Water measurement methods and devices such as remote control devices in canal structures, vane deflection, magnetic flowmeters, constant-head orifice turnouts, Venturi flumes, Yakima weir boxes, multiple-notch weirs, dilution techniques, and measurements using radioisotopes. Includes tables, diagrams, charts, formulas, illustrations, and descriptions useful for designers, system operators, and water users concerned with measuring irrigation and municipal and industrial waters.