Comprehensive Watershed Management
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Transcript of Comprehensive Watershed Management
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INDRADIP MITRA.
PGBSC(Apllied) GIS & REMOTE
SENSING
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STUDY AREA :--
BANKURA DISTRICT,
WEST BENGAL
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D.K.PAL, D.CHAKRABORTY,R.K.DAS, A.MONDAL, S.SENGUPTA
AND
B.DUTTA.
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What is Watershed
Management
???
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It is defined as the land area from which
water drains to a given point. In other
words watershed is an area from whichrunoff, resulting from precipitation, flows
past a single point into a stream. Since
water is drained off to a given point, the
management of watershed in point of view
of Hydrology is easily possible. Hence, wecan arrive to another definition of watershed
i.e. "watershed is a manageable
Hydrological Unit".
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Abstract : --
The study deals with
Comprehensive Watershed
Management with the aid of
semi detail deliberation of
soil resource and land use /land cover over an area. The
study aims at
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1. Inventing soil resources which
are one of the most crutial lifesupporting entities for awatershed.
2. Deriving the level of relativewisdom in the status of land
utilization in the watersheds.
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River :- Silai
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River Silai, Garhbeta, West Bengal
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In a nutshell efforts were LISS IIwere used for the study area. Two
small watersheds namely Silai(Silavati) Upperand Silai(Silavati)
Lowerwere chosen as study area.Each occupies an area of 28775 haand 32319 ha respectively. The five
category segmentation ofwatersheds on sustainableutilization of soils revealed a very
encouraging trend for Silai Lower.
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Contd.
The other watershed Silai uppershowed a mixed trend but the
category. i.e. very good use portion
had a marked rise for both thewatersheds as time progressed. On
the whole the results demonstrated
that with the passage of time therehas been an overall change for the
better land utilization.
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Data used --
IRS 1A / 1B LIS II data used.
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Methodology : --
Land use / land cover
mapping of soil resourcesanalysis of soilscape vis a
vis current land use, GIS
slw technology used.
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In order to achieve comprehensivewatershed management efforts aremade throughout the course to generatethe necessary scientific inputs towardsoptimum developments of watershedsRemote Sensing has been used as a toolto generates these inputs that can beused by the watershed manager forsustainable development of watershed.
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Thus we find that GIS & Remote
Sensing can be very efficient tool in the
process of watershed management. Theadvantages of GIS & Remote Sensing
are the fact that they are less time
consuming and provide accurate
results. However the high cost of the
typical GIS softwares like Arc GIS and
ERDAS and the satellite data have
limited their use in the low funded
project.
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