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AHMADU BELLO UNIVERSITY, ZARIA DEPARTMENT OF AGRICULTURAL ENGINEERING DEVELOPMENT OF DESIGN PROCEDURE FOR BORDER IRRIGATION SYSTEM
Abstract:
A design procedure was developed for border irrigation based on the need to have very high efficiencies of water distribution while at the same time maintaining an acceptable degree of water application efficiency. The water application efficiency for the design was estimated from the analysis of a border strip in which a cut back flow was not used. The required time of advance was estimated from the analysis of the advance and recession functions, by ensuring that the advance and recession curves be parallel. The desired initial flow rate was estimated from the solution of two standard advance equations, and limiting the advance estimate to an error of + 2% relative to the expected advance. The performance evaluations on the border strips in current use were in general satisfactory. The analysis in this study also indicates that a unit stream size of 2.5 l/s/m will give an acceptable field application efficiency. It is therefore concluded that the unit stream size be kept at 2.5 l/s/m for border slope of 0.0/2 percent obtained from border strip 3.2 – 3,
AHMADU BELLO UNIVERSITY, ZARIA DEPARTMENT OF AGRICULTURAL ENGINEERING DEVELOPMENT OF DESIGN PROCEDURE FOR BORDER IRRIGATION SYSTEM
