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Owing to increasing pressure of population there is an excessive demand of lands both in agriculture and non-agriculture purposes. This has resulted in vast stretches of waste land such as degraded land, soil salinity, water logging, desertification, soil erosion etc.; decrease in per capita cultivable land beside ecological imbalances. The pilot studies were carried out by NRSA and evaluated by different experts, and it was decided that the waste land maps on 1:50000 scales depicting the village boundaries were considered to be adequate for reclamation purpose. At present, the new techniques like remote sensing and GIS are used to delineate waste lands, faster and also produce better results. Current study, choose the study area of Gadilam river sub basin falling in Cuddalore and Villupuram districts. Gadilam is one of the sub-basin of Ponnaiyar basin. Main goal of the study examined the role of remote sensing and GIS for the identification of wasteland and to convert the wasteland into fertile land. Study conducted, and various data collected at different levels related to rainfall, control well details, water quality etc. Satellite imagery of the study area is also collected and interpreted. Furthermore, the maps like geology, soil are also collected. Geomorphology, land use, lineament, waste land were generated from satellite imagery. By overlaying the various thematic maps, wastelands and wasteland categories are identified. With the help of ground water wastelands of this study area is to be converted into fertile land.

Application Of Remote Sensing And GIS in the Identification of Waste Land in Gadilam Lower Sub Basin Of Ponnaiyar Basin in Cuddalore District