Print Email Facebook Twitter A spatial analysis of rainfall damage data using c-band weather radar images Title A spatial analysis of rainfall damage data using c-band weather radar images Author Spekkers, M.H. Kok, M. Clemens, F.H.L.R. Ten Veldhuis, J.A.E. Faculty Civil Engineering and Geosciences Department Water Management Date 2013-12-31 Abstract Intense rainfall may locally cause considerable damage in cities, e.g. because of sewer floods. A better understanding of relationships between rainfall characteristics and rainfall-related damage can help insurers and flood authorities to respond more adequately to rainfall extremes. This paper aims to study to what extent weather radars can be helpful to predict damage locations and characteristics. For the Netherlands, damage data were analysed based on daily insurance records. A database of C-band radar images was used to extract characteristics of rainfall events. These characteristics were linked to various damage statistics at district level and per day. Results are based on the 150 days with largest damage amounts nationwide. Rainfall and damage locations clearly showed similar spatial patterns when visualized on maps, particularly for the case maximum hourly rainfall intensity and rainfall volume. Through linear regression with log-transformed damage variables, highest correlation was found between claim ratio and maximum hourly rainfall intensity (r=0.38). The average damage per claim does not show any significant correlation with rainfall variables, except a weak relationship with maximum hourly rainfall intensity (r=0.12). This means that more intense rainfall mainly affects the number of households claiming damage, while it hardly influences the amount of damage per individual household. Subject extreme rainfallinsurance damage datapluvial floodingregression analysis To reference this document use: http://resolver.tudelft.nl/uuid:f0c17744-0609-4e93-b2fe-c5b8a24b7e4a Publisher Centre of Water Systems ISBN 978-0-95-39140-9-8 Source International conference on Flood Resilience (ICFR): Experiences in Asia and Europe, Exeter (United Kingdom) 5-7 Sept., 2013 Part of collection Institutional Repository Document type conference paper Rights (c) 2013 The Authors Files PDF 296132.pdf 643.13 KB Close viewer /islandora/object/uuid:f0c17744-0609-4e93-b2fe-c5b8a24b7e4a/datastream/OBJ/view