Flooding is one of the most universal natural hazards. Riverine floods are caused by precipitation over large areas or by melting of the winter’s accumulated snow, or by both. In fact, flooding is a natural hazard that is becoming a greater threat. TRMM and ALOS data have been useful for monitoring the event of floods. In this paper flooding along Kalpani River in Mardan district [34° 11/ N, 72° 03/] of Pakistan in August 2006 is considered as the case study. It was observed that the flood had occurred because of high intensity rains in the last week of July and first two weeks of August 2006 in the region, affecting 136 villages in the district. The extraordinary rains also had flushed Hoti Bridge over Kalpani River causing casualties and damage to local houses and infrastructure in the district. In this paper, using TRMM data, the rainfall intensity has been analyzed, from 1998 till 2006 for specific months of August for Mardan district. PALSAR (ALOS) images of pre-and-post flood events have been processed to determine the extent of flooding. Three polarizations HH, HV and HV combination of PALSAR images in RGB of post-and-pre flood could have effectively helped in distinguishing the wet areas in the affected district, but those were not available. PRISM (ALOS) data have been used for landuse / land cover map generation. SRTM (Shuttle Radar Topography Mission) derived DEM has been used to extract the low lying areas along Kalpani River and hence was treated as the area under flooding. |
Abstracts 
