APPLICATION OF GEOINFORMATICS FOR GROUNDWATER PROSPECTS ZONES– A CASE STUDY FOR VANIYAR SUB BASIN OF PONNAIYAR RIVER IN SOUTH INDIA

S.Satheeshkumar; S. Venkateswaran; R.Kannan

Volume : VI, Issue : II, February - 2016

APPLICATION OF GEOINFORMATICS FOR GROUNDWATER PROSPECTS ZONES– A CASE STUDY FOR VANIYAR SUB BASIN OF PONNAIYAR RIVER IN SOUTH INDIA

S. Satheeshkumar, S. Venkateswaran, R. Kannan

Abstract :

<p>Groundwater prospect zones were delineated through the integration of the reclassified raster map layers of geomorphology, lineament and lineament density, drainage, slope percent, geology and soil type using the weighted overlay analysis in ArcGIS software. The spatial and non&ndash;spatial data on various terrain features have been generated using geospatial imageries, SOI toposheets, etc. an attempt to have been delineate groundwater Prospect zones were grouped in the study area into five classes and their distribution are very good, good, moderate, poor and very poor. The study area is underlain by massive Charnockite and followed by Epidote&ndash;HornblendeGneisses gneiss type of rock formations. Slope map shows steeper slopes in the south eastern and western part of the study area. Dendritic to sub&ndash;dendritic drainage pattern is dominant in the area, is often controlled by lineaments and fault zones. The upper, middle and downstream of the basins have been identified as prospect zones for groundwater exploration. The regions of lineaments and lineaments intersect point proved for groundwater potential zones. Major portion of the study area falls in the category &lsquo;moderate&rsquo; followed by &lsquo;good&rsquo;. The study results have been verified with field validation, The Groundwater prospect map of Vaniyar Sub Basin will be served as a base for further exploration using geophysical methods to locate potential well sites for the implementation of groundwater supply schemes.</p>