There is growing interest in the research community to apply the various techniques pertaining to geospatial technology, with the advance part of Remote Sensing (RS) and Geographical Information System (GIS). This technology has been proven to be very essential in this identification and resolving the problem of water resource and allied water supply management. Considering the capabilities of geospatial techniques, the tools and techniques of similar disciplines used for gravity-based drinking water supply management in the hilly area where the human habitat is settled at foothill places. An attempt has been made in this paper to avail the use of tools and techniques of geospatial techniques for gravity-based water supply management at the village level. The Karule village is the part of central Maharashtra in India chosen for implementation of present bid. It was observed that, three-dimensional remote sensing data derived from space-borne satellite could be useful for gravity-based drinking water supply management with the help of other spatial and non-spatial database. Satellite-derived data and its incorporation with GIS and ground inventory data would be advantageous for delineation of such gravity-based water supply management in the similar area of world.
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On 26 December 2004, a tsunami severely affected almost all the coastal villages of Kanyakumari District, India. It was one of the worst affected coastal sectors of South India. An attempt has been made here to assess the impact of the tsunami hazard on coastal landforms and the level of inundation using GIS techniques. The areas of inundation were surveyed and mapped by fixing regular transects along the coastal regions. The percentage of inundated area in the total area was estimated. It was found that inundation was higher on low-lying coasts and relatively less on elevated coasts. In some cases, the extent of inundation was a few kilometres in relation to other coasts, but the percentage of inundated area in the total coastal area was high. The extent of inundation along the study area varied from 50 m to 450 m. Inundation was minimal in coastal villages like Kanyakumari, Agastheeswaram, Madhysoodhanapuram and Dharmapuram, but extensive at Colachel. The percentage of inundated area in the total area ranges from 8% (Dharmapuram) to 39% (Colachel). The degree of inundation was controlled by coastal geomorphological features such as sand dunes, cliffs, coastal vegetation, nature and configuration of the beach, not to mention the angle and velocity of the invading tsunami surge.
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