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Geographical Information System in flood management – A case study on river configuration

S.C.Gupta & G.P.Mathur

Floods have become an unfailing annual event in many of the major river basins all over the world and India is no exception. Efforts to achieve effective flood management have used a variety of structural as well as non-structural measures. The river Yamuna in its middle reach from Tajewala to Okhla has been frequently attacking both banks causing at times inundation of large areas. The devastating floods of 1978 caused large scale breaches in embankments on both banks subjecting half a million population to heavy suffering and entire loss of Kharif crop. The study has been taken up in this reach to understand the river behavior during monsoon and non-monsoon season. Use of satellite data and Geographic Information System techniques have been employed to achieve the desired results from the study. It was found that active river channel during 1989-90 has deviated at many places when compared with old river course of 1965-70. In one of the reach appreciable meandering was noticed requiring detailed Geo-morphological studies. The Indian Remote Sensing Satellite Data have been found to be useful in mapping the river meandering during non flood season.
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