Journal of Irrigation and Drainage Engineering: Recent submissions
Now showing items 3541-3560 of 3826
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Agricultural Drainage Water—How Should it be Regulated in California?
(American Society of Civil Engineers, 1989)The problem of managing the saline agricultural drainage water drained from San Joaquin Valley California farmland has confronted farmers and water developers for years. As the irrigated area in the valley has expanded, ... -
Characteristics and Spatial Variability of Droughts in Idaho
(American Society of Civil Engineers, 1989)An application of run theory to annual streamflow sequences in Idaho permits the assignment of return periods to historical drought events, based on the statistical characteristics of the streamflow record. For 63 stations ... -
Defining Phreatic Surface for Heterogeneous Aquifers
(American Society of Civil Engineers, 1988)Dupuit's formula is generalized to define the phreatic (free) surface for a porour media that consisted of vertical layers of different thickness and hydraulic properties. The approach results in transforming the heterogeneous ... -
Discussion of “<i>Time of Concentration of Overlanb Flow</i>” by A. Osman Akan (November, 1986, Vol. 112, No. 4)
(American Society of Civil Engineers, 1988) -
Allocation of Incremental Irrigation Benefits
(American Society of Civil Engineers, 1988)Methods of calculating irrigation project profits are described systematically. The combined effects of irrigation and agricultural technical measures (before and after irrigation) increase production. Therefore, the ... -
Future Legal Regulation of Weather Modification
(American Society of Civil Engineers, 1988)Information about future as well as current legal regulation of weather modification is an important element in planning and operating weather modification projects. Government agencies have made and will continue to make ... -
Editor's Note Selenium—How Bad Is It?
(American Society of Civil Engineers, 1989) -
Weather Input for Nonpoint‐Source Pollution Models
(American Society of Civil Engineers, 1988)Three stochastic weather models are developed for use with nonpoint‐source pollution simulation models that require sequences of daily precipitation and mean daily temperature. Two simple models have parameters that can ... -
Hydrologic Balance Model Using Neutron Probe Data
(American Society of Civil Engineers, 1988)A hydrologic balance model has been developed that employs neutron probe readings for soil moisture content coupled with measured amounts of precipitation and irrigation. The major objective of the model is to estimate ... -
Flow Measurement with Trapezoidal Free Overfall
(American Society of Civil Engineers, 1989)The trapezoidal free overfall is analyzed by the one‐dimensional momentum equation, including an assumed pressure distribution at the brink. The pressure distribution is based on previous measurements in rectangular and ... -
Erratum: “Green‐Ampt—Model to Predict Surge Irrigation Phenomena” by M. A. Killen and D. C. Slack (November, 1987, Vol. 113, No. 4)
(American Society of Civil Engineers, 1988) -
Effect of Trajectory Angle on Performance of Sprinklers in Wind
(American Society of Civil Engineers, 1988)The effect of changing the trajectory angle of a medium‐sized irrigation sprinkler operating in windy conditions has been studied using a computersimulation model. The model, which has been verified both in still air and ... -
Stochastic Forecast of Water Losses
(American Society of Civil Engineers, 1988)For the purpose of irrigation and water resources planning, it is important to know the water loss for a drainage basin. Unfortunately individual measurements of elements of the total water loss are not realistic, at least ... -
Closure to “<i>Furrow Irrigation Simulation Time Reduction</i>” by Mohammad Rayej and Wesley W. Wallender (June, 1985, Vol. 111, No. 2)
(American Society of Civil Engineers, 1988) -
Flow of Water Through Root‐Soil Environment
(American Society of Civil Engineers, 1988)A model is developed for simulating the vertical movement of water through a crop's root system. The root‐water flow model is then coupled to a variably‐ saturated flow model via a root extraction term that is a function ... -
On‐Farm Application System Design and Project‐scale Water Management
(American Society of Civil Engineers, 1988)Project‐scale optimal on‐farm designs considering total water availability and also the variability in the on‐farm parameters are obtained using a two‐stage programming approach in a mode of maximizing the net benefits ... -
Explicit Solution to Green‐Ampt Equation for Nonuniform Soils
(American Society of Civil Engineers, 1988)The solution for accumulated infiltration using the Green-Ampt equation requires an iterative solution. By using a power series approximtion to a logarithmic term, an equation has been developed to directly calculate the ... -
Editor's Page: Proposal for a New ASCE Hydrologic Engineering Division
(American Society of Civil Engineers, 1988) -
Time Solution of Kinematic‐Wave Model with Stochastic Infiltration
(American Society of Civil Engineers, 1988)A kinematic‐wave furrow model with spatial variability of infiltration is developed to solve directly for advance times. In addition, infiltration varies with wetted perimeter. During advance, the system of nonlinear ...