Results 131 to 140 of about 502 (174)

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   +3 more sources

Modification and discussion of the Green-Ampt model for an evolving wetting profile

Hydrological Sciences Journal, 2020
The Green-Ampt (GA) model has been widely used to evaluate soil water infiltration. While a simple piston profile is commonly used, the wetting profile of a soil changes during infiltration and a q...
Qiyong Zhang, Wenwu Chen, Yuzhen Kong
openaire   +3 more sources

On a fractional derivative form of the Green–Ampt infiltration model

Advances in Water Resources, 2011
Abstract The Green–Ampt model for infiltration into homogeneous soils predicts a monotonically decreasing infiltration rate and a wetting front that initially advances as the square root of time. Infiltration in heterogeneous soils, however, can exhibit non-monotonic infiltration rates and wetting front advances that differ from the square root of ...
Vaughan R Voller
openaire   +3 more sources

A modified Green-Ampt infiltration model for muddy water

Journal of Hydrology
Shouxuan Kang, Liangjun Fei, Yun Zhong, Penghui Zhao, Zhen Yang, Qianwen Fan   +5 more
openaire   +3 more sources

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

Green‐Ampt—Model to Predict Surge Irrigation Phenomena

Journal of Irrigation and Drainage Engineering, 1987
A significant advantage attributed to surge flow irrigation is that for the same volume of water applied the stream will advance farther along the furrow than with continuous flow. Where this advance phenomenon exists, the reduction in runoff and deep percolation will improve uniformity and application efficiency.
M. A. Killen, D. C. Slack
openaire   +1 more source

Application of the Green–Ampt model for infiltration into layered soils

Journal of Hydrology, 2015
Summary Using the Green–Ampt model for layered soils, a theoretical method is proposed to estimate the layers’ hydraulic parameters based on infiltration test data. To evaluate the proposed method and to investigate the effect of the layers’ permeability on infiltration, constant head infiltration tests were conducted on six different two-layered ...
Jahanshir Mohammadzadeh-Habili, Manouchehr Heidarpour   +1 more
openaire   +1 more source

Explicit infiltration equations based on the Green–Ampt model

Canadian Journal of Civil Engineering, 1987
The Green–Ampt infiltration equations are based on physical parameters of the soil that can be either measured or calculated reasonably easily. However, neither the infiltration rate equation nor the cumulative depth of infiltration equation is in a form that can be used easily in hydrologic modeling, as both equations are in an implicit form when ...
K. P. Thooyamani, D. I. Norum
openaire   +1 more source

Modified Green-Ampt Infiltration Model for Steady Rainfall

Journal of Hydrologic Engineering, 2014
AbstractThe Green-Ampt equation describing the infiltration of water into soil requires that the rainfall intensity is greater than the infiltration capacity of the soil at all times. The well-known Mein-Larson model modifies the Green-Ampt equation and attempts to avoid this restriction for infiltration of water into a homogeneous soil under rainfall ...
J. Almedeij, I. I. Esen
openaire   +1 more source

Development of a modified Green–Ampt model considering the unsaturated zone

Biosystems Engineering
Yuchen Li, Weibo Nie, Zhengjiang Feng, Ge Li   +3 more
openaire   +3 more sources