Semiautomation of Irrigated Basins and Borders: I. Single-function Turnout Gates

Two types of single-function, drop-closed gates for semiautomating irrigated basin and border systems are described. Gate design, construction, and operational information are presented. Gates for both rectangular and pipe turnout openings were tested and evaluated in a 24 ha (60 acre) near-level basin system. Gates for pipe turnouts were also tested in a 10 ha (25 acre) border system. The gates provide greater operator convenience, and in the border system, even on a manual basis, increased water storage efficiency and reduced irrigation set time and labor. Systems and devices for controlling the gates are presented in another article.