What is the use of an anemometer in the context of an irrigation audit?

• A. To measure soil moisture
• B. To measure wind speed
• C. To measure water pressure
• D. To measure plant height

Answer: (B)

In the context of an irrigation audit, an anemometer is used to measure wind speed. This measurement is crucial because wind can significantly affect the efficiency of irrigation systems, especially when using sprinklers. High wind speeds can lead to water being blown off target, causing uneven distribution of water across the landscape, which can result in both overwatering and underwatering of certain areas. By understanding wind conditions, a landscaper can adjust irrigation schedules or methods to ensure that water is applied effectively and efficiently, thereby improving water use efficiency and promoting healthy plant growth.

The other options pertain to different tools or instruments suited for various measurements. Soil moisture would require a moisture meter, water pressure is measured by a pressure gauge, and plant height is determined through scaling or visual inspection, none of which are functions of an anemometer.