THE HYDRAULICS OF AN AUTOMATED FURROW IRRIGATION SYSTEM WITH RECTANGULAR SIDE WEIR OUTLETS

摘要

Decreasing spatially varied steady flow experiments were conducted in a horizontal concrete irrigation channel with rec¬tangular side weir outlets. Discharge relationships for multiple side weirs were determined. Two roughness coefficients were calculated for spatially varied flow. A direct solution to the water surface profiles in one and two distribution bays was de¬rived and was verified. The variations in side weir discharge along an irrigation bay were evaluated.