Analysis of space-borne data for coastal zone information extraction of Goa Coast, India

Abstract

Space-borne data covering the coastal zone of Goa State were processed using digital and visual image-processing techniques to extract information about the coastal zone. Digital image processing of thematic data included principal component analysis and Intensity-Modulated Pseudo Biomass imaging. SPOT image and aerial photographs of the coastal zone of Goa were analyzed, and fluvial, estuarine, marine, vegetational, and nearshore features were identified and mapped. This study reveals that the coastal, sandy tracts are accreting and stable, whereas rocky cliffs and promontories are subject to constant erosion. Four turbid water masses were identified on the basis of tonal variations; the pattern of sediment plumes indicated a southerly littoral drift. Finally, this study demonstrated the utility of extracted coastal information to coastal zone managers