Report

Land Resource Inventory and Hydrological Inventory of Malhar Sub-watershed for Watershed Planning and DevelopmentYadgir 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).“LandResourceandHydrologicalInventoryofMalharSub-watershedforWatershedPlanningandDevelopment,YadgirTaluk,YadgirDistrict,Karnataka”,SujalaSWS-LRIAtlasNo.65,ICAR–NBSS&LUP,RC,Bangalore.p.57

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Abstract

Theaverageannualrainfallof887mmintheMalharsub-watershedasrecordedfromtheBalichakrastationdata. 80%,13%and8%oftheannualrainfalloccursduringkharif,rabiandsummerseasonsrespectivelyandexhibitedahighertemporalvariability. Theevapotranspirationestimationtooldevelopedindicatesthatthewatershedwaterbalanceisindeficit.Thecropping&irrigationchoicesarenotappropriateandneedtobealteredtoshiftthedeficitwaterbalance. Theestimatedrunoffavailabletouseis12mmforanaverageannualrainfallof622mm(2009-2017).Theutilizablegroundwateris49.7mm(70%of71mmrechargeestimated).Thismeansthetotalavailablewaterresourcecombiningthesoilmoisturestoreforkharif&rabi(479mm)andutilizablerunoffplusrechargeis541(=479+12+50) Theaverageactualevapotranspirationestimatedinthewatershedbasedonthecurrentlanduseandirrigationpracticesforthekharifandrabiseasonsis515mm.Hencetheamountofwateruseforkharifandrabiseasonsmaybeestimatedas644mm(i.e125%ofAET).Thisdemandforthetwoseasonsishigherby103mm,i.e.(644-541).TheAETinJune-Septmonthsisonly59%ofrainfall.Hence,thereisagoodopportunitytoharvesttheexcesswaterthroughwatershedmanagementpracticesforutilizingduringrabiseason. ThetotalnumberofwellspresentinMalharSub-watershedasperLRIdatais17Borewells.ThegroundwaterleveldataobtainedfromDept.ofMines&GeologyfortheneareststationBalichakra.Thegroundwaterlevelduringtheyears2011-2017wereslightlyvarying,whereasduringtheyear2014wasfoundconstant

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