What is a typical symptom indicating uniform head misdirection or poor distribution in a zone?

What is a typical symptom indicating uniform head misdirection or poor distribution in a zone?

• A. Wet spots in the zone center with dry edges (or uneven coverage due to misaligned nozzles or blocked emitters).
• B. Even wetting across the zone.
• C. All areas dry.
• D. Wet edges with dry center.

Answer: (A)

Understanding coverage uniformity is about how evenly water is applied across the zone. When sprinkler heads are misdirected or blocked, the water tends to concentrate where the sprays overlap most—often toward the zone center—while the outer edges don’t receive as much water. That creates wet spots in the center with drier edges, which is the clearest sign of uniform head misdirection or poor distribution. It’s exactly the pattern you’d expect when nozzles are misaligned or emitters are blocked. Signs that don’t fit this issue include even wetting across the zone, which indicates good distribution; all areas being dry, which means no watering at all; and wet edges with a dry center, which would point to the opposite distribution problem (water concentrating toward the edges) rather than uniform center-focused misdirection.

Understanding coverage uniformity is about how evenly water is applied across the zone. When sprinkler heads are misdirected or blocked, the water tends to concentrate where the sprays overlap most—often toward the zone center—while the outer edges don’t receive as much water. That creates wet spots in the center with drier edges, which is the clearest sign of uniform head misdirection or poor distribution. It’s exactly the pattern you’d expect when nozzles are misaligned or emitters are blocked.

Signs that don’t fit this issue include even wetting across the zone, which indicates good distribution; all areas being dry, which means no watering at all; and wet edges with a dry center, which would point to the opposite distribution problem (water concentrating toward the edges) rather than uniform center-focused misdirection.