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1 Zerihun, D.; Reddy, J. M.; Feyen, J.; Breinburg, G.. 1993. Design and management nomograph for furrow irrigation. Irrigation and Drainage Systems, 7(1):29-41.
(Location: IWMI-HQ Call no: PER Record No: H013383)
There exist capabilities for analyzing the behavior of surface flow and the ultimate distribution of infiltrated water in furrow irrigation. The corresponding synthesis, i.e., the selection of appropriate combinations of inflow rates, cutoff times and length of furrow - design and management, currently not so well established, is treated herein. A design-management nomograph is proposed for free draining graded furrows. This is a plot of efficiency, time of cutoff and uniformity coefficient contours each given on a length-flow rate space adjacent to one another, for a furrow with given infiltration characteristics, flow geometry, slope, roughness and required depth of application. The nomograph can be used to determine the combinations of length, time of cutoff and flow rate that would yield in optimum combination of efficiency and uniformity.
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