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A study was undertaken to identify in the irrigational suitability of groundwater in the cuddalore district (coastal part), Tamil Nadu, India. An entire study, 132 shallow and deep groundwater samples was gathered during Pre monsoon period (PRM) year of 2017 and post monsoon (POM) period samples collected year of 2018. Rock water interaction, silicate weathering and domestic waste are dominant sources for the water quality in the study area. The groundwater classification and irrigational suitability of groundwater were performed for both seasons. From the results of Chloro-Alkaline Indices (CAI I), and Chloro-Alkaline Indices (CAI II), during both seasons and classes, the direct ions exchange processes are predominant when compare with reverse ions exchange processes. The r

The main objective of the study is to identify groundwater potential zones in the hard rocks area of the Upper Gadilam river basin in Vizhupuram district of Tamil Nadu. The study area lies between North Latitudes 11°40’ to 11° 58’ N and East Longitudes 78° 58’ to 79° 26’ 35” E. The drainage pattern in the area is dendritic to sub dendritic and at complex as trellis type. Based on drainage pattern, the study area has been divided into two watersheds viz., Gadilam watershed, and SeshaNadi watershed. The Gadilam stream is originate from MayanurGarudan spring of Garudan rock and traverses via.Pasarhill and Damal village before reaching the sedimentary contact near Thirunavalur. SeshaNadi is an ephemeral stream which is found almost to be dry throughout the year, excepting the surface water flow for few days in a year during rainy season. Hydrogeological, Geophysical studies has been carried out in the above aquifer. As a result the total groundwater abstraction has considerably gone up causing an overall decline of regional piezometric heads in this water table aquifer. With an integrated approach on using Remote Sensing and Geographical Information System (GIS). Topographic map has been used to prepare base map and generate thematic maps like geology, geomorphology, lineament and lineament density, drainage, drainage density, and slope maps has been prepared for the study area. A number of geomorphic units such as Inselberg, moderately buried pediplain, Pediment, Inselber complex, Pediplain, and Pediment Valley has been observed. A composite groundwater potential map has been generated as very high, high, medium, low and very low based on the groundwater availability in study area. The upper, middle and downstream of the basins have been identified as potential zones for groundwater exploration. The regions of lineaments and intersecting lineaments proved for groundwater potential zones. The data generated subjected to validate with field checks

An attempt has been made to assess the groundwater recharge potential zones in Upper Manimuktha sub basin, Vellar river, Tamil Nadu. Groundwater recharge denotes to the entry of water from the unsaturated zone into the saturated zone below the water table surface, together with the associated movement away from the water table within the saturated zone. This study mainly focus the many factors that control the occurrence and movement of groundwater in a hardrock region including topography, Geology, lineament, drainage patterns, land use/land cover, slope and soil. Using remote sensing and Geographic Information System it is possible to take number of different thematic maps of the area and overlay form a new integrated layer. The integrated map reveals about the groundwater recharge potential zones of the area and classified into five categories which represents very low to Very good Groundwater Recharge Potential Zones (GWRPZ). Downstream areas as well as waterbodies fall in the very high GWRPZ (12.4 km2) indicates high infiltration and low runoff. Then followed by high GWRPZ (115.74 km2) indicate these area maximum covered by agricultural land (57.99 km2) as well as fallow land (85.41 km2), so the infiltration high. In the poor (125.28 km2) and very low GWRPZ (82.61 km2) mainly fall in the hilly terrain as well as in the waste, barren and buildup land of the study area. Based on the GWRPZ study indicate 34.4 % of the rainwater infiltrate in the ground of the entire study area.