comprehensive watershed management

7/30/2019 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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comprehensive watershed management

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