Journal of Irrigation and Drainage Engineering: Recent submissions
Now showing items 1421-1440 of 3826
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Conversion of the Modified Kovács Model Parameters to the Brooks and Corey and van Genuchten Model Parameters for the Water Retention Curve of Sandy and Silty Soils
(American Society of Civil Engineers, 2013)The modified Kovács (MK) model is a versatile and practical tool to estimate the water retention curve (WRC) of soils from their basic properties. However, the MK model has not yet been introduced in many codes or analytical ... -
Discussion of “Hydraulic and Statistical Analyses of Design Emission Uniformity of Trickle Irrigation Systems” by Jafar Safaa Noori and Hayder A. Al Thamiry
(American Society of Civil Engineers, 2013) -
Design of Nonzero Uniformly Sloping Laterals in Trickle Irrigation Systems
(American Society of Civil Engineers, 2013)An analytical method was developed to design evenly sloping, pressurized, nontapered, multiple-outlet pipes. Assuming spatiotemporal continuity of emitter flow rates, the approach was derived from the solution of analytical ... -
Analytical Determination of Distribution Uniformity for Microirrigation Tapered Laterals Laid on Uphill and Horizontal Slopes
(American Society of Civil Engineers, 2013)The uniform distribution of water delivered through microirrigation emitters on a lateral line is an important objective that greatly affects a system’s efficiency. Among the various uniformity parameters, distribution ... -
Parapet Wall Effect on Piano Key Weir Efficiency
(American Society of Civil Engineers, 2013)The piano key weir is a cost-effective solution for rehabilitation as well as for new dam projects with a high level of constraints (e.g., limited space, high specific flood discharge, small reservoir level variation). ... -
Revisiting the Energy-Momentum Method for Rating Vertical Sluice Gates under Submerged Flow Conditions
(American Society of Civil Engineers, 2013)Submerged sluice gates may be used as discharge measuring structures in irrigation channels. One commonly used model to predict discharge under submerged gates is based on the simultaneous solution of the energy and momentum ... -
Hydraulic Design and Analysis of Labyrinth Weirs. II: Nappe Aeration, Instability, and Vibration
(American Society of Civil Engineers, 2013)Nappe behavior should be considered in the design of labyrinth weirs to ensure hydraulic optimization and to account for potential vibrations, pressure fluctuations, noise, and flow surging. Information regarding nappe ... -
Discussion of “Experimental Studies on Flow over Labyrinth Weir” by B. V. Khode, A. R. Tembhurkar, P. D. Porey, and R. N. Ingle
(American Society of Civil Engineers, 2013) -
Rapid Prediction of Hydraulic Performance for Emitters with Labyrinth Channels
(American Society of Civil Engineers, 2013)Hydraulic performance of emitters with labyrinth channels is a primary factor that designers need to consider, and rapid prediction of hydraulic performance is very helpful for an emitter’s structural design. In this study, ... -
Actual Crop Evapotranspiration and Alfalfa- and Grass-Reference Crop Coefficients of Maize under Full and Limited Irrigation and Rainfed Conditions
(American Society of Civil Engineers, 2013)The evapotranspiration crop coefficients ( -
New Stage-Discharge Relationships for Radial Gates
(American Society of Civil Engineers, 2013)Calibration of gates under free-flow and submerged-flow regimes is a classical hydraulic problem. In this paper, dimensional analysis was applied to investigate both free- and submerged-flow conditions through a radial ... -
Discussion of “Groundwater Mound due to Artificial Recharge from Rectangular Areas” by Sushil K. Singh
(American Society of Civil Engineers, 2013) -
Generalized Analytical Solutions for Alternate and Sequent Depths in Rectangular Channels: Nonuniform Velocity
(American Society of Civil Engineers, 2013)Novel generalized analytical solutions, in closed form, of hydraulic-energy and hydraulic-force equations governing the flow in rectangular open channels are derived considering the nonhydrostatic pressure and nonuniform ... -
Hydraulic Design and Analysis of Labyrinth Weirs. I: Discharge Relationships
(American Society of Civil Engineers, 2013)A method is presented for the hydraulic design and analysis of labyrinth weirs based upon the experimental results of physical modeling. Discharge coefficient data for labyrinth weirs with quarter-round and half-round crest ... -
Examination of the Material Found in the Pore Spaces of Two Permeable Pavements
(American Society of Civil Engineers, 2013)Clogging of pore space is the leading cause of failure of permeable pavements. A study conducted at Villanova University on two permeable pavements, porous asphalt and pervious concrete, endeavored to answer the question ... -
Discussion of “Resistance to Shallow Uniform Flow in Small, Riprap-Lined Drainage Channels” by David C. Froehlich
(American Society of Civil Engineers, 2013) -
One-Dimensional Coupled Model of Surface Water Flow and Solute Transport for Basin Fertigation
(American Society of Civil Engineers, 2013)A highly efficient and accurate numerical model of surface water flow and solute transport is useful in the design and evaluation of a basin fertigation system. In this study, a coupled model of surface water flow and ... -
Response Time of a Canal Pool for Scheduled Water Delivery
(American Society of Civil Engineers, 2013)Estimating the response time of a canal is essential for the open-loop control of an irrigation canal since upstream flow releases must be anticipated to satisfy scheduled demands at irrigation outlets. The authors consider ...