Mapping of spatial and temporal variation of shoreline in Poompuhar using comprehensive approach

Abstract

<span style="font-size:11.0pt;font-family:" times="" new="" roman";="" mso-fareast-font-family:"times="" roman";mso-bidi-font-family:mangal;="" mso-ansi-language:en-in;mso-fareast-language:en-us;mso-bidi-language:hi"="">Survey of India topographic map, Remote Sensing satellite imageries, NHO-Chart, GSI maps and ground-truthing data collected by Tamil Nadu PWD over the past four decades have been used to extract the shoreline during the various periods. In addition NIOT has marked the High Tide Line (HTL) during the years 2006 and 2013 which gives real time information on the behaviour of the shoreline. Data is processed and analyzed using software ERDAS for image processing and Arc-GIS for geospatial analysis respectively. Rate of shoreline changes are estimated by overlay analysis in GIS environment. The influence of natural and anthropogenic processes along the coast which is found to modify the shoreline configuration has been analyzed.Shoreline has been mapped using Landsat satellite data andTamil Nadu PWD ground truthing data for 1990, 2000 and 2006. It is observed that the shoreline change is more than 30 meters between 1990 and 2006. Studies include linking the natural impacts due to geology of the region and coastal geomorphology influenced by the River Cauvery on the shoreline change.</span>