Journal of Irrigation and Drainage Engineering: Recent submissions
Now showing items 2061-2080 of 3826
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New Weighing Method to Measure Shoot Water Interception
(American Society of Civil Engineers, 2008)The need exists to develop a method that can quantitatively measure water interception from plant shoots. This paper describes a new method for measuring canopy water interception. Corn ( -
Hydraulic Modeling of an Automatic Upstream Water Level Control Gate for Submerged Flow Conditions
(American Society of Civil Engineers, 2008)The article proposes a mathematical model of an automatic upstream water level control gate designed to operate under free and submerged flow conditions, called the Vlugter gate. This automatic gate controls the upstream ... -
Development of Simplified Solutions for Modeling Recession in Basins
(American Society of Civil Engineers, 2008)In irrigation basins the decrease in the gradient of the water-surface elevation following inflow cutoff often leads to reduced rate of convergence, increased computational time, and reduced robustness of the numerical ... -
Fringing Field Sensor Using a Circuit-Modulated Parameter for Measuring Water Content in a Soil Sample
(American Society of Civil Engineers, 2008)Currently used dielectric spectroscopy methods for measuring soil water contents are highly susceptible to their electrical conductivities. Some of the existing methods are double-plate capacitance sensors. A novel technique ... -
Automation of a Center Pivot Using the Temperature-Time-Threshold Method of Irrigation Scheduling
(American Society of Civil Engineers, 2008)A center pivot was completely automated using the temperature-time-threshold method of irrigation scheduling. An array of infrared thermometers was mounted on the center pivot, and these were used to remotely determine the ... -
Accuracy of Global Microirrigation Distribution Uniformity Estimates
(American Society of Civil Engineers, 2008)Emitter pressures and flow rates were systematically and extensively sampled in one drip and one microspray field. The data distributions are presented. The accuracy of rapid (limited samples) evaluation pressure sampling ... -
Determining Operating Inlet Pressure Head Incorporating Uniformity Parameters for Multioutlet Plastic Pipelines
(American Society of Civil Engineers, 2008)An important objective of a microirrigation system is to determine the proper operating inlet pressure head, ensuring the desired level of water application uniformity as well as the allowable pressure head variation along ... -
Rapid Evaluations of Anticlogging Performance of Drip Emitters by Laboratorial Short-Cycle Tests
(American Society of Civil Engineers, 2008)Emitter clogging is the most annoying problem that restrains the development of drip irrigation technologies, but so far, there have been no effective evaluation methods for the anticlogging performance of drip emitters. ... -
Estimating Suspended Sediment Concentration Using Turbidity in an Irrigation-Dominated Southeastern California Watershed
(American Society of Civil Engineers, 2008)This study investigates the feasibility of using turbidity -
Discussion of “Storm-Water Predictions by Dimensionless Unit Hydrograph” by James C. Y. Guo
(American Society of Civil Engineers, 2008) -
Head-Discharge Equation for Sharp-Crested Polynomial Weir
(American Society of Civil Engineers, 2008)Polynomial weirs can be applied in agricultural and municipal engineering to produce a wide range of head-discharge behavior, including the proportional (linear) characteristics of the Sutro weir. This note describes a ... -
Closure to “Storm-Water Predictions by Dimensionless Unit Hydrograph” by James C. Y. Guo
(American Society of Civil Engineers, 2008) -
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Application of SEBAL Model for Mapping Evapotranspiration and Estimating Surface Energy Fluxes in South-Central Nebraska
(American Society of Civil Engineers, 2008)Knowledge of spatiotemporal distribution of evapotranspiration (ET) on large scales, as quantified by satellite remote sensing techniques, can provide important information on a variety of water resources issues such as ... -
Discussion of “Groundwater Flow and Contaminant Transport Simulation with Imprecise Parameters” by Ram Kailash Prasad and Shashi Mathur
(American Society of Civil Engineers, 2008) -
Genetic Programming Approach for Prediction of Local Scour Downstream of Hydraulic Structures
(American Society of Civil Engineers, 2008)This is a pioneer study that presents genetic programming (GP) as a new tool for prediction of local scour downstream of grade-control structures. The objective of this study is to provide an alternative formulation to ... -
Closure to “Groundwater Flow and Contaminant Transport Simulation with Imprecise Parameters” by Ram Kailash Prasad and Shashi Mathur
(American Society of Civil Engineers, 2008) -
Time of Concentration Estimated Using Watershed Parameters Determined by Automated and Manual Methods
(American Society of Civil Engineers, 2008)The time of concentration -
Synthesis of Unit Hydrographs from a Digital Elevation Model
(American Society of Civil Engineers, 2008)Characterization of hydrologic processes of a watershed requires estimation of the specific time-response characteristics of the watershed. In the absence of observations these characteristics are estimated from watershed ... -
Groundwater Quality Evaluation for Productive Uses— The Afram Plains Area, Ghana
(American Society of Civil Engineers, 2008)Groundwater is the most widely used water resource in the Afram Plains area, Ghana. The objective of this study was to determine the distribution of fluoride, sodium adsorption ratio (SAR), and salinity (EC) in groundwater ...