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Land Resource and Hydrological Inventory of ShahpuraSub-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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themes
regions
  • Northern Europe
  • Europe
  • World
  • Southern Asia
  • Asia
citation

RajendraHegde,K.V.Niranjana,S.Srinivas,B.A.Dhanorkar,R.S.ReddyandS.K.Singh(2019).“LandResourceandHydrologicalInventoryofShahpuraSub-watershed(SWs)forWatershedPlanningandDevelopment,KoppalTaluk,KoppalDistrict,Karnataka”,SujalaSWs-LRIAtlasNo.14,ICAR–NBSS&LUP,RC,Bangalore.p.65

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Abstract

Theaverageannualrainfallof631mmintheShahpurasub-watershedasrecordedfromtheIrakallgadaStationdatabyKSNDMC. 68%,15%and17%oftheannualrainfalloccursduringkharif,rabiandsummerseasonsrespectivelyandexhibitedahighertemporalvariability. Theevapotranspirationestimationtooldevelopedindicatesthatthewatershedwaterbalanceisindeficit.Thecropping&irrigationchoicesareinappropriateandneededtobealtered. Theestimatedrunoffavailabletouseis16mmforanaverageannualrainfallof706mm(2009-2017).Theutilizablegroundwateris31mm(70%of44mmrechargeestimated).Thismeansthetotalavailablewaterresourcecombiningthesoilmoisturestoreforkharif&rabi(184mm)andutilizablerunoffplusrechargeis231(=184+31+16) Theaverageactualevapotranspirationestimatedinthewatershedbasedonthecurrentlanduseandirrigationpracticesforthekharifandrabiseasonsis546mm.Hencetheamountofwateruseforkharifandrabiseasonsmaybeestimatedas682mm(i.e125%ofAET).Thisdemandforthetwoseasonsishigherby451mm,i.e.(682-231).TheAETinJune-Septmonthsis75%ofrainfall.Hence,thereisagoodopportunitytoharvesttheexcesswaterthroughwatershedmanagementpracticesforutilizingduringrabiseason. ThetotalnumberofwellspresentinShahpuraSub-watershedasperLRIdataare299(283-Borewells,16-Openwells).ThegroundwaterlevelwasfoundfromthedataobtainedfromKSNDMCfortheneareststationHireshindhogi.Deepestlevelwasfoundin2009year

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