Proper Baffle Distance Determination For Designing Volumetric water delivery Modules

The baffle sluice modules are structures designed for delivering rather a constant discharge within a specific rang of upstream water depth variation. They consist of three fixed vertical baffles each has a constant height and constant opening. The height of baffles increases in the downstream direction, but their openings decreased in the same direction. For the modules employed in farm irrigation canals four design methods have been proposed so far. Though the distances between the fixed baffles play an important role in the design process, no agreement among researchers was reported yet. In this research a comprehensive investigation was conducted to determine the proper distance of the baffles. The optimum distance should limit the range of discharge deviation from the design discharge and take into account the construction and installation restriction as well as economic consideration. Also the optimum distance for modules with different discharge is determined and suggested.