By S M Ramasamy, The author is a Distinguished Professor, Dept. of Geology, Alagappa University, Karaikudi
Issue - The GIS Special Issue
Date - 16th October 2018
Flood is a complex outcome of an interface between geological, physiographical, hydrological, meteorological and anthropogenic dynamics. It mandates high computational techniques for the analysis of a large volume of hierarchical pictorial data. GIS technology, inseparably interleaved with remote sensing, helps to panoramically beam complex issues involving river floods and the feasibility of detecting and mitigating them.
Floods have now started occurring everywhere including hills, plains and river valleys, urban agglomerations and even the deserts of Rajasthan. Barely could the subcontinent overcome the shock and grief of the Uttarakhand floods (2013) when a massive flood inundated a large part of the Chennai metropolis in 2015 killing 470 people and affecting the lives of more than 3.3 million families (PTI, 2016). The latest disaster occurred in Kerala during August 2018 and ravaged the State with a loss of...