Results 171 to 180 of about 110,951 (186)
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Infiltration Evaluation Strategy for Border Irrigation Management
Journal of Irrigation and Drainage Engineering, 2011Water infiltration into soil plays a vital role in the performance of surface irrigation. Real-time information on infiltration characteristics is necessary to use surface irrigation models to manage irrigation systems. The present field study deals with the evaluation of the Kostiakov infiltration parameters using water front advance information at ...
N. S. Raghuwanshi +3 more
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ANALYSIS AND DESIGN OF BORDER IRRIGATION SYSTEMS
Transactions of the ASAE, 2005Application efficiency (Ea) is the primary criterion for border irrigation design and management. The objective of this study is to analyze the behavior of the application efficiency function of border irrigation with respect to border length (L) and unit inlet flow rate (qo), given a target minimum application depth.
null D. Zerihun +3 more
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Border Irrigation Field Experiment. II: Salt Transport
Journal of Irrigation and Drainage Engineering, 2000This paper presents results from an experiment to measure the salt transport processes within a border-irrigated bay in northern Victoria, Australia, an area with shallow saline ground water and cracking soils. The overland flow and drainage salinity measurements showed that lateral surface washoff of salt from the soil surface was the main process of ...
Mathew Gilfedder +2 more
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Physical Model Study of Border-Strip Irrigation
Journal of the Irrigation and Drainage Division, 1973A physical model of an irrigation border (bay) is constructed and tested. Equations are developed which describe the profile of the water advancing down the border, the rates of advance, and recession after the inflow is cut off, in terms of inflow, infiltration, slope, and surface roughness. Where possible these equations are simplified to a form more
Graham A. Jobling, A.Keith Turner
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ANALYSIS AND DESIGN OF BORDER IRRIGATION SYSTEM
2002 Chicago, IL July 28-31, 2002, 2002In border irrigation, both time-based and distance-based cutoff criterion are used to time inflow cutoff. Each criterion has its own advantage and limitation. In this study, the advantages and limitations of each cutoff criterion are discussed. Using application efficiency as the primary design and management criterion, alternative optimality ...
null D. Zerihun +2 more
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Border Irrigation Advance and Ephemeral Flood Waves
Journal of the Irrigation and Drainage Division, 1972Movement and modification of an advancing front on an initially dry infiltrating surface is modeled mathematically by a kinematic description of surface flow and a kinematic shock. Criteria for the goodness of approximation are presented, and the model is shown to describe two common hydraulic problems; border irrigation advance and dry channel flood ...
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QUANTITATIVE MANAGEMENT VARIABLE EQUATIONS FOR IRRIGATION BORDERS
Applied Engineering in Agriculture, 1998Quantitative equations of the design parameters are proposed. The equations were obtained by initially simulating flow in free outflow borders with longitudinal slope and the inflow rate and time of cutoff were then fitted through multiple regression as a function of field length, field slope, roughness coefficient, and infiltration exponent and ...
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A mathematical model for border strip irrigation
Water Resources Research, 1983A kinematic model is developed to discuss surface irrigation when the infiltration function consists of a long‐time gravity term plus a short‐time capilliary or sorbtivity term. The corresponding model equations are solved either exactly or numerically, and several graphical solutions are presented.
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Hydrodynamics of Border Irrigation Advance
Transactions of the ASAE, 1972null Dennis C. Kincaid +1 more
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