Infiltration Model for Furrow Irrigation

Enciso-Medina, J.; Martin, Derrel L.; Eisenhauer, Dean E.

doi:10.1061/(asce)0733-9437(1998)124:2(73)

Cited by 27 publications

(19 citation statements)

References 12 publications

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“…Hence, this model is applicable for the situation where the hydraulic conductivity decreases with depth. Enciso-Medina et al (1998) also presented the one-dimensional (1D) Green and Ampt approach to model the infiltration into the seal-formed soil, wherein the Runge-Kutta method was used to solve the infiltration function. The algorithm presented by them involves the tedious algebraic manipulation which results in excessive execution time and error in computation.…”

Section: Variants Of Green-ampt Model Accounting For Surface Sealmentioning

confidence: 99%

Green-Ampt Infiltration Models for Varied Field Conditions: A Revisit

Kale

Sahoo

2011

Water Resour Manage

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The Green-Ampt (GA) infiltration model is a simplified version of the physically based full hydrodynamic model, known as the Richards equation. The simplicity and accuracy of this model facilitates for its use in many field problems, such as, infiltration computation in rainfall-runoff modelling, effluent transport in groundwater modelling studies, irrigation management studies including drainage systems etc. The numerous infiltration models based on the Green-Ampt approach have been widely investigated for their applicability in various scenarios of homogeneous soils. However, recent advances in physically based distributed rainfall-runoff modeling demands for the use of improved infiltration models for layered soils with non-uniform initial moisture conditions under varying rainfall patterns to capture the actual infiltration process that exists in nature. The difficulty that modelers are facing now-a-days includes the estimation of time of ponding and the application of the infiltration model to unsteady rainfall events occurring in heterogeneous soil conditions. The investigation in this direction exhibits that only few infiltration models can handle these situations. Hence, it is of vital importance to analyze the usefulness of different variants of the Green-Ampt infiltration models in terms of their degree of accuracy, complexity and applicability limits. This paper provides a brief review of these infiltration models to bring out their usefulness in the rainfall-runoff and irrigation modeling studies as well as the drawbacks associated with these models.

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Section: Variants Of Green-ampt Model Accounting For Surface Sealmentioning

confidence: 99%

Green-Ampt Infiltration Models for Varied Field Conditions: A Revisit

Kale

Sahoo

2011

Water Resour Manage

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“…These results indicated that the GA model can reliably estimate Z f with high accuracy, although its estimated value is slightly higher than that of the proposed model. However, the GA model is expressed by an implicit equation and is solved using an iterative method, which, to a certain extent, limits the application of the model [7,13,14]. In the Ali model, the logarithmic term of the GA model (Equation (4)) is replaced by a sequential segmental second-order polynomial; subsequently, a generalized algebraic equation-based model is developed to estimate the Z f value of 1D vertical infiltration [27].…”

Section: Comparison and Discussion Of The Four Modelsmentioning

confidence: 99%

“…Equation (4) is another form of the GA implicit infiltration model, and it can be solved to estimate the depth of the advancement of the wetting front, Z f , for increments in time by using any suitable iterative scheme [7,13,14].…”

Section: Ga Modelmentioning

confidence: 99%

“…The model is essentially an equation in which an algebraic and logarithmic term is used to implicitly represent the time-varying cumulative infiltration volume [2,13]. In the GA model, the cumulative infiltration volume is estimated using an iteration method [7,13,14]. To avoid performing iterations, different forms of explicit solutions to the GA model have been developed [13,[15][16][17][18][19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

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Approximate Explicit Solution to the Green-Ampt Infiltration Model for Estimating Wetting Front Depth

Nie

Fei

2017

Water

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Obtaining reliable information on the wetting front depth of soil is beneficial to the understanding of one-dimensional (1D) vertical infiltration under border irrigation. This paper presents an approximate explicit solution to the Green-Ampt (GA) infiltration model for estimating the wetting front depth. Moreover, the model proposed in this study, the GA model, the Ali model, and the Stone model were validated and evaluated using laboratory experimental data and HYDRUS-1D simulation. Statistical comparisons (root mean square error-RMSE, mean absolute percent relative error-MAPRE, and percent bias-PB) of the estimated data with the measured and simulated data were conducted. The models were ranked on the basis of their overall performance index (OPI). The results demonstrated that all four models can be used to estimate the wetting front depth of 1D vertical infiltration for a wide range of soil textures; the proposed model provided the most accurate result. According to comparisons of the estimated values with the measured and simulated values, the maximum RMSE, MAPRE, and PB were 1.74 cm, 6.92%, and −6.74%, respectively, for the proposed model. On the basis of the OPI, the optimal model was the proposed model, followed by the Ali, GA, and Stone models.

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“…Rivera et al (1995) afirmam que a dificuldade em se caracterizar a infiltração no solo é um grande problema no dimensionamento dos sistemas de irrigação por superfície, porque torna crítica a determinação da vazão e do tempo de aplicação d'água adequados. Enciso-Medina et al (1998) reportam que a variação no teor de umidade inicial do solo contribui para a variação espacial e temporal da taxa de infiltração; eles afirmam, ainda, que a taxa de infiltração é por demais afetada pelo desenvolvimento de crostas (selamentos) impermeáveis na superfície.…”

Section: Introductionunclassified

Efeito Das Variações Espaço-Temporais Dos Parâmetros De Kostiakov-Lewis Na Infiltração Acumulada

Carvalho

Azevedo

Gomes³

et al. 1999

Rev. bras. eng. agríc. ambient.

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RESUMOAvaliaram-se os efeitos das variações espacial e temporal dos parâmetros da equação de Kostiakov-Lewis, na estimativa da infiltração acumulada. Foram realizadas avaliações de campo num sistema de irrigação por sulco, para cada evento de irrigação ao longo da estação de cultivo, durante a qual foram observadas variações espaciais máximas de 94,7, 44,3 e 55,2% e, espacialmente, as variações temporais máximas foram 80,0, 42,5 e 43,8%, respectivamente, nos parâmetros fo, k e a.

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Infiltration Model for Furrow Irrigation

Cited by 27 publications

References 12 publications

Green-Ampt Infiltration Models for Varied Field Conditions: A Revisit

Green-Ampt Infiltration Models for Varied Field Conditions: A Revisit

Approximate Explicit Solution to the Green-Ampt Infiltration Model for Estimating Wetting Front Depth

Efeito Das Variações Espaço-Temporais Dos Parâmetros De Kostiakov-Lewis Na Infiltração Acumulada

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