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Land Resource and Hydrological Inventory of Mattimadu Sub-watershed for Watershed Planning and Development ChitapurTaluk, KalaburagiDistrict, Karnataka(AESR 6.2)

author(s) RajendraHegde - B.A.Dhanorkar - S.Srinivas - K.M.Nair - K.V.Niranjana - 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,B.A.Dhanorkar,S.Srinivas,K.M.Nair,K.V.Niranjana,R.S.ReddyandS.K.Singh(2016).“LandResourceandHydrologicalInventoryofMattimaduSub-watershedforWatershedPlanningandDevelopment,ChitapurTaluk,GulbargaDistrict,Karnataka”,SujalaSWs-LRIAtlasNo.69,ICAR–NBSS&LUP,RC,Bangalore.p.48

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Abstract

Theaverageannualrainfallof759mmintheMattimadusub-watershedasrecordedfromtheGundgurthistationdatabyKSNDMC. 75%,13%and12%oftheannualrainfalloccursduringkharif,rabiandsummerseasonsrespectivelyandexhibitedahighertemporalvariability. Theevapotranspirationestimationtooldevelopedindicatesthatthewatershedwaterbalanceisinsustainablelimit. Theestimatedrunoffavailabletouseis2mmforanaverageannualrainfallof855mm(2009-2017).Theutilizablegroundwateris37mm(70%of53mmrechargeestimated).Thismeansthetotalavailablewaterresourcecombiningthesoilmoisturestoreforkharif&rabi(191mm)andutilizablerunoffplusrechargeis230(=191+37+2) Theaverageactualevapotranspirationestimatedinthewatershedbasedonthecurrentlanduseandirrigationpracticesforthekharifandrabiseasonsis514mm.Hencetheamountofwateruseforkharifandrabiseasonsmaybeestimatedas642mm(i.e125%ofAET).Thisdemandforthetwoseasonsishigherby412mm,i.e.(642-230).TheAETinJune-Septmonthsis49%ofrainfall.Hence,thereisagoodopportunitytoharvesttheexcesswaterthroughwatershedmanagementpracticesforutilizingduringrabiseason. ThegroundwaterlevelwasfoundfromthedataobtainedfromKSNDMCfortheneareststationGundgurthi.Thegroundwaterlevelsduringtheyears2008-2017wasslightlyvaryingexceptMay2016

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