ACTION PLAN PREPARATION (Medak Nala) AND IMPACT ASSESSMENT (Katangldda Nala) OF WATERSHEDS IN GULBARGA DISTRICT USING REMOTE SENSING AND GIS TECHNOLOGIES
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Date
2007-10-01
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University of Agricultural Sciences GKVK, Banglore
Abstract
Action plan preparation of Medak Nala watershed and impact assessment of
Katangidda Nala watershed were carried out using remote sensing and GIS
technologies. Satellite data of IRS- IC/ID for two seasons representing rabi
(December 8 and 10, 2000 PAN + LISS III merged) and summer (March 15, 2001
LISS III) were used for preparing thematic maps and suggesting action plans for
management of natural resources in Medak Nala watershed. Impact assessment of
IWDP programme in Katangidda Nala watershed was done using IRS IC/ID data
of LISS III image of December 11, 1997 (pre-treatment) and November 15, 2002
(post-treatment).
The water and agriculture resources action plans of Medak Nala watershed
were prepared by integrating the thematic maps such as land use/land cover, soil
resource inventory, hydro-geomorphology, slope etc. The results indicated that the
present land use of the watershed (5,169 ha, 42.58%) is under khan/crop followed
by rabi crop area (2,814 ha, 23.18%) and land with scrub (2,280 ha, 18.78%). The
20 soil series of the watershed were classified under Inceptisols, Alfisols, Vertisols
and Entisols. The hydro-geomorphology status of the watershed indicates that
major area is under plateau moderately dissected (5,200 ha, 42.83%) followed by
plateau slightly dissected (3,298 ha, 27.17%) and pediplain shallow (1,750 ha,
14.41%). The drainage network of the watershed resembles a dendritic pattern
with drainage density of 2.16 km/sq. km. Based on these conditions, the
watershed action plans were prepared. Water harvesting structures like boulder
checks (257), check dams (62), nala bunds (10), miner irrigations tanks (2), soil
conservation practices like contour farming, strip cropping and vegetative barriers
were suggested. In agriculture action plan, agro-horticulture (5,575, ha, 45.93%)
plays an important component followed by dryland- horticulture (2,725 ha,
22.45%) and fodder and fuel (2,290 ha, 18.86%)
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