Parameterizing the effect of vertically-distributed vegetation through an effective roughness (z0,eff) – whereby momentum loss through a three-dimensional foliage volume is represented as momentum loss over an area at one vertical level – can facilitate the use of forest data in flow models, to any level of detail, and simultaneously reduce computational cost. Results of numerical experiments and comparison with observations show that a modelling approach based on z0,eff can estimate wind speed and turbulence levels over forested areas, at heights of interest for wind energy applications (∼ 60 m and higher), but only above flat terrain. Caution must be exercised in the application of such a model to zones of forest edges. Advanced flow models capable of incorporating local (distributed) drag forces are recommended for complex terrain covered by forest.
|Journal||Advances in Science and Research|
|Number of pages||9|
|Publication status||Published - 2020|
|Event||EMS Annual meeting 2019: European Conference for Applied Meteorology and Climatology - Lyngby, Copenhagen, Denmark|
Duration: 9 Sep 2019 → 13 Sep 2019
|Conference||EMS Annual meeting 2019: European Conference for Applied Meteorology and Climatology|
|Period||09/09/2019 → 13/09/2019|