Journal of Irrigation and Drainage Engineering: Recent submissions
Now showing items 2281-2300 of 3826
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Grass Swale-Perforated Pipe Systems for Stormwater Management
(American Society of Civil Engineers, 2006)The performance and potential of perforated pipes for stormwater quantity and quality control is evaluated. The studied design consists of a grass swale underlain by a section of perforated pipe enclosed in an infiltration ... -
Simplified Kernel Method for Flow to Large Diameter Wells
(American Society of Civil Engineers, 2006)A computationally simple kernel method is proposed for obtaining drawdowns due to unsteady pumping of large diameter wells. The kernels can be worked out even on a hand-held calculator. The new method can also be used to ... -
Discussion of “Comparative Analysis of Hydraulic Calculation Methods in Design of Microirrigation Laterals” by Gürol Yildirim and Necati Ağiralioğlu
(American Society of Civil Engineers, 2006) -
Fuzzy Analysis of Slope-Area Discharge Estimates
(American Society of Civil Engineers, 2006)When velocity estimates of channel flows are not available, the slope-area method is widely used to make discharge estimates. The accuracy of such estimates depends on many factors but is generally believed to be low. In ... -
Discussion of “Determination of Length of a Horizontal Drain in Homogeneous Earth Dams” by Bhagu R. Chahar
(American Society of Civil Engineers, 2006) -
Optimal Reservoir Operation for Irrigation of Multiple Crops Using Genetic Algorithms
(American Society of Civil Engineers, 2006)This paper presents a genetic algorithm (GA) model for obtaining an optimal operating policy and optimal crop water allocations from an irrigation reservoir. The objective is to maximize the sum of the relative yields from ... -
Modeling Uncertainty in an Object-Oriented Reservoir Operations Model
(American Society of Civil Engineers, 2006)In recent years, reservoir management considerations have expanded to include environmental and recreational objectives, many of which are often difficult to quantify. With a larger set of operational objectives comes the ... -
Discussion of “Generalized Head-Discharge Equation for Flow over Sharp-Crested Inclined Inverted V-Notch Weir” by M. N. Shesha Prakash and A. V. Shivapur
(American Society of Civil Engineers, 2006) -
Closure to “Comparative Analysis of Hydraulic Calculation Methods in Design of Microirrigation Laterals” by Gürol Yildirim and Necati Ağiralioğlu
(American Society of Civil Engineers, 2006) -
Closure to “Determination of Length of a Horizontal Drain in Homogeneous Earth Dams” by Bhagu R. Chahar
(American Society of Civil Engineers, 2006) -
Simplified Procedure to Evaluate Head Losses in Drip Irrigation Laterals
(American Society of Civil Engineers, 2005)The lateral lines of a drip irrigation system consist of pressurized pipelines with inline or online emitters. Proper hydraulic design of drip laterals usually requires the accurate evaluation of the total head losses, ... -
Design of Hydraulically Efficient Power-Law Channels with Freeboard
(American Society of Civil Engineers, 2005)A power-law channel is a generalized form of the parabolic channel. The exponent of the governing equation is a variable that for certain maximum permissible side slopes can be determined by maximizing the cross-sectional ... -
Methodology for Estimating Specific Yield in Shallow Water Environment Using Continuous Soil Moisture Data
(American Society of Civil Engineers, 2005)A methodology for estimating specific yield in shallow water environments using continuous soil moisture data is introduced. An accurate estimate of specific yield is critical for management of water resources affecting ... -
Combination Subsurface Irrigation and Drainage Systems in North-Central South Dakota
(American Society of Civil Engineers, 2006)The 340,000 ha Lake Dakota Plain area in north-central South Dakota has the topographical and soil characteristics required for the use of combination subsurface drainage and irrigation systems. Corn yield data from a ... -
Rate and Volume of Stream Flow Depletion due to Unsteady Pumping
(American Society of Civil Engineers, 2005)Analytical but approximate methods are developed for obtaining pumping induced rate and volume of stream flow depletion, which can account for unsteady (any variation) pumping discharge and are also applicable for intermittent ... -
Estimation of Evapotranspiration of Different-Sized Navel-Orange Tree Orchards Using Energy Balance
(American Society of Civil Engineers, 2006)Crop evapotranspiration -
Evaluating Regional Solutions to Salinization and Waterlogging in an Irrigated River Valley
(American Society of Civil Engineers, 2006)Potential solutions to high soil salinity levels and waterlogging problems are investigated on a regional scale using calibrated finite-difference flow and mass transport modeling for a portion of the Lower Arkansas River ... -
Measuring On-Farm Irrigation Efficiency with Chloride Tracing under Deficit Irrigation
(American Society of Civil Engineers, 2005)Water is a limited resource in agricultural production in arid climates. Under such conditions, high irrigation efficiency can be obtained either through implementation of efficient irrigation systems such as drip or ... -
Total Friction Loss along Multiple Outlets Pipes with Open End
(American Society of Civil Engineers, 2006)This paper describes the derivation of the total direct and relative reduction factors for both discrete and continuous outflow along mixed service sections of close end multiple outlets pipes. Discrete outflow factors ... -
Optimal Design of Parabolic Canal Section
(American Society of Civil Engineers, 2005)Optimal design equations for a parabolic canal section are presented in this paper. The design equations for a minimum earthwork cost section and a minimum cost lined section are in explicit form and result in optimal ...