Abstract:
Existingdataontopography ,climate,soil,lan dusepattern,water
availability,agriculturalpractices,investmen tcostsandsocioeconomi c
practicesareinvestigate dandth eirrigatio nsuitabilitycriteriaisdefined
basedonthes evariables.DigitalElevationModels(DEMs )isdevelopedt o
investigat eth eterrai nfeatur eofth ebasinfro mth edigitizedContourmapof
th ebasinandth evariationinelevationaswellasslopeisevaluated.
Streamne tworkcharacterization,mappingsoilandlan duseunitsusingGIS
environmentanddefiningthei rsuitabilityfo rirrigatio naswellascrop
developmentwithrespec tt oth eprevailingconditionshasbeenmade.
Super-imposingallthes eattributesinth eGISenvironmentandidentifyin g
potentiallysuitableareasfo rcropdevelopment,suggestingappropriate
methodofirrigation ,compilinggeoreferencedsuitabilitydatabase(slope,
soil,lan duse,water)fo rirrigatio nareamon gth emaintreatment s
undertakenduringth estudy.
LargeportionofGelanaandth elowe rdeltaofHare,KulifoandBilateare
characterizedwithsuitablesoilunitshavinggoodinheren tfertilit yandhigh
moistureholdingcapacity.Besides,thes eareasarewithveryfla tlan dslope
asobservedfro mth eDEMswhichfall sbelow10%andaresuitablefo r
surfaceirrigation .
Thecapacityoflo wflo waswellas80% ,90 %and95percentagetim eof
exceedenceflo wofth eavailablesurfacewateri nth erespectiv esubbasins
