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Application of PALSAR, PRISM & TRMM Data for Flood Monitoring in Pakistan’s Mardan District

Rahmatullah Jilani(1), Haq Matee(1), Siraj Munir(1) and Paras Sidiqui(1)

(1) SUPARCO, Sector 28, Gulzar-e-Hijri, Off University Road, Karachi, 75270, Pakistan

Abstract

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 accumulation of 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 in Mardan district [34deg 11' N, 72deg 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 first two weeks of August 2006 in the region, 136 villages were affected in the district. The extraordinary rains also had flushed a bridge causing sever damage in the district. In this paper using TRMM data, the severity of rainfall intensity has been analyzed, from 1998 till 2007 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. PRISM (ALOS) data were also used for identifying low lying areas in this district. Three polarizations HH, HV and HV combination of PALSAR post flood images in RGB combination could have effectively helped to distinguish the wet areas in the affected district.

Keywords: Torrential rains, TRMM, Flood, PALSAR, PRISM, Mardan

 

 

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