Modern and effective water management in large alluvial plains that have intensive agricultural activity requires the integrated modeling of soil and groundwater. The models should be complex enough to properly simulate several, often non-linear, processes, but simple enough to be effectively calibrated with the available data. An operative, practical approach to calibration is proposed, based on three main aspects. First, the coupling of two models built on well-validated algorithms, to simulate (1) the irrigation system and the soil water balance in the unsaturated zone and (2) the groundwater flow. Second, the solution of the inverse problem of groundwater hydrology with the comparison model method to calibrate the model. Third, the use of appropriate criteria and cross-checks (comparison of the calibration results and of the model outputs with hydraulic and hydrogeological data) to choose the final parameter sets that warrant the physical coherence of the model. The approach has been tested by application to a large and intensively irrigated alluvial basin in northern Italy.

MODELING WATER RESOURCES OF AN ALLUVIAL PLAIN: COUPLING AND CALIBRATING SOIL AND GROUND WATER MODELS / C. Vassena, M. Rienzner, G. Ponzini, M. Giudici, C. Gandolfi, C. Durante, D. Agostani. - In: HYDROGEOLOGY JOURNAL. - ISSN 1431-2174. - 20:3(2012 Jan 20), pp. 449-467.

MODELING WATER RESOURCES OF AN ALLUVIAL PLAIN: COUPLING AND CALIBRATING SOIL AND GROUND WATER MODELS

C. Vassena
Primo
;
M. Rienzner
Secondo
;
G. Ponzini;M. Giudici;C. Gandolfi;
2012-01-20

Abstract

Modern and effective water management in large alluvial plains that have intensive agricultural activity requires the integrated modeling of soil and groundwater. The models should be complex enough to properly simulate several, often non-linear, processes, but simple enough to be effectively calibrated with the available data. An operative, practical approach to calibration is proposed, based on three main aspects. First, the coupling of two models built on well-validated algorithms, to simulate (1) the irrigation system and the soil water balance in the unsaturated zone and (2) the groundwater flow. Second, the solution of the inverse problem of groundwater hydrology with the comparison model method to calibrate the model. Third, the use of appropriate criteria and cross-checks (comparison of the calibration results and of the model outputs with hydraulic and hydrogeological data) to choose the final parameter sets that warrant the physical coherence of the model. The approach has been tested by application to a large and intensively irrigated alluvial basin in northern Italy.
groundwater recharge/water budget ; inverse modelling ; groundwater/surface-water relations ; irrigation ; unsaturated zone
Settore AGR/08 - Idraulica Agraria e Sistemazioni Idraulico-Forestali
Settore GEO/12 - Oceanografia e Fisica dell'Atmosfera
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/170099
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