Boundary-Layer Meteorology

, Volume 63, Issue 4, pp 323–363

Representative roughness parameters for homogeneous terrain

  • Jon Wiernga


Objective requirements are drawn up for experimental determination of the roughness of homogeneous terrain, particularly with respect to matching of the observation array to a terrain situation with given fetch, blending height and displacement length. Some fifty well-documented published experiments over various surfaces, ranging from mobile surfaces (sea, or moving sand or snow) to forests and towns, are shown to meet these criteria and are compiled. It is shown that most presently popular terrain reviews underestimate actual terrain roughness lengths by about a factor two.


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Copyright information

© Kluwer Academic Publishers 1993

Authors and Affiliations

  • Jon Wiernga
    • 1
  1. 1.Royal Netherlands Meteorological InstituteDe BiltNetherlands
  2. 2.Dept. of MeteorologyAgricultural UniversityWageningenNetherlands

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