Journal of Irrigation and Drainage Engineering: Recent submissions
Now showing items 3241-3260 of 3826
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Discussion of “<i>Transient Hydraulic Model for Simulating Canal‐Network Operation</i>” by F. N. Gichuki, W. R. Walker, and G. P. Merkley (January/February, 1990, Vol. 116, No. 1)
(American Society of Civil Engineers, 1992) -
Discussion of “<i>Unsteady Drawdown of Water Table</i>” by M. Emin Savci (July/August, 1990, Vol. 116, No. 4)
(American Society of Civil Engineers, 1992) -
Discussion of “<i>Rational Approach for Modifying Rotational Water Delivery Schedule</i>” by Sanjay Bhirud, N. K. Tyagi, and C. S. Jaiswal (September/October, 1990, Vol. 116, No. 5)
(American Society of Civil Engineers, 1992) -
Water‐Balance Model of Two Conservancies in Guyana
(American Society of Civil Engineers, 1992)A hydrological water‐balance model used for the Nanni swamps in Surinam is adjusted and applied to a similar swamp in coastal Guyana. A water balance study was performed in Guyana on two water conservancies; the Boe rasirie ... -
Hydrodynamic Furrow Irrigation Model with Specified Space Steps
(American Society of Civil Engineers, 1992)A complete hydrodynamic furrow irrigation model was developed that solves for time of advance as a function of distance. Solution of the system of finite‐difference equations is obtained with a shooting algorithm. After ... -
Feedback Control of Basin‐Irrigation System
(American Society of Civil Engineers, 1992)A number of methods developed for feedback control of surface‐irrigation systems are reviewed. In particular, the results of the application of estimation/optimization feedback control on a basin‐irrigation system are ... -
Drawdown Solutions with Variable Drainable Porosity
(American Society of Civil Engineers, 1992)Laboratory column studies are done to investigate the variation of drainable porosity in relation to water table depth. Corresponding functional relationships are developed between drainable porosity and water table depth. ... -
Optimal Irrigation Delivery System Design under Uncertainty
(American Society of Civil Engineers, 1992)The effects of various types of uncertainty in the design of hydraulic structures in an open‐channel system for irrigation water delivery are investigated. Uncertainty due to ambiguity in the values of system physical and ... -
Salinity of Rivers: Transfer Function‐Noise Approach
(American Society of Civil Engineers, 1992)The theory of transfer function‐noise (TFN) models is used in this work to study the flow‐salinity relationships at four gaging stations located on the Ebro river basin, in Spain. This technique, which relates an input to ... -
Identification of Control System for Canal with Night Storage
(American Society of Civil Engineers, 1992)One way to create night storage in an irrigation system is to use the supply canal for in‐line storage. Control of the canal system, however, will become much more difficult due to fluctuating water levels. In this paper, ... -
Irrigation Timing for Wheat Based on Climate, Crop, and Soil Data
(American Society of Civil Engineers, 1992)A user‐oriented technique for timing irrigation of wheat is presented. The technique is based on actual crop evapotranspiration, initial soil moisture in the top 0.6‐m profile, available water holding capacity of the top ... -
Bayesian Inference for Feedback Control. I: Theory
(American Society of Civil Engineers, 1992)The control of water‐resources systems can be extremely complicated because of the difficulty in accurately modeling such systems. Many systems are controlled manually by operators with subjective, ad hoc rules. Other ... -
Bayesian Inference for Feedback Control. II: Surface Irrigation Example
(American Society of Civil Engineers, 1992)Bayesian inference is applied to the real‐time feedback control of a basin irrigation system. Estimates of the Kostiakov k (infiltration parameter) and Manning n (Roughness parameter) are obtained during water advance so ... -
Discussion of “<i>Design Procedure for Flow over Side Weirs</i>” by Ali Uymaz and Roger H. Smith (January/February, 1991, Vol. 117, No. 1)
(American Society of Civil Engineers, 1992) -
Optimum Center‐Pivot Irrigation System Design with Tillage Effects
(American Society of Civil Engineers, 1992)A method is presented for designing the outer‐end sprinkler of a center‐pivot irrigation system to prevent surface runoff. The smallest wetted diameter, for which soil infiltration capacity equalled or exceeded nozzle ... -
Discussion of “<i>Drawdowns for Constant‐Discharge One‐Dimensional Leaky Aquifer</i>” by Louis H. Motz (May/June, 1990, Vol. 116, No. 3)
(American Society of Civil Engineers, 1992) -
Open‐Channel Flow Algorithm in Newton‐Raphson Form
(American Society of Civil Engineers, 1992)The standard step method is one of the most widely accepted procedures for computing open‐channel water surface profiles. Conventional computer models that use the standard step method often have cumbersome data requirements ... -
Discussion of “<i>Rating Correction for Lateral Settlement of Parshall Flumes</i>” by Steven R. Abt and Kenneth J. Staker (November/December, 1990, Vol. 116, No. 6)
(American Society of Civil Engineers, 1992) -
Design of Flood Protection for Transportation Alignments on Alluvial Fans
(American Society of Civil Engineers, 1992)The method of floodplain delineation on alluvial fans developed for the National Flood Insurance Program (NFIP) may be modified to provide estimates of peak flood flows of specified return periods at transportation alignments, ... -
Irrigation, Drainage, and Landscaping for Expansive Soil
(American Society of Civil Engineers, 1992)Expansive soils are known for their moisture sensitiveness—they will swell when given access to water and shrink when they dry out. For a shallow foundation, this causes heave during the rainy season and settlement during ...