Online) An Open Access

ABSTRACT Ground water is being extracted mostly through bore wells in the area. Due to increase in number of bore wells over a period of time mostly for irrigation purpose, the depth to ground water levels have become deeper and deeper and touched more than 70 m bgl at certain locations. Ground water occurs mostly in fractured system which is in semi-confined to confined condition. The ground water is mostly suitable for domestic and irrigation purposes. The present study is an attempt to evaluate the groundwater system of Settikere area, Tumkur district. Hydrogeological investigations require an integrated approach. Though groundwater is replenish able natural resources, when withdrawals exceed the limits of dynamic recharge, it will cause irreversible damages. As in nature, South India is a hard rock terrain. In recent years, bore wells for agricultural purposes have been drilled on a massive scale by the farmers without carving for minimum interference distance to be maintained between the extraction structures. Thereby, groundwater levels are drastically affected. The present study suitable areas for groundwater potential zones in the region have been identified by using RS and GIS techniques

Studies of groundwater exploration in Chamarajanagar taluk, using electrical resistivity techniques, Chamarajanagar district, Karnataka, South India

The geophysical methods has been used for a number of applications particularly groundwater potential zone. There are four important techniques like gravity, magnetic, seismic, and geoelectrical prospecting methods are available. Electrical resistivity (Geoelectrical) methods are the most popular among them and its highest resolving power and economical viability. Electrical resistivity techniques to investigate the different lithological formations, bed rock dispositions, the depth to water table or zone of saturated formations, thickness of weathered zones, detection of fissures, fractures, fault zones, establishment of their depths, thickness and lateral extent of aquifers, groundwater flow directions, valley fills, depth to basement in hard rocks, fresh and salt water intrusions, groundwater prospective zones, for locating ore deposits and archaeological studies. In this area, electrical resistivity method has been worked to analyse geoelectrical parameter identification

Groundwater development studies using remote sensing and GIS techniques in drought prone area of Chamarajanagar district, Karnataka, India

While water supply is a crucial issue, there is an evidence to suggest that the quality of groundwater supplies is also under threat in recent years. This is the result of salinisation and increasing trend of groundwater exploitation and heterogeneous terrain condition of hard rock area posing major problem in groundwater exploration. Groundwater exploitation has been on the rise in Chamarajanagar district, Karnataka. Competing demands have grown in face of perennial water shortages, a situation which has been exaggerated by drought condition in the past decade. Integrated and environmentally sustainable development strategies have become inevitable for micro-level planning these days. Geographic Information System (GIS) was used for spatial analysis and integration. Geomedia Professional 5.1 GIS software was adopted in this process. The ranked maps were spatially integrated and the district area was divided into very good, good, moderate and low groundwater potential zones. Aquifer thickness map was generated by intersection of well inventory, sub-surface geological, geophysical and groundwater potential data. Based on aquifer thickness, aquifer was categorized into deep aquifer, shallow aquifer and moderately deep aquifer. By combining groundwater potential zone and aquifer thickness, the watershed area was reclassified into eleven priority zones, recommended for different agricultural practices, groundwaterdevelopment and management of aquifer recharge

Identification of groundwater potential zones through remote sensing and gis techniques in Kollegal taluk, Chamarajnagar District, Karnataka, India

Water recharge from land surfaces into subsurface media is an essential element in the hydrological cycle. For a small scale Groundwater assessment, experimental approaches are usually followed, however, on a regional scale, this groundwater assessment needs to be made into a comprehensive picture where spatial data of the different contributing factors are treated. Contributing factors are lineaments and drainage frequency density, lithologic character, landuse and landcover.This study is approach to better estimate and provide qualitative assessment of potential of the area influencing the groundwater conditions and it is very good in valley regions and in remaining it is moderate to poor. © 2011 CAFET-INNOVA TECHNICAL SOCIETY. All rights reserved