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Spatial Decision Support System for Identification of Water Harvesting Structures Using GIS

Author(s): B. N. Malleswara Rao; N. V. Umamahesh

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Abstract: The importance of water is increasing in all sectors as the demand and needs of the population is growing. Along with surface water resources groundwater exploitation has reached peak levels. The groundwater levels are declining to deeper depths in many areas of country. Hence there is an urgent need to think of strategies for water conservation and management. Keeping this as an objective, the suitable site for water harvesting structures has been identified using an integrated approach of Remote Sensing and Geographic Information System (GIS) in the Khindsy lake watershed of Ramtek taluk of Nagpur district of central India. The decision support framework considers issues such as the impact of deforestation on stream flow, soil erosion and subsistence production. There is enormous data volume and complex criteria for the site selection of various water harvesting structures like check dams and percolation tanks that cause much more difficulty for decision making. GIS analytical functions can answer, “What is the optimal solution?” with respect to the user requirement. The methodology involves the preparation of Various thematic maps of study area like drainage map, contour map, slope map, land use/land cover maps from the SOI toposheets and IRS 1D LISS III imagery on 1: 50000 scale. Thematic maps like soil map and lineament density maps are gathered from NBSS & LUP, Nagpur. The thematic maps have been prepared using ArcInfo 7. 2. 1. The overlaying and query analysis of thematic layers has been carried out using ArcView 3. 2a. Querying analysis has been done as per the constraints given by IMSD (Integrated Mission for Sustainable Development) and other sources.


Year: 2005

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