OPTIMAL IRRIGATION CANAL SECTIONS

The minimum area, or the maximum velocity cross section, is generally adopted for lined irrigation canals. Such a section is economically mo st efficient because it involves the least amount of earthwork and the least lining surface. For various practical sections there exist equa tions between the design variables. Because the design variables thems elves are unknown, such relationships cannot be applied directly. In t he present investigation, explicit equations for the design variables of various irrigation canal sections have been obtained. It is hoped t hat these equations will be useful to the engineer engaged in the desi gn of lined canals.