Quantitative estimation of shoreline change using Remote Sensing and GIS for South Andaman Island, India

Shoreline is a most important linear feature on the Earth surface and it presents dynamic in nature. South Andaman Coastal region has geomorphologically complex processes, such as erosion-accretion, landslides, subsidence and tidal inundation hazard. Multiyear shoreline mapping is considered a valuable task for coastal monitoring and assessment. This paper presents detection of shoreline change and estimation of erosion and accretion along the eastern coast of the South Andaman. The SOI toposheet 1979, IRS 1D 1998 and IRS P6 2009 satellite pictures were used to delineate the shoreline changes. The results revealed that there is a greatest value of erosion over 30 years of studying. In order to obtain detail study the result was divided into two sections. In the year 1979–1998 the erosion was estimated about 706.2 ha in the both section and the accretion was estimated about 43.6 ha. During 1998–2009 the total erosion was observed 175.99 ha and the accretion is about 190.59 ha. In this period of eleven years the accretion is taken more than the erosion.