DU stands for which term in irrigation management?

• A. Drainage Utility
• B. Distribution Uniformity
• C. Depth Uniformity
• D. Dynamic Usage

Answer: (B)

Distribution Uniformity is about how evenly water is spread across the irrigated area. In irrigation management, this metric matters because uniform water application leads to consistent crop growth and water efficiency. It is typically defined by comparing the amount of water received by the driest portion of the area (often the lowest 25%) to the overall average across the field. A higher value means more even distribution; a lower value signals spots that are too dry and others that may receive excess water. The other terms don’t describe this standard measure of how evenly water is applied across the zone.