Report

Land Resource and Hydrological Inventory of BewanahalliSub-watershed for Watershed Planning and Development Yadgir Taluk, Yadgir District, Karnataka (AESR 6.2)

author(s) RajendraHegde - B.A.Dhanorkar - S.Srinivas - K.V.Niranjana - R.S.ReddyandS.K.Singh
from Indian Council of Agricultural Research (ICAR)
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themes
regions
  • Northern Europe
  • Europe
  • World
  • Southern Asia
  • Asia
  • South-Eastern Asia
citation

RajendraHegde,B.A.Dhanorkar,,S.Srinivas,K.V.Niranjana,R.S.ReddyandS.K.Singh(2019).“LandResourceandHydrologicalInventoryofBewanahalliSub-watershedforWatershedPlanningandDevelopment,YadgirTaluk,YadgirDistrict,Karnataka”,SujalaSWs-LRIAtlasNo.19,ICAR–NBSS&LUP,RC,Bangalore.p.60

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Abstract

Theaverageannualrainfallof887mmintheBewanahallisub-watershedasrecordedfromtheGurmatkalstationdatabyKSNDMC. 75percent,14percentand11percentoftheannualrainfalloccursduringkharif,rabiandsummerseasonsrespectivelyandexhibitedahighertemporalvariability. Theevapotranspirationestimationtooldevelopedindicatesthatthewatershedwaterbalanceisindeficit.Thecropping&irrigationchoicesarenotappropriateandneedtobealteredtoshiftthedeficitwaterbalance. Theestimatedrunoffavailabletouseis24mmforanaverageannualrainfallof919mm(2009-2017).Theutilizablegroundwateris49.7mm(70%of71mmrechargeestimated).Thismeansthetotalavailablewaterresourcecombiningthesoilmoisturestoreforkharif&rabi(133mm)andutilizablerunoffplusrechargeis207(=133+24+50) Theaverageactualevapotranspirationestimatedinthewatershedbasedonthecurrentlanduseandirrigationpracticesforthekharifandrabiseasonsis540mm.Hencetheamountofwateruseforkharifandrabiseasonsmaybeestimatedas675mm(i.e125%ofAET).Thisdemandforthetwoseasonsishigherby468mm,i.e.(675-207).TheAETinJune-Septmonthsisonly47%ofrainfall.Hence,thereisagoodopportunitytoharvesttheexcesswaterthroughwatershedmanagementpracticesforutilizingduringrabiseason. ThetotalnumberofwellspresentinBewanahalliSub-watershedasperLRIdatais10(9-Borewells&1-Openwell).ThegroundwaterlevelwasfoundfromthedataobtainedfromKSNDMCfortheneareststationBalichakra.Deepestlevelswerefoundin2013

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