Results 201 to 210 of about 10,742 (254)

Normalized Graphs of Border‐Irrigation Performance

Journal of Irrigation and Drainage Engineering - ASCE, 1984
Good irrigation management requires the ability to predict the outcome of any given combination of field and management parameters—soil infiltration characteristics, border length, slope and roughness, and inflow rate and cut‐off time in the case of simple border irrigation.
Theodor Strelkoff, Strelkoff Theodor
exaly   +2 more sources

Border Ditch Irrigation in Colorado

Transactions of the ASAE, 1982
ABSTRACT THE border ditch method is a labor intensive form of surface irrigation that is most appropriate for crops with deep root zones and large water requirements. Ir-rigating a field using the method requires irrigator ex-perience gained from trial and error experimentation on that particular field.
null F. T. Izuno, null W. Clyma, null T. H. Podmore   +2 more
openaire   +1 more source

Mathematical Model of Border Irrigation

Journal of the Irrigation and Drainage Division, 1980
The model can predict the rates of advance and recession and the duration and depth of infiltration at any point in a border when slope, length, roughness, inflow rate and infiltration rate are specified. It provides an accurate and economical way to analyze the hydraulics of border irrigation, and thus can enable designers and operators to find ...
David W. Fonken, Delmar D. Fangmeier, Emmett M. Laursen, Thomas Carmody   +3 more
openaire   +1 more source

Muskingum Model for Border Irrigation

Journal of Irrigation and Drainage Engineering, 1988
A mathematical model for border irrigation is developed using the spatially lumped continuity equation and the Muskingum type storage relation. The storage parameter is determined from physical border characteristics. The model is calibrated and tested using twentyfour experimental data sets, and yields satisfactory results.
Vijay P. Singh, Panagiotis D. Scarlatos, Sergio A. Raudales   +2 more
openaire   +1 more source

Analytical Model for Border Irrigation

Journal of Irrigation and Drainage Engineering, 1989
This study develops a simple analytical model, using the volume balance approach, to simulate all phases of border irrigation.
Fang X. Yu, Vijay P. Singh
openaire   +1 more source

Border Irrigation Model Selection

Transactions of the ASAE, 1984
ABSTRACT THE capability of zero-inertia, kinematic-wave, and volume-balance models to predict advance and recession phases in free-end border irrigation were compared to field data for different values of border width and discharge in a loamy and sandy loam soil. All models give very good predictions of the advance.
null E. A. Holzapfel, null M. A. Marino, null J. Chavez-Morales   +2 more
openaire   +1 more source

Simple Model of Border Irrigation

Journal of Irrigation and Drainage Engineering, 1986
This paper describes a numerical model for irrigation of sloping and level borders. The model solves the differential form of the combined equations for the conservation of mass and momentum with the acceleration terms removed. A finite difference scheme is used with the depth gradient term expressed explicitly and averaged over the entire wetted ...
openaire   +1 more source

Water front advance in irrigation borders

Journal of Agricultural Engineering Research, 1971
The time-distance relationship in water front advance is an important factor to be determined in designing an efficient border irrigation system. Water front advance in a border strip is a case of spatially varied unsteady flow with decreasing discharge.
A.M. Michael, A.C. Pandya
openaire   +1 more source

Mathematical model for design of border irrigation

Water Resources Management, 1991
A mathematical model based on the complete hydrodynamic equations of open-channel flow is developed for simulation of a complete irrigation in a border irrigation system. An explicit two-step numerical scheme has been employed for the solution of the flow equations. The total infiltrated water depth at each location along the border is determined. From
John G. Sakkas, Constantine V. Bellos
openaire   +1 more source

Border-Irrigation Hydraulics with Zero Inertia

Journal of the Irrigation and Drainage Division, 1977
A mathematical model of the stream flow in border irrigation is presented in the context of negligible accelerations everywhere in the stream. During the advance phase, numerical solution of the governing equations is achieved on an oblique grid in the x-t plane.
Theodor Strelkoff, Nikolaos D. Katopodes
openaire   +1 more source