AN ANALYTICAL METHOD FOR THE DETERMINATION OF THE ROUGHNESS PARAMETERS OVER COMPLEX REGIONS

The values of roughness length for momentum to and zero-plane displace ment do over a hilly rough complex region with vegetation were evaluat ed without any assumption concerning to and do. It was found that for widely scattered profile data, the method of least squares will not gi ve a reasonable result in determining the roughness parameters. For th is purpose, the method of maximum correlation was introduced instead. This method gave a fair result for captive balloon observations conduc ted in hilly terrain mainly covered with forest in the northwestern pa rt of the Kanto Plain, Japan.