The data set used for this study was acquired for the 1-in-150-
year flood that took place on the lower Severn around Tewkesbury,
UK, in July 2007 (Mason et al., 2010).This resulted in substantial
flooding of urban and rural areas, about 1500 homes in Tewkesbury
being flooded. Tewkesbury lies at the confluence of the Severn,
flowing in from the northwest, and the Avon, flowing in from the
northeast.