Flood Inundation Mapping of Savitri River Floods in and around Mahad Town (2005 & 2007 Storm Events) by Using GIS Tools, North Konkan, Maharashtra, India


Authors : Prashant P. Magar

Volume/Issue : Volume 5 - 2020, Issue 1 - January

Google Scholar : https://goo.gl/DF9R4u

Scribd : https://bit.ly/2uZeglV

This study is an attempt to map inundated area using geographic information systems (GIS) to obtain flood information for flood planning. Accurate information on flood inundation is essential for designing a sound planning and management. It provides the base line data required for proper understanding the extent and magnitude past and future flood events. Present paper deals with flood inundation mapping of Savitri river floods of 2005 and 2007 flood events. High flood level markings of 2005 and 2007 events were recorded to map the extent of floods. Separate flood inundation maps were created with the help of GIS for these flood events. Number of villages submerged and spatial extent of respective flood events have been computed. Construction of Konkan Railway Bridge across the main river channel with embankments over the narrow strip of floodplain has caused impounding of river water upstream to the bridge. Presence of island within Savitri and Gandhari River has also caused retention of flood water. Tidal bore during high tide is another reason of over bank flooding. Urbanization also influenced the increasing water level in the river channel. Unplanned and rapid settlement development, uncontrolled construction of buildings in general and major land use changes are some of the major reasons of flooding in and around Mahad town during 2005 and 2007 flood events.

Keywords : Digitization, Embankment, Floods, Floodplain, Georeference, Inundation, Stream Gauge.

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