Search results for " Hydrologic balance"

showing 3 items of 3 documents

Actual evapotranspiration assessment by means of a coupled energy/hydrologic balance model: Validation over an olive grove by means of scintillometry…

2010

Summary A coupled energy/hydrologic model was applied to simulate the exchange of energy and water in the soil–plant-atmosphere system (SPA). The model, which uses a “two-source” approach to estimate the energy fluxes, and the “force-restore” approach to represent the water balance, was validated by means of evapotranspiration measurements collected via scintillometry and soil moisture measurements collected via time domain reflectometry (TDR) in a Sicilian olive grove. The comparison between measured and estimated fluxes values at an hourly scale showed good agreement. Additional comparisons on a daily timescale confirmed the model’s applicability for quantifying crop water requirements. A…

Actual evapotranspirationHydrologyScintillometer measurementsMoistureScale (ratio)Settore ICAR/02 - Costruzioni Idrauliche E Marittime E IdrologiaEnergy balanceScintillometer measurementHydrologic balanceWater balanceHydrology (agriculture)EvapotranspirationActual evapotranspiration; Scintillometer measurements; Olive grove; Surface energy fluxes; Hydrologic balanceSoil waterOlive groveSettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-ForestaliEnvironmental scienceSurface energy fluxesSurface energy fluxeWater contentWater Science and TechnologyJournal of Hydrology
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State and parameter update in a coupled energy/hydrologic balance model using ensemble Kalman filtering

2012

Summary The capability to accurately monitor and describe daily evapotranspiration (ET) in a cost effective manner is generally attributed to hydrological models. However, continuous solution of energy and water balance provides precise estimations only when a detailed knowledge of sub-surface characteristics is available. On the other hand, residual surface energy balance models, based on remote observation of land surface temperature, are characterised by sufficient accuracy, but their applicability is limited by the lack of high frequency and high resolution thermal data. A compromise between these two methodologies is represented by the use of data assimilation scheme to include sparse …

Continuous modellingSettore ICAR/02 - Costruzioni Idrauliche E Marittime E IdrologiaKalman filterResidualHydrologic balanceOlive treesWater balanceData assimilationEvapotranspirationEnsemble Kalman filterSettore AGR/08 - Idraulica Agraria E Sistemazioni Idraulico-ForestaliEnvironmental scienceEnsemble Kalman filterSVAT modellingSurface energy fluxesSVAT modelling Surface energy fluxes Hydrologic balance Ensemble Kalman filterWater Science and TechnologyRemote sensingJournal of Hydrology
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Formation Of perched leachate zones in MSW landfill

2010

The paper presents a 1D mathematical model for the simulation of the percolation fluxes throughout a landfill for municipal solid waste (MSW). Specifically, the model is based on mass balance equations, that enable one to simulate the formation of perched leachate zones in a landfill for MSW. The model considers the landfill divided in several layers evaluating the in and out flow throughout each layer as well as the continuous moisture distribution. The infiltration flow is evaluated by means of the Darcy’s law for an unsaturated porous medium, while the moisture distribution evaluation has been carried out on the basis of the theory of the vertically distributed unsaturated flow. The solu…

Settore ICAR/03 - Ingegneria Sanitaria-AmbientaleSettore ICAR/02 - Costruzioni Idrauliche E Marittime E IdrologiaMathematical model perched leachate zone landfill hydrologic balances
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