CSLB C-27 Landscaping ContractorIrrigation SystemsMedium
A landscape contractor is designing an irrigation system for a new commercial property in California. The local water agency has strict regulations regarding water efficiency and mandates the use of smart irrigation controllers. Which feature of a smart controller is most crucial for meeting these mandates and optimizing water use?
- AA large, backlit display for easy programming.
- BIntegration with a property management system for remote access.
- CWeather-based scheduling (ET-based) that adjusts watering times automatically.
- DAbility to control lights and other landscape features.
Show answer & explanationAnswer & explanation
Correct answer: C. Weather-based scheduling (ET-based) that adjusts watering times automatically.
Weather-based (Evapotranspiration or ET-based) scheduling is the most critical feature for meeting water efficiency mandates. These controllers automatically adjust watering duration and frequency based on real-time local weather data, significantly reducing water waste by only applying water when and where it's needed.
Why the other options are wrong
- A. A large display improves user experience but does not inherently make the system more water-efficient.
- B. Remote access is a management convenience, not a direct water-saving feature in itself, though it can aid in monitoring.
- D. Controlling lights is a convenience feature, not directly related to irrigation water efficiency.
Smart Irrigation Controller (ET-based)
An irrigation controller that automatically adjusts watering schedules based on real-time weather data (e.g., temperature, humidity, rainfall) and evapotranspiration (ET) rates.
- Significantly improves water use efficiency by preventing overwatering.
- Reduces landscape water consumption by 30-50% compared to conventional controllers.
- Often mandated or incentivized by water agencies in drought-prone regions.
Memory trick: Smart controllers listen to the sky, saving water with every dry sigh.