Which statement best describes wind rose data?

Which statement best describes wind rose data?

• A. It shows the relative frequency and direction of wind loading
• B. It shows soil moisture levels
• C. It maps traffic patterns in an urban area
• D. It indicates air quality indexes over time

Answer: (A)

The main idea is to understand what wind rose data communicates. The best description is that it shows the relative frequency and direction of wind loading. A wind rose is a circular chart that displays how often winds come from each compass direction and, often, the wind speeds associated with those directions. This helps identify the predominant wind directions and typical wind speeds, which determine the wind pressures a structure must resist. That information is crucial for site planning and design, since exposure to winds from certain directions can produce higher loads on façades or roofs. The other options don’t capture this specific information: soil moisture, traffic patterns, or air quality indexes are not about the direction and frequency of wind.

The main idea is to understand what wind rose data communicates. The best description is that it shows the relative frequency and direction of wind loading. A wind rose is a circular chart that displays how often winds come from each compass direction and, often, the wind speeds associated with those directions. This helps identify the predominant wind directions and typical wind speeds, which determine the wind pressures a structure must resist. That information is crucial for site planning and design, since exposure to winds from certain directions can produce higher loads on façades or roofs. The other options don’t capture this specific information: soil moisture, traffic patterns, or air quality indexes are not about the direction and frequency of wind.