Report

Land Resource and Hydrological Inventory of YakehalliSub-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
citation

RajendraHegde,B.A.Dhanorkar,,S.Srinivas,K.V.Niranjana,R.S.ReddyandS.K.Singh(2019).“LandResourceandHydrologicalInventoryofYakehalliSub-watershedforWatershedPlanningandDevelopment,YadgirTaluk,YadgirDistrict,Karnataka”,SujalaSWs-LRIAtlasNo.64,ICAR–NBSS&LUP,RC,Bangalore.p.38

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Abstract

Theaverageannualrainfallof887mmintheYakehallisub-watershedasrecordedfromtheHattikunistationdata. 80%,12%and8%oftheannualrainfalloccursduringkharif,rabiandsummerseasonsrespectivelyandexhibitedahighertemporalvariability. Theevapotranspirationestimationtooldevelopedindicatesthatthewatershedwaterbalanceisindeficit.Thecropping&irrigationchoicesarenotappropriateandneedtobealteredtoshiftthedeficitwaterbalance. Theestimatedrunoffavailabletouseis53mmforanaverageannualrainfallof830mm(2009-2017).Theutilizablegroundwateris49.7mm(70%of71mmrechargeestimated).Thismeansthetotalavailablewaterresourcecombiningthesoilmoisturestoreforkharif&rabi(142mm)andutilizablerunoffplusrechargeis245(=142+53+50) Theaverageactualevapotranspirationestimatedinthewatershedbasedonthecurrentlanduseandirrigationpracticesforthekharifandrabiseasonsis563mm.Hencetheamountofwateruseforkharifandrabiseasonsmaybeestimatedas704mm(i.e.125%ofAET).Thisdemandforthetwoseasonsishigherby459mm,i.e.(704-245).TheAETinJune-Septmonthsisonly52%ofrainfall.Hence,thereisagoodopportunitytoharvesttheexcesswaterthroughwatershedmanagementpracticesforutilizingduringrabiseason. ThetotalnumberofwellspresentinYakehalliSub-watershedasperLRIdatais8Borewells.ThegroundwaterleveldataobtainedfromDept.ofMines&GeologyfortheneareststationYergol.Thegroundwaterlevelduringtheyears2011-2017wereslightlyvarying,whereasduringtheyear2014wasfoundconstant

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