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Alan_m_t
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If the wind speed is 5m/s at 10masl. How can i calculate the wind speed at 88masl with a surface roughness coefficient of 0.3?
Cheers
Cheers
The wind speed at a specific height can be calculated using the power law formula: V2 = V1(H2/H1)^α, where V1 is the wind speed at a reference height (typically 10 meters), H1 is the reference height, H2 is the desired height, and α is the coefficient, typically ranging from 0.1-0.3 for open terrain.
The coefficient, α, represents the roughness of the terrain and is used to account for the effects of surface roughness on wind speed. A higher coefficient (closer to 0.3) indicates a rougher surface, which will result in a slower wind speed at a given height.
Yes, in addition to surface roughness, other factors such as topography, atmospheric stability, and land use can also impact wind speed at a specific height. These factors may require adjustments to the coefficient used in the calculation.
The power law formula is a simplified method for estimating wind speed and may not account for all the complexities of wind flow. It is best used as a general approximation and may require adjustments for more accurate predictions.
Wind speed typically increases with height due to reduced surface roughness and decreased drag. However, this increase is not linear and can vary depending on terrain and atmospheric conditions. Using the power law formula can provide a rough estimate of wind speed at a specific height, but it is important to consider other factors as well.