Certified Landscape Irrigation Auditor

What factor can impact sprinkler spacing and lower distribution uniformity?

1. Water pressure

2. Irregular area shape

3. Type of sprinklers used

4. Time of day for watering

The correct answer is: Irregular area shape

The factor that impacts sprinkler spacing and lowers distribution uniformity significantly is the irregular area shape. When an irrigation area has an unconventional or complicated shape, it presents challenges for the even distribution of water. Sprinklers are typically designed to achieve uniform coverage within a specified distance based on their specific patterns and operating characteristics. In a regular, geometrical area, placing sprinklers at uniform intervals can ensure adequate overlap and coverage, facilitating even distribution of water. However, in areas with curves, corners, or obstructions, achieving this uniform spacing becomes difficult. This can lead to dry spots and areas receiving excess water, thereby reducing overall efficiency and increasing the likelihood of runoff and water waste. Water pressure is crucial for how well sprinklers function, and different types of sprinklers can affect distribution; however, these factors, while influential in the performance of the system, do not inherently create the same degree of challenges in spacing as an irregular area shape does. Time of day for watering is more related to evaporation rates and plant uptake than to the actual mechanics of spacing and distribution uniformity.