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A technique for the calibration of hydraulic models using uncertain satellite observations of flood extent
School of Geographical Sciences, University of Bristol, University Road, Bristol BS8 1SS, UK.ORCID-id: 0000-0002-8180-4996
2009 (Engelska)Ingår i: Journal of Hydrology, ISSN 0022-1694, E-ISSN 1879-2707, Vol. 367, nr 3-4, s. 276-282Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

This paper presents a methodology to calibrate hydraulic models using possibility of inundation maps derived from satellite imagery. The study was performed on a river reach of the Lower Dee, UK, where a coarse resolution image (ENVISAT ASAR) and high resolution satellite image (ERS-2 SAR) were acquired at the same time during the December 2006 flood event. Ten different flood extent maps were derived from the two flood images by using five different procedures to process these data. These flood extent maps were used to perform a sensitivity analysis of a simple raster-based inundation model (LISFLOOD-FP). The sensitivity analysis enabled us to investigate the capability of the two different resolution images to calibrate the friction parameters of the flood inundation model. The analysis showed that the optimal parameters of the model depend on the type of satellite image used to evaluate the model as well as on the particular procedure used to derive the flood extent map. Finally, the study developed a novel methodology to calibrate flood inundation models by comparing the model results to a possibility of inundation map obtained by combining the ten different flood extent maps.

Ort, förlag, år, upplaga, sidor
2009. Vol. 367, nr 3-4, s. 276-282
Nationell ämneskategori
Oceanografi, hydrologi och vattenresurser
Identifikatorer
URN: urn:nbn:se:uu:diva-219814DOI: 10.1016/j.jhydrol.2009.01.020OAI: oai:DiVA.org:uu-219814DiVA, id: diva2:703191
Tillgänglig från: 2014-03-05 Skapad: 2014-03-05 Senast uppdaterad: 2018-01-11Bibliografiskt granskad

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