Runoff considerations in sprinkler spacing aim to prevent water from doing what?

• A. Leaving the designated area
• B. Infiltrating too slowly
• C. Evaporating quickly
• D. Leaching beyond root zone

Answer: (A)

Runoff occurs when the rate at which water is applied exceeds the soil’s ability to infiltrate it in the target area, causing water to flow across the surface and leave the designated zone. Sprinkler spacing is chosen to keep the application rate within the soil’s infiltration capacity across the entire plan area, so the water stays inside the designated area rather than washing off onto sidewalks, streets, or other non-target spaces. This is the core aim of spacing in relation to runoff. While other irrigation issues like slow infiltration or rapid evaporation can cause problems, they’re not the primary focus of spacing when it comes to preventing water from leaving the area.