Results 151 to 160 of about 622 (180)

SCS Curve Number and Green-Ampt Infiltration Models

Journal of Hydrologic Engineering, 2019
AbstractSoil Conservation Service curve number (SCS-CN) and Green-Ampt (GA) infiltration models are probably the most applied equations in practical hydrology to compute the amount of direct runoff...
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

Explicit Solution to Green‐Ampt Equation for Nonuniform Soils

Journal of Irrigation and Drainage Engineering, 1988
The solution for accumulated infiltration using the Green-Ampt equation requires an iterative solution. By using a power series approximtion to a logarithmic term, an equation has been developed to directly calculate the accumulated infiltration for nonuniform soils.
G. N. Flerchinger, F. J. Watts, G. L. Bloomsburg   +2 more
openaire   +1 more source

Stability of the Green‐Ampt Profile in a Delta Function Soil

Water Resources Research, 1985
The sharp wetting front of Green and Ampt represents a solution of the Richards equation for infiltration into a delta‐function soil. In order that the sharpness of this profile be maintained in the presence of a small perturbation of the profile shape, it is sufficient that the second derivative of hydraulic conductivity with respect to moisture ...
openaire   +1 more source

An Approximate Explicit Green–Ampt Infiltration Model for Cumulative Infiltration

Soil Science Society of America Journal, 2018
Core Ideas Proposed an explicit Green–Ampt model (EGA model) to estimate cumulative 1D vertical infiltration. The form of error term &
Wei-Bo Nie, Yi-Bo Li, Ye Liu, Xiao-Yi Ma
openaire   +1 more source

Applicability of the Green-Ampt Infiltration Model with Shallow Boundary Conditions

Journal of Hydrologic Engineering, 2011
The Green-Ampt model is an approximate analytical solution to Richards’ equation that is commonly used to simulate infiltration processes in hydrological models and land surface schemes. The Green-Ampt model assumes that neither a water table nor an impermeable layer (e.g., bedrock or a frost table) exist near the soil surface.
Guoxiang Liu, James R. Craig, Eric D. Soulis   +2 more
openaire   +1 more source

Green‐Ampt Analysis of Wetting Patterns for Surface Emitters

Journal of Irrigation and Drainage Engineering, 1994
A three‐dimensional Green‐Ampt analysis is developed, and the infiltration capacity curve for a three‐dimensional infiltration model is presented. The infiltration‐capacity curve represents the time distribution of wetting‐pattern volume of a water source with unlimited inflow supply. A significant feature of the infiltration‐capacity curve is that the
openaire   +1 more source

Runoff–infiltration partitioning using an upscaled Green–Ampt solution

Hydrological Processes, 2010
AbstractA new set of formulae for calculating regionally averaged infiltration rates into heterogeneous soils is presented. The solutions are based upon an upscaled approximation of the explicit Green‐Ampt (GA) infiltration solution, and require specification of the spatial distribution of saturated hydraulic conductivity and/or initial soil water ...
J. R. Craig, G. Liu, E. D. Soulis
openaire   +1 more source

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

Water Resources Management, 2011
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 ...
Ravindra V. Kale, Bhabagrahi Sahoo
openaire   +1 more source

Modeling Infiltration into Crusted Soils by the Green—Ampt Approach

Soil Science Society of America Journal, 1983
Abstract The study deals with infiltration of water through a stable surface crust, wherein the water content at the crust‐soil interface increases with time for a long period, and remains below the saturated value. An approximate Green‐Ampt‐type formulation derived from a physical basis, containing a time‐dependent capillary drive ...
openaire   +1 more source