Certified Landscape Irrigation Auditor

What is the definition of 'low flow' in irrigation?

1. A flow rate greater than 30 gallons per hour

2. A flow rate between 15 and 30 gallons per hour

3. A flow rate less than 30 gallons per hour

4. A flow rate of exactly 30 gallons per hour

The correct answer is: A flow rate less than 30 gallons per hour

'Low flow' in irrigation refers to a flow rate less than 30 gallons per hour. This definition is significant because low flow irrigation systems are designed to apply water to plants at a slower rate, which can be beneficial in reducing water waste, improving water absorption, and minimizing runoff. Many modern irrigation practices emphasize low flow techniques to ensure that water delivery is more efficient and targeted, allowing plants to receive the necessary hydration without excess that could lead to issues such as oversaturation or erosion. The focus on a flow rate of less than 30 gallons per hour highlights the importance of conserving water resources, especially in areas where water scarcity is a concern. Understanding what constitutes 'low flow' helps irrigation professionals appropriately design and manage systems to meet both plant needs and environmental considerations. Other options suggest specific ranges or fixed rates that do not align with the broader definition of low flow in irrigation contexts.