Journal of Irrigation and Drainage Engineering: Recent submissions
Now showing items 3761-3780 of 3826
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Dimensionless Runoff Curves for Irrigation Borders
(American Society of Civil Engineers, 1984)Nondimensional runoff curves useful in the design of reuse systems are presented for free outflow irrigation borders. Pertinent open channel variables affecting runoff in border irrigation, including inflow rate, surface ... -
Water Use Planning for Alkali Soils Under Reclamation
(American Society of Civil Engineers, 1984)A method to determine optimal water use in alkali soils under reclamation is developed. The procedure involves a deterministic linear programming model for allocation of surface and ground water for irrigation of crops ... -
Minimizing Capital Costs of Multi‐outlet Pipelines
(American Society of Civil Engineers, 1984)A design procedure is presented for minimizing the capital cost of multiple‐outlet pipelines which are composed of more than one diameter. The procedure assumes uniform slope, equal outlet spacing, and equal outlet discharge ... -
2‐D Infiltration Equations for Furrow Irrigation
(American Society of Civil Engineers, 1984)Two‐dimensional (2‐D) infiltration equations for furrow irrigation expressed in explicit algebraic forms are developed and based on four consecutive time intervals which were derived in a previous study (1). From another ... -
Suitability of Reduced Pressure Center‐Pivots
(American Society of Civil Engineers, 1984)Selection criteria for reduced pressure center‐pivot irrigation systems are developed. An analysis of the combined effects of the application rate characteristics or center‐pivot irrigation systems and the Soil Conservation ... -
Hydraulics of Perforated Irrigation Trail Tube
(American Society of Civil Engineers, 1984)Replacing the sprinklers on a center pivot irrigation system with perforated, polyflex tubes converts a sprinkler system to a trailing tube system. Such a system is similar to a traveling trickle irrigation system. The ... -
Performance of Stationary Gun Irrigation Systems
(American Society of Civil Engineers, 1984)The field performance of stationary giant gun irrigation systems is evaluated from the results of 70 distribution tests conducted in the interior of British Columbia, Canada. Three measures of field performance are ... -
Supplemental Irrigation Storage Reliability
(American Society of Civil Engineers, 1984)A computer simulation model is used to evaluate the risk of having insufficient water for supplemental irrigation. The model simulates the daily operations of a system consisting of a watershed, pond, and irrigation plot. ... -
Design Nomographs for Trickle Irrigation Systems
(American Society of Civil Engineers, 1984)Nomographs relating discharge rate, plant uptake and soil water potential at a reference point are developed for trickle irrigation systems. The hydraulic conductivity K is assumed to be related to pressure head h by -
Spatial Variability of Runoff
(American Society of Civil Engineers, 1984)Forty contiguous plots (each -
Rectangular Measuring Flumes for Lined and Earthen Channels
(American Society of Civil Engineers, 1984)Good water management in irrigated agriculture requires that irrigation water be accurately measured. Presented herein are design procedures and rating tables for modified broad‐crested weirs (which act hydraulically as ... -
Status of Irrigation and Drainage Research in the United States
(American Society of Civil Engineers, 1984)High priority research objectives for irrigation and drainage in the United States are identified. These include: (1) Development of more efficient irrigation distribution and on‐farm systems and management practices to ... -
Closure to “<i>Optimal Design of Small Reservoir Systems</i>” by Prem N. Sharma and Otto J. Helweg (December, 1982)
(American Society of Civil Engineers, 1983) -
Revised Technique of Photographic Data Acquisition
(American Society of Civil Engineers, 1983)A previously reported photographic recording device has been modified to accommodate available equipment and conditions. A battery operated system for tripping the shutter of an automatic advance camera, instead of a ... -
Estimation of Soil Erosion in India
(American Society of Civil Engineers, 1983)Soil erosion is a serious problem in India. In the absence of precise estimates of total erosion in the country, this paper presents a method to arrive at a first estimate of soil erosion, sediment loads of rivers and ... -
Irrigation Water Delivery Performance
(American Society of Civil Engineers, 1984)A number of delivery sites within an irrigation district were monitored in order to determine the amount of variability in flow rate during each water delivery. The coefficient of variation (CV) of instantaneous (1/2 hour) ... -
Modeling Water Demands of Irrigation Projects
(American Society of Civil Engineers, 1983)A simulation model for assessing the water demands of large irrigation areas is developed and applied to the mid‐Canterbury region of New Zealand. Observations from historical water use patterns provide a basis for demand ... -
Kinematic‐Wave Furrow Irrigation Model
(American Society of Civil Engineers, 1983)A kinematic‐wave model of furrow irrigation under both continuous and surged flow management was developed and verified. Numerical solution of the differential continuity equation is accomplished with a Eulerian first‐order ... -
Watershed Responses to Conservation Measures
(American Society of Civil Engineers, 1984)In Doon Valley, India, when a natural forest watershed open to grazing is deforested and cultivated, volume and peak rates of runoff were higher by 15% and 72%, respectively. When the agricultural watershed is treated with ... -
Discussion of “<i>Optimal Design of Small Reservoir Systems</i>” by Prem N. Sharma and Otto J. Helweg (December, 1982)
(American Society of Civil Engineers, 1983)