Journal of Irrigation and Drainage Engineering: Recent submissions
Now showing items 2381-2400 of 3826
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Closure to “Hydraulically Efficient Power-Law Channels” by Arif A. Anwar and Tonny T. de Vries
(American Society of Civil Engineers, 2004) -
Ramp Kernels for Aquifer Responses to Arbitrary Stream Stage
(American Society of Civil Engineers, 2004)Analytical expressions for ramp kernels (new kernels) for an improved convolution for obtaining aquifer responses, viz, groundwater head, rate, and cumulative volume of groundwater flow, to an arbitrary stage, are obtained. ... -
Closure to “History and Evaluation of Hargreaves Evapotranspiration Equation” by George H. Hargreaves and Richard G. Allen
(American Society of Civil Engineers, 2004) -
Wastewater Reuse Effects on Soil Hydraulic Conductivity
(American Society of Civil Engineers, 2004)The wastewater total suspended solids (TSS) concentration effects on the saturated hydraulic conductivity, -
Discussion of “Hydraulically Efficient Power-Law Channels” by Arif A. Anwar and Tonny T. de Vries
(American Society of Civil Engineers, 2004) -
Describing Near Surface, Transient Flow Processes in Unconfined Aquifers below Irrigated Lands: Model Application in the Western San Joaquin Valley, California
(American Society of Civil Engineers, 2004)In order to rigorously examine near surface, field to field interactions between irrigation management regimes and a shallow fluctuating water table, an enhanced deforming finite element (DFE) model was recently developed. ... -
Discussion of “History and Evaluation of Hargreaves Evapotranspiration Equation”by George H. Hargreaves and Richard G. Allen
(American Society of Civil Engineers, 2004) -
End Depth–Discharge Relation at Free Overfall of Trapezoidal Channels
(American Society of Civil Engineers, 2004)For steady flow near the free overfall (end section) of a horizontal trapezoidal channel, the velocity distribution is nonuniform and the streamlines are curved. An accurate relation between discharge rate and end depth ... -
Explicit Design of Commercial Pipes with No Secondary Losses
(American Society of Civil Engineers, 2004)This paper presents a direct solution technique derived by using a power law for the friction factor for three cases of pipe design. The parameters used in the form of the power law presented herein are allowed to vary ... -
Capillary Fringe and Unsaturated Flow in a Porous Reservoir Bank
(American Society of Civil Engineers, 2004)Steady, 2D Darcian seepage from a zero-depth reservoir into a homogeneous porous bank is studied analytically. Using the Green-Ampt assumption for hydraulic conductivity as a function of pressure and the Vedernikov model ... -
Monthly Water Resources and Irrigation Planning: Case Study of Conjunctive Use of Surface and Groundwater Resources
(American Society of Civil Engineers, 2004)The Tehran metropolitan area is one of the mega cities of the world and has an annual domestic water consumption close to one billion cubic meters. The sewer system mainly consists of traditional absorption wells. Therefore, ... -
Discharge Coefficient of a Triangular Side-Weir Located on a Curved Channel
(American Society of Civil Engineers, 2004)This study aims to obtain sharp crested triangular side-weirs discharge coefficients both in the straight channel and along the bend by using a total of 1,735 experiments. It was found that triangular side-weirs discharging ... -
Simplified Modeling of Irrigation Canals for Controller Design
(American Society of Civil Engineers, 2004)The integrator delay zero (IDZ) model presented by Litrico and Fromion is a simple way to model a canal for control purposes that extends the classical integrator delay model. This analytical model gives a very good frequency ... -
Gradually Varied Flow Computation in Cyclic Looped Channel Networks
(American Society of Civil Engineers, 2004)A novel and computationally efficient algorithm is presented to compute the water surface profiles in steady, gradually varied flows of open channel networks. This algorithm allows calculation of flow depths and discharges ... -
Temperature Adjustment for Reference Evapotranspiration Calculation in Central Arizona
(American Society of Civil Engineers, 2004)A key component in the calculation of reference crop evapotranspiration -
Discussion of “Equivalent Friction Factor Method for Hydraulic Calculation in Irrigation Laterals” by Pedro Vallesquino and Pedro L. Luque-Escamilla
(American Society of Civil Engineers, 2004) -
Design and Hydraulics of a Combined Storm Overflow Structure
(American Society of Civil Engineers, 2004)Storm overflow structures in combined sewers are used to separate sewage from storm water. For subcritical approach flow, sideweirs are currently used; however, they often behave hydraulically poor. This study was conducted ... -
Use of Genetic Algorithm in Optimization of Irrigation Pumping Stations
(American Society of Civil Engineers, 2004)Energy costs constitute the largest expenditure for nearly all water utilities worldwide and can consume up to 65% of a water utility’s annual operating budget. One of the greatest potential areas for energy cost savings ... -
New Policies are Needed to Encourage Improvements in Irrigation Management
(American Society of Civil Engineers, 2004)Innovations are needed in both the technological and policy dimensions of water resource management to achieve the gains in productivity required to feed the world’s increasing population. Scientists and engineers will ... -
Closure to “Determining Minor Head Losses in Drip Irrigation Laterals. II: Experimental Study and Validation” by Luis Juana, Leonor Rodrı´guez-Sinobas, and Alberto Losada
(American Society of Civil Engineers, 2004)