An extension of the Green - Ampt model to decreasing flooding depth conditions, with efficient dimensionless parametric solution

The theoretical formulation of the Green-Ampt infiltration model has been extended to conditions of decreasing flooding depth in an isolated system. By defining dimensionless variables of flooding depth s and time t, an implicit dimensionless equation t[s] was obtained, which contains a single funda...

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Detalles Bibliográficos
Autor principal: Barrera, Daniel
Otros Autores: Masuelli, Sergio
Formato: Artículo
Lenguaje:Inglés
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Acceso en línea:http://ri.agro.uba.ar/files/intranet/articulo/2011Barrera.pdf
LINK AL EDITOR
Aporte de:Registro referencial: Solicitar el recurso aquí
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245 0 0 |a An extension of the Green - Ampt model to decreasing flooding depth conditions, with efficient dimensionless parametric solution 
246 0 0 |a Extension du modèle de Green - Ampt aux conditions de hauteur de submersion décroissante, avec solution paramétrique adimensionnelle efficace 
520 |a The theoretical formulation of the Green-Ampt infiltration model has been extended to conditions of decreasing flooding depth in an isolated system. By defining dimensionless variables of flooding depth s and time t, an implicit dimensionless equation t[s] was obtained, which contains a single fundamental dimensionless parameter gamma controlling the process, named "infiltration delay parameter". The characteristics and functional behaviour of gamma were analysed, and its physical meaning discussed. A parametric expression s[t] has been obtained, which uses a unique descriptive parameter a, which in turn depends only on gamma and on four generic coefficients valid for a wide range of soil properties and conditions occurring in nature. By means of numerical simulations using different values of soil parameters and initial flooding depths, it was proved that the proposed parametric function generates similar infiltration rates and cumulative storages to those that are obtained starting from Darcy's equation in the extended Green-Ampt scheme. 
653 0 |a DARCY'S EQUATION 
653 0 |a DIMENSIONLESS VARIABLES 
653 0 |a GREEN-AMPT MODEL 
653 0 |a INFILTRATION 
653 0 |a PARAMETRIC SOLUTION 
653 0 |a DARCY'S EQUATIONS 
653 0 |a DELAY PARAMETERS 
653 0 |a DIMENSIONLESS PARAMETERS 
653 0 |a GREEN-AMPT 
653 0 |a GREEN-AMPT INFILTRATION 
653 0 |a INFILTRATION RATE 
653 0 |a ISOLATED SYSTEMS 
653 0 |a PARAMETRIC EXPRESSIONS 
653 0 |a PARAMETRIC FUNCTIONS 
653 0 |a PARAMETRIC SOLUTIONS 
653 0 |a PHYSICAL MEANINGS 
653 0 |a SOIL PARAMETERS 
653 0 |a SOIL PROPERTY 
653 0 |a THEORETICAL FORMULATION 
653 0 |a PLASMA THEORY 
653 0 |a DARCY LAW 
653 0 |a FLOODING 
653 0 |a NUMERICAL MODEL 
700 1 |a Masuelli, Sergio  |9 24120 
773 |t Hydrological Sciences Journal  |g Vol.56, no.5 (2011), p.824-833 
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900 |a ^tAn extension of the Green-Ampt model to decreasing flooding depth conditions, with efficient dimensionless parametric solution 
900 |a ^tExtension du modèle de Green-Ampt aux conditions de hauteur de submersion décroissante, avec solution paramétrique adimensionnelle efficace 
900 |a ^aBarrera^bD. 
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900 |a ^aBarrera^bD. 
900 |a ^aMasuelli^bS. 
900 |a ^aBarrera^bD.^tCONICET/Departamento de Ingeniería Agrícola y Uso de la Tierra, Facultad de Agronomía, Universidad de Buenos Aires, Av. San Martín 4453, Ciudad de Buenos Aires, 1417, Argentina 
900 |a ^aMasuelli^bS.^tInstituto de Altos Estudios Espaciales Mario Gulich, CETT/CONAE, Ruta C45 - Km 8, Falda del Carmen, 5187, Argentina 
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900 |a 833 
900 |a DARCY'S EQUATION 
900 |a DIMENSIONLESS VARIABLES 
900 |a GREEN-AMPT MODEL 
900 |a INFILTRATION 
900 |a PARAMETRIC SOLUTION 
900 |a DARCY'S EQUATIONS 
900 |a DELAY PARAMETERS 
900 |a DIMENSIONLESS PARAMETERS 
900 |a GREEN-AMPT 
900 |a GREEN-AMPT INFILTRATION 
900 |a INFILTRATION RATE 
900 |a ISOLATED SYSTEMS 
900 |a PARAMETRIC EXPRESSIONS 
900 |a PARAMETRIC FUNCTIONS 
900 |a PARAMETRIC SOLUTIONS 
900 |a PHYSICAL MEANINGS 
900 |a SOIL PARAMETERS 
900 |a SOIL PROPERTY 
900 |a THEORETICAL FORMULATION 
900 |a PLASMA THEORY 
900 |a DARCY LAW 
900 |a FLOODING 
900 |a NUMERICAL MODEL 
900 |a The theoretical formulation of the Green-Ampt infiltration model has been extended to conditions of decreasing flooding depth in an isolated system. By defining dimensionless variables of flooding depth s and time t, an implicit dimensionless equation t[s] was obtained, which contains a single fundamental dimensionless parameter gamma controlling the process, named "infiltration delay parameter". The characteristics and functional behaviour of gamma were analysed, and its physical meaning discussed. A parametric expression s[t] has been obtained, which uses a unique descriptive parameter a, which in turn depends only on gamma and on four generic coefficients valid for a wide range of soil properties and conditions occurring in nature. By means of numerical simulations using different values of soil parameters and initial flooding depths, it was proved that the proposed parametric function generates similar infiltration rates and cumulative storages to those that are obtained starting from Darcy's equation in the extended Green-Ampt scheme. 
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