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Water Balance Group. Russell Auwae Hannah Cooper Helder Da Costa Denise Duenas Abby Frazier James Frizzell Melissa Kahili. Introduction. Hawai‘i’s success is due to fresh water available from Orographic rainfall Water is the most important natural resource Health Economics Land Use - PowerPoint PPT Presentation

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  • Russell AuwaeHannah CooperHelder Da CostaDenise DuenasAbby FrazierJames FrizzellMelissa Kahili

  • IntroductionHawaiis success is due to fresh water available from Orographic rainfall Water is the most important natural resourceHealthEconomicsLand UseSustenance

  • ObjectivesWhere does the water go in the Mnoa basin?Ground Water Recharge Evapotranspiration for Hydrologic CycleHuman Impacts on Hydrologic CycleEcosystem AnalysisFlood Analysis

  • Water Balance ModelText Description:

    Water Balance = Hydrometeorology + Soil Physics + Groundwater Hydrology

    Simple Water Balance Formula:

    Input = Output + Storage

    RF + Irr + CWI = RO + ET + GWR + SM

  • Water Balance Model RainfallPotential EvapotranspirationIrrigationRun-offPIrrETRchgRO SM

  • Input ParametersAvailable Water CapacityRoot Depth (mm)Crop FactorInitial Soil Moisture (AW/AWC)Fraction of Area Paved (Amount of Land Cover Paved)Irrigated Area (Irrigated or Not Irrigated)

  • OutputsActual EvapotranspirationSoil Moisture ContentGroundwater Recharge

  • Evapotranspiration Average throughout Mnoa Valley*Total evapotranspiration: 171.9 mm

  • *Greatest amount of evapotranspiration occurs near Lyon Arboretum

    *Lowest values for found in the back of Mnoa Valley most likely due to low net radiationEvapotranspiration

  • How good is the water balance model when measuring Soil Moisture throughout Mnoa Valley?

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