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Land Resource and Hydrological Inventory of KalakeriSub-watershed for Watershed Planning and Development Koppal Taluk, Koppal District, Karnataka (AESR 3.0)

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

RajendraHegde,K.V.Niranjana,S.Srinivas,B.A.Dhanorkar,R.S.ReddyandS.K.Singh(2019).“LandResourceandHydrologicalInventoryofKalakeriSub-watershed(SWs)forWatershedPlanningandDevelopment,KoppalTaluk,KoppalDistrict,Karnataka”,SujalaSWs-LRIAtlasNo.9,ICAR–NBSS&LUP,RC,Bangalore.p.65

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Abstract

Theaverageannualrainfallof631mmintheKalakerisub-watershedasrecordedfromtheIrakallagadastationdatabyKSNDMC. 68percent,15percentand17percentoftheannualrainfalloccursduringkharif,rabiandsummerseasonsrespectivelyandexhibitedahighertemporalvariability. Theevapotranspirationestimationtooldevelopedindicatesthatthewatershedwaterbalanceisindeficit.Thecropping&irrigationchoicesarenotappropriateandneedtobealteredtoshiftthedeficitwaterbalance. Theestimatedrunoffavailabletouseis17mmforanannualrainfallof706mm(2009-2017).Theutilizablegroundwateris31mm(70%of44mmrechargeestimated).Thismeansthetotalavailablewaterresourcecombiningthesoilmoisturestoreforkharif&rabi(244mm)andutilizablerunoffplusrechargeis292mm(=244+17+31) Theaverageactualevapotranspirationestimatedinthewatershedbasedonthecurrentlanduseandirrigationpracticesforthekharifandrabiseasonsis527mm.Hencetheamountofwateruseforkharifandrabiseasonsmaybeestimatedas659mm(i.e125%ofAET).Thisdemandforthetwoseasonsismarginallyhigherby367mm,i.e.(659-292).TheAETinJune-Septmonthsis73%ofrainfall.Hence,thereisslightlylessopportunitytoharvesttheexcesswaterthroughwatershedmanagementpracticesforutilizingduringrabiseason. ThetotalnumberofwellspresentinKalakeriSub-watershedasperLRIdatais214(205-Borewells&9-Openwells).GroundwaterlevelswasfoundfromthedataobtainedfromKSNDMCfortheneareststationofHonnahunsi.Deepestlevelswerefoundin2008

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