Estimation of the Roughness Length (z o ) in Malaysia using Satellite Image

One of the factors considered in design wind load t o building structure is wind speed profile. Roughne ss Length, zo is one of the parameter needed in order to determine w ind speed profile. In this study, satellite image was used in order to determine the z o. Semi empirical approach that incorporates both qu antitative information (NDVI) from Landsat satellite image and qualitative information (land c over roughness) had been used. The result shows z o parameter determined from satellite image were favorably compared to previous research. Therefore this technique can be use to estimate z o for spatially distribution land cover.