Journal of Irrigation and Drainage Engineering: Recent submissions
Now showing items 3061-3080 of 3826
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Agroforestry Drainage Management Model. I: Theory and Validation
(American Society of Civil Engineers, 1994)The cultivation of eucalyptus trees is being recommended to lower the shallow ground‐water level and to reuse saline‐subsurface drainage waters from tile‐drained cropland in drainage‐impacted areas in California's San ... -
Transient Canal Seepage to Sloping Aquifer
(American Society of Civil Engineers, 1994)The problem of seepage from an unlined earthen canal is considered. The phreatic surface generated on the two sides of the canal is characterized by the nonlinear Boussinesq equation incorporating the slope element. A ... -
Ground‐Penetrating Radar for Salt‐Affected Soil Assessment
(American Society of Civil Engineers, 1994)Thousands of free‐flowing wells, drilled in the 1940s and 50s to supply Florida's agricultural needs, have become sources of saline intrusion into freshwater aquifers and sources of salt‐affected soils throughout the state. ... -
Constant Time Interval Hortonian Infiltration Model
(American Society of Civil Engineers, 1994)Natural rainfall rate patterns are highly variable. Existing Hortonian infiltration models are not designed specifically to work with such rainfall rate patterns. Thus, for practical applications the models have to be ... -
Results of Parshall Flume Tests
(American Society of Civil Engineers, 1994)Presented are: (1) A reanalysis of Parshall's original experimental data obtained for the improved Venturi (Parshall) flume; and (2) a reanalysis of data obtained by the writer during model tests of the Parshall flumes at ... -
Editorial
(American Society of Civil Engineers, 1994) -
Simple Method for Identification of Border Infiltration and Roughness Characteristics
(American Society of Civil Engineers, 1994)Roughness and infiltration parameters in border irrigation are evaluated with reasonable accuracy and simplicity by iterative analysis of advance‐trajectory data and surface‐depth measurements at a station at or near the ... -
Correct Form of Hall Technique for Border Irrigation Advance
(American Society of Civil Engineers, 1994)The Hall technique for computing stream advance down an irrigated border strip is shown to be inconsistent in the selection of numerical parameters for approximating infiltrated volume. This inconsistency leads to violation ... -
Safety Grates in Supercritical Channels
(American Society of Civil Engineers, 1994)In areas of steep terrain, concrete lined channels designed for supercritical flow are often used to convey stormwaters. During dry conditions, concrete channels attract playing animals, children, and adults. These channels ... -
Closure to “Probabilistic Design of Open Drainage Channels” by Said M. Easa (November/December, Vol. 118, No. 6)
(American Society of Civil Engineers, 1994) -
Modeling Heavy Metal (Cadmium) Uptake by Soil‐Plant Root System
(American Society of Civil Engineers, 1994)Among various toxic substances that contaminate plants and enter the food chain, thereby posing health problems to human beings, heavy metals are particularly severe in their action. The behavior of heavy metals present ... -
Design for Tunnel‐Type Sediment Excluder
(American Society of Civil Engineers, 1994)A tunnel‐type sediment excluder is commonly used at the headwork of a canal for preventing excess sediment from entering the off‐taking canal. In such excluders, the sediment‐laden water, which flows mainly near the bed, ... -
Evapotranspiration by Young Florida Flatwoods Citrus Trees
(American Society of Civil Engineers, 1994)Twenty‐one drainage lysimeters were installed in 1988 to measure water balance parameters for citrus trees. The lysimeters were designed to simulate the high water‐table conditions that exist for the more than 150,000 ha ... -
Automated Field Irrigation System Using Side Weirs
(American Society of Civil Engineers, 1994)An automated side weir irrigation system is designed using the concept of constant specific energy. The characteristics of the spatially varied flow along a main channel with multiple side weir outlets are analyzed to ... -
General Formulation of Best Hydraulic Channel Section
(American Society of Civil Engineers, 1994)The best hydraulic channel section is determined by using Lagrange's method of undetermined multipliers. For a given flow, roughness coefficient, and longitudinal slope, this method optimizes the channel section by minimizing ... -
Discussion of “Probabilistic Design of Open Drainage Channels” by Said M. Easa (November/December, Vol. 118, No. 6)
(American Society of Civil Engineers, 1994) -
Discussion of “Flow Capacity Through Wide and Submerged Vegetal Channels” by M. W. Abdelsalam, A. F. Khattab, A. A. Khalifa, and M. F. Bakry (September/October, 1992, Vol. 118, No. 5)
(American Society of Civil Engineers, 1994) -
Seepage Effects on Sand‐Bed Channels
(American Society of Civil Engineers, 1994)Experiments were conducted to find the effects of seepage on flow over a sand bed in a straight rectangular flume under two conditions: (1) When the channel bed is plane, horizontal, and nontransporting; and (2) when the ... -
Computer Modeling of Side‐Flow Weirs
(American Society of Civil Engineers, 1993)A new computational procedure is presented that addresses the complex phenomena found in declining‐flow regimes and does not require that the boundary conditions of the declining‐flow segment be defined. These conditions ... -
Design of Agricultural Drainage with Adaptive Irrigation Management
(American Society of Civil Engineers, 1994)This paper describes a new approach to designing field‐scale irrigation and drainage systems in arid irrigated areas. This approach allows for a drainage design that can adjust to irrigation schedules to alleviate waterlogging ...