable results. The different predictive performances of the models stem from their different responses to changes in friction parameterisation. (C) 2002 Elsevier Science B.V. All rights reserved.

Original languageEnglish
Article numberPII S0022-1694(02)00121-X
Pages (from-to)87-99
Number of pages13
JournalJournal of Hydrology
Volume268
Issue number1-4
Publication statusPublished - 1 Nov 2002

Keywords

  • RESOLUTION
  • validation
  • ACTIVE CONTOUR MODEL
  • flood forecasting
  • calibration
  • modelling
  • RADAR IMAGERY
  • RASTER-BASED MODEL
  • remote sensing

Cite this