Journal of Irrigation and Drainage Engineering: Recent submissions
Now showing items 2041-2060 of 3826
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Hydraulics of Multibarrel Culverts under Inlet Control
(American Society of Civil Engineers, 2008)The hydraulic characteristics of multi- and single-barrel circular culverts were compared in this study. One-, two-, and three-barrel culverts configurations, operating under inlet control, were tested in the laboratory ... -
Discussion of “Approximation of Well Function for Large Diameter Wells” by Sushil K. Singh
(American Society of Civil Engineers, 2008) -
Most Hydraulically Efficient Standard Lined Canal Sections
(American Society of Civil Engineers, 2008)Cross-sectional dimensions of the most hydraulically efficient lined canals are evaluated based on an analysis of a generalized trapezoidal shape that reduces to two standard sections with rounded bottom vertices used in ... -
Explicit Power Formula for the Darcy–Weisbach Pipe Flow Equation: Application in Optimal Pipeline Design
(American Society of Civil Engineers, 2008)Although the Darcy–Weisbach equation combined with the Colebrook–White semitheoretical formula for calculating the friction coefficient is a highly accurate generalized pipe-water flow resistance equation, most users prefer ... -
Drought Mitigation through Long-Term Operation of Reservoirs: Case Study
(American Society of Civil Engineers, 2008)Dealing with climate variability in a river basin presents many challenges in managing a water resources system. Occurrence of severe and persistent droughts deplete reservoirs storage to critical levels, which may lead ... -
Study of Variation of Saturated Hydraulic Conductivity with Time
(American Society of Civil Engineers, 2008)The variation of the saturated hydraulic conductivity with time, as a function of temperature, has been studied involving field measurement at the College of Aboureyhan Research farm. The College of Aboureyhan is a part ... -
Testing Reference Evapotranspiration Estimation Methods Using Evaporation Pan and Modeling in Maritime Region of Canada
(American Society of Civil Engineers, 2008)Four methods of estimating daily reference evapotranspiration -
Simple Equation to Estimate Reference Evapotranspiration from Evaporation Pans Surrounded by Fallow Soil
(American Society of Civil Engineers, 2008)Reliable estimates of reference evapotranspiration -
Modeling Soil Water Uptake by Plants Using Nonlinear Dynamic Root Density Distribution Function
(American Society of Civil Engineers, 2008)Water uptake by plants is one of the major components of water balance of the vadose zone that greatly influences the contaminant and moisture movement in variably saturated soils. In this study, a nonlinear macroscopic ... -
Integrated Agro-Economic Approach to Deficit Irrigation on Lettuce Crops in Sicily (Italy)
(American Society of Civil Engineers, 2008)The effect of four different irrigation levels on the marketable yield and economic return of summer-growth lettuce was evaluated during 2005 and 2006 in Eastern Sicily, Italy. The viability of deficit irrigation was ... -
Operational Analysis of Water Application of a Sprinkler Irrigation System Installed in a Golf Course: Case Study
(American Society of Civil Engineers, 2008)Popup sprinkler irrigation systems are usually installed in golf courses, orchards, and lawns. Evaluation of these systems is considered essential to identifying any necessary improvements. To this end some performance ... -
Numerical Simulation of Groundwater Flow with Gradually Increasing Heterogeneity due to Clogging
(American Society of Civil Engineers, 2008)Well injection replenishes depleting water levels in a well field. Observation well water levels some distance away from the injection well are the indicators of the success of a well injection program. Simulation of the ... -
Selection of Superior Tillage and Fertilizer Practices Based on Rainfall and Soil Moisture Effects on Pearl Millet Yield under Semiarid Inceptisols
(American Society of Civil Engineers, 2008)Based on seven field experiments of pearl millet with nine treatment combinations of tillage and fertilizer nutrients conducted during 2000–2006 in a semiarid inceptisol at Agra, an assessment is made in this paper about ... -
Optimal Design of a Settling Basin for a Small-Scale Drainage Area
(American Society of Civil Engineers, 2008)This paper develops a nonlinear programming model to optimally design a settling basin for a small-scale drainage area with a minimum total cost. It is assumed that the shape of the settling basin is rectangular parallelepiped, ... -
Estimating Aquifer Parameters from Early Drawdowns in Large-Diameter Wells
(American Society of Civil Engineers, 2008)The existing equation applicable for large diameter wells in confined aquifers is transformed into a convenient form and a set of semilogarithmic diagnostic curves is developed for identifying the aquifer parameters (storage ... -
Flooding Probability-Based Optimal Design of Trapezoidal Open Channel Using Freeboard as a Design Variable
(American Society of Civil Engineers, 2008)A flooding probability based cost effective design of open channel section has been proposed using freeboard as an additional design variable. The freeboard of the channel is calculated based on the flooding probability ... -
Simulating the Well Function for Large-Diameter Wells Using MODFLOW
(American Society of Civil Engineers, 2008)An approach for incorporating large-diameter wells into MODFLOW is presented. A transformation of transmissivity in the flow field is devised to simulate the well function for a large-diameter wells. Transformations for ... -
Simplified Design of Hydraulically Efficient Power-Law Channels with Freeboard
(American Society of Civil Engineers, 2008)A power-law channel section is very versatile. It can model a wide range of familiar man-made or natural channel shapes. However estimating the wetted perimeter of a power-law channel section is difficult. The problem gets ... -
Simulation of Varada Aquifer System for Sustainable Groundwater Development
(American Society of Civil Engineers, 2008)Groundwater flow modeling has been used extensively worldwide with varying degrees of success. The ability to predict the groundwater flow is critical in planning and implementing groundwater development projects under ... -
Conversion from Discharge to Gate Opening for the Control of Irrigation Canals
(American Society of Civil Engineers, 2008)The paper reviews several methods to convert discharge into gate opening. A control algorithm for one or several reaches of an irrigation canal sometimes uses a discharge as the control action variable even though the ...