Flood Hazards Mapping of Mandakini River Basin of Odisha using Remote Sensing and Geo-spatial Information System
Flood is one of the most common natural hazards occurring in Orissa affecting many of the districts in Orissa particularly the coastal Orissa. Millions of Population affected by the floods followed by losses of human lives, agriculture, public infrastructure and private properties etc. ‘Since 2003, the state of Orissa has been a regular victim of recurring floods. Of these years, the high floods come in 2001, 2003, 2006, 2007, 2008 and 2011. Given this backdrop, the state was affected by flood yet in July 2009 due to heavy precipitation.The state also experience flood in the hilly district Nabarangapur due to heavy rainfall.
The Mandakini River Basin is located in the Districts of Khurdha and Nayagarh at latitude 19° 56’ 22” to 20° 11’ 15” North and 84° 10’ 48” to 85° 34’ 10” East. In this paper a methodology for the identification of flood hazard and flood risk areas will be discussed for the land use planning and flood management. For this purpose GIS (Arc GIS 9.3)and Remotesensing (Erdas Imagine 9.0)software has been used for the data management and analysis. Data layer includes annual rainfall (Isohyets) Watershed Boundary, Slope and gradient of the Watershed, Drainage, landuse-landcover, Soil, Geomorphology, Infrastructure and population data (2001) and Village Boundary.3D analyst, Spatial and Geostatistical tools are used for the analysis. The result shows the flood hazard area with different probability to prepare the flood hazard map. The result will be helpful for the landuse planning and the flood management.