A canvas irrigation dam tarp controls water distribution by acting as a flexible hydraulic barrier that intercepts open-channel flow. By leveraging localized tarp hydrostatic pressure, the structure raises the upstream head height to force lateral furrow water diversion into cultivated rows, while wet fiber swelling establishes strict silt infiltration control along the ditch bed.Hydrodynamic Principles of Tarp-Driven Furrow Water DiversionCanvas dams control furrow water diversion by translatin