Geographical analysis

Abstract

Abstract In urban area flood is the most frequent hazard which destroys human lives directly and indirectly. It occurs when rapid accumulation and release of runoff water flows from up streams to down streams because of heavy rainfall. The geography of Dehradun demonstrated that it is situated at an altitude of 3350 meters and it is at the focal point of Doon Valley, farming part of Garhwal Himalayas. Extending from 29 °58' N and 31°2' N latitude and 77° 34' E and 78° 18'E longitudes. The aim of this study is to identify the physical vulnerability of buildings content and losses in residential area. With the help of questionnaires and base map prepared by ArcGIS software using satellite image Cartosat 1 with 2.5meter spatial resolution were used for this investigation. The primary data were collected through questionnaires, digital camera and GPS were used for field photography and for demarcating the coordinates. The aim of the field study is to collect data of the elements at risk. The study area is highly prone to natural hazards like earth quake, landslide and flood. Dehradun experiences heavy rainfall during monsoon season (from June to September). The study is carried out along the river side encroached by the migrated labourer class mostly from the outside of the regions.

Keywords: Flood, Vulnerability.