Journal of Irrigation and Drainage Engineering: Recent submissions
Now showing items 3361-3380 of 3826
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Drop Manholes in Supercritical Pipelines
(American Society of Civil Engineers, 1991)In urban drainage networks on steep terrain, drop manholes are often employed for energy dissipation and reduction of flow velocities. The hydraulic behavior of such circular manholes located between supercritical pipe ... -
SECTAR for Economically Optimal, Sustained Ground‐Water Yield Planning
(American Society of Civil Engineers, 1991)This paper presents an approach for computing economically optimal sustained yield ground‐water extraction strategies and supportable irrigated crop acreages. Computed regional strategies maximize the present value of net ... -
Dynamic‐Node‐Numbering Concept in Channel Network Model
(American Society of Civil Engineers, 1991)The Al‐Hassa Irrigation and Drainage Authority in The Kingdom of Saudi Arabia covers approximately 8,000 ha of cultivable land. To irrigate this project, a precast concrete open‐channel system has been in operation since ... -
Method for Determination of Hydraulic Conductivity in Unsaturated Porous Media
(American Society of Civil Engineers, 1991)A new procedure for in situ determination of saturated hydraulic conductivity of an initially unsaturated soil is proposed. The procedure is based on the measurement of the rise of a ground‐water mound in an initially ... -
Closure to “<i>Open Channel Flow through Transverse Floor Outlets</i>” by A. S. Ramamurthy, Duc Minh Tran, and L. B. Carballada (April, 1989, Vol. 115, No. 2)
(American Society of Civil Engineers, 1991) -
Discussion of “<i>Prediction of Class a Evaporation in Southwest Idaho</i>” by Clayton L. Hanson (April, 1989, Vol. 115, No. 2)
(American Society of Civil Engineers, 1991) -
Closure to “<i>Prediction of Class a Evaporation in Southwest Idaho</i>” by Clayton L. Hanson (April, 1989, Vol. 115, No. 2)
(American Society of Civil Engineers, 1991) -
Erratum: “Development of Low‐Discharge Baffle Sluice Modules” by P. K. Mishra, P. Larsen, and T. Satyanarayana (May/June, 1990, Vol. 116, No. 3)
(American Society of Civil Engineers, 1991) -
Subsurface Microirrigation with Effluent
(American Society of Civil Engineers, 1991)Field crops such as cotton, wheat, corn, and peas have been irrigated with treated domestic effluent for five years by a subsurface trickle system. For four years the experiments were conducted in the same field without ... -
Discussion of “<i>Open Channel Flow through Transverse Floor Outlets</i>” by A. S. Ramamurthy, Duc Minh Tran, and L. B. Carballada (April, 1989, Vol. 115, No. 2)
(American Society of Civil Engineers, 1991) -
Derivation of Infiltration Equation Using Systems Approach
(American Society of Civil Engineers, 1990)A general infiltration model is derived using a systems approach. The models of Horton, Kostiakov, Overton, Green and Ampt, and Philip are some of the example models that are shown as special cases of the general model. ... -
Evapotranspiration Estimation for Data‐Short Environment
(American Society of Civil Engineers, 1991)Evapotranspiration (ET) estimation has not been made for certain parts of the world, partially because some basic climatological data are not available. One alternative is to adopt the available ET data directly from other ... -
Drainage‐Subirrigation Effect on Water Quality in Georgia Flatwoods
(American Society of Civil Engineers, 1991)The effects of controlled‐drainage‐subirrigation (CD‐SI) systems on subsurface and outflow water quality must be evaluated before these systems can be promoted for use in the Georgia flatwoods region of the eastern Coastal ... -
Vapor‐Budget Measurement of Irrigation Evaporative Losses
(American Society of Civil Engineers, 1990)A vapor‐budget technique for measurement of short‐term evaporation from moist, rough surfaces (such as irrigated cropped areas) is developed based on the control volume concept. The control volume is specified so that the ... -
Discussion of “<i>Flow Measurements with Trapezoidal Free Overfall</i>” by Robert J. Keller and Soon S. Fong (February 1989, Vol. 115, No. 1)
(American Society of Civil Engineers, 1990) -
Closure to “<i>Flow Measurements with Trapezoidal Free Overfall</i>” by Robert J. Keller and Soon S. Fong (February 1989, Vol. 115, No. 1)
(American Society of Civil Engineers, 1990) -
Rating Correction for Lateral Settlement of Parshall Flumes
(American Society of Civil Engineers, 1990)A 3‐in. (7.62‐cm) Parshall flume is installed in a channel and flow rates are measured with lateral flume crest slopes of 0, 3.6, 6.5, 9.0, 13.3, -
Performance Measures for Evaluation of Irrigation‐Water‐Delivery Systems
(American Society of Civil Engineers, 1990)Performance measures are developed that facilitate analysis of irrigation‐water delivery systems in terms of adequacy, efficiency, dependability, and equity of water delivery. The measures provide a quantitative assessment ... -
Discussion of “<i>Flow Measurements with Trapezoidal Free Overfall</i>” by Robert J. Keller and Soon S. Fong (February 1989, Vol. 115, No. 1)
(American Society of Civil Engineers, 1990) -
Space Solution of Kinematic‐Wave Model by Time Iteration
(American Society of Civil Engineers, 1991)A kinematic-wave model was developed to solve for time to advance to specified locations along the furrow where infiltration was measured as a function of ponding time and wetted perimeter. Time step increased during advance ...