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Applicability of the Modified Green-Ampt Model Based on Suction Head Calculation in Water-Repellent Soil

Water (Switzerland), 2023
Water repellency has a great influence on water infiltration into soil. Currently, there is no modified correlation model that is applicable to the water infiltration of water-repellent soils (WRS). In order to better construct a model suitable for water
Youzhen Xiang, Bei Zhang
exaly   +2 more sources

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A Modified Green-Ampt Infiltration Model for Muddy Water

Journal of Hydrology
Liangjun Fei, Yun Zhong
exaly   +2 more sources

Solutions to Green-Ampt Infiltration Equation

Journal of the Irrigation and Drainage Division, 1976
The simple method of solving the Green-Ampt one-dimensional infiltration equations developed from Darcy's law are proposed for practical applications. The explicit solution is an approximation obtained by employing a power series expansion of the logarithmic term. The maximum error resulting from applying this simple explicit solution is 8%.
Ruh-Ming Li, Daryl B. Simons, Michael A. Stevens   +2 more
openaire   +1 more source

DEVELOPMENT OF A CRUST FACTOR FOR A GREEN AMPT MODEL

Transactions of the ASAE, 1990
ABSTRACT The formation of a soil crust has been shown to cause a major decrease in infiltration and needs to be accounted for in infiltration models. In response to this need, a procedure based on such properties and wetted front depth was developed for incorporating the steady state crust conductivity into the hydraulic conductivity term of the Green ...
null W. J. Rawls, null D. L. Brakensiek, null J. R. Simanton, null K. D. Kohl   +3 more
openaire   +1 more source

Use of the Green‐Ampt Equation with Variable Conductivity

Soil Science Society of America Journal, 1976
Abstract A comparison with Phillp's two‐term equation, derived from a series solution involving t 1/2 , indicates that the hydraulic conductivity in the Green‐Ampt equation of vertical infiltration varies with time when the soil water content of the transmission zone is ...
L. R. Ahuja, G. Y. Tsuji
openaire   +1 more source

Approximate Form of Green‐Ampt Infiltration Equation

Journal of Irrigation and Drainage Engineering, 1994
We develop an approximation of the Green‐Ampt infiltration equation by using the first two terms of a Taylor‐series expansion of the equation. The resulting approximate equation is in the form of the Philip's equation, with an added term to account for the error in the approximation.
Jeffry J. Stone, Richard H. Hawkins, Edward D. Shirley   +2 more
openaire   +1 more source

Exploring the parameter space of the Green–Ampt model

Advances in Water Resources, 2013
This study systematically investigates the entire parameter space of the Green–Ampt model for water infiltration and allows for arbitrary constant hydraulic head boundary conditions, any column inclination, hydrophilic and hydrophobic porous media, and a nonzero initial cumulative infiltration.
Markus Hilpert, Roland Glantz
openaire   +1 more source

The Green–Ampt limit with reference to infiltration coefficients

Water Resources Research, 2012
Recent progress with an analytic nonlinear model has provided the exact infiltration coefficients for realistic soil behaviors with nonsingular hydraulic functions, as well as their exact delta‐function diffusivity limits. After some correction and reinterpretation of the approximate analytical method, the exactly solvable model validates some ...
D. Triadis, P. Broadbridge
openaire   +1 more source

Applications of the Green-Ampt Method across Scales

World Environmental and Water Resources Congress 2014, 2014
The Green-Ampt method has been widely used for simulating infiltration and rainfall-runoff processes in various hydrologic models across spatial scales ranging from small laboratory scales to large field and watershed scales. A fundamental question is this: how do such spatial scales affect the applicability of the Green-Ampt method?
Xuefeng Chu, Noah Habtezion
openaire   +1 more source

Drainage to a water table analysed by the Green-Ampt approach

Journal of Hydrology, 1976
By means of the Green-Ampt analysis, it is shown that the drainage from an initially saturated column of porous material after the water table is suddenly lowered to a given level from the surface on which infiltration is maintained at a rate q during the drainage, may be described to a good approximation by the equation: 1-Q′Q′∞=exp[-(F0-q)tQ′∞]
E.G. Youngs, S. Aggelides
openaire   +1 more source