WATER RESOURCE CONSERVATION PLANNING FOR MICRO-WATERSHED OF DEVANAYAKANAHALLI IN TUMKUR DISTRICT USING GEOSPATIAL TECHNOLOGY
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Date
2019-08-07
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UNIVERSITY OF AGRICULTURAL SCIENCES GKVK, BANGALORE
Abstract
Geospatial technique were used for land and water management action plan for
Devanayakanahalli micro-watershed lies between 760 39' 43'' to 760 41' 17'' E longitudes
and 130 4' 54'' to 130 6' 29'' N latitudes in Tumkur district, Karnataka. Arc GIS software
was used in evaluation of morphological characteristics of the micro-watershed. The
present study reveals that drainage pattern was dendritic with trunk order 3. The area,
maximum length and width of the micro-watershed are 453 ha, 3.18 km and 1.23 km
respectively. The mean value of bifurcation ratio was 2.20, it indicates micro-watershed
had suffered less structural disturbance. The value of drainage density 2.30 km km-2 which
shows that the region having permeable subsoil material. The value of form factor
illustrates micro-watershed was elongated in shape. The study was used to prepare the
thematic maps of land use/land cover, soil, slope and drainage using satellite imagery data
and Survey of India (SoI) toposheet of micro-watershed and to integrate all the maps under
GIS environment to prepare the water resource management plans for micro-watershed.
The study will be helpful in identification of sites for construction of different soil and
water conservation structures. Thus, the results shows that 38.14 per cent of the total area
is ideal for constructing check dam, 20.97 per cent farm pond and 13.40 per cent for
percolation pond which helps in sustainable development of the natural resources of the
micro-watershed with the proper implementation of the proposed action plans.