The Effect of a Single Shrub on Wind Speed and Nabkhas Dune Development: A Case Study in Kuwait

Autor:	Jasem M. Al-Awadhi
Rok vydání:	2014
Předmět:	Hydrology ved/biology ved/biology.organism_classification_rank.species Environmental science Sediment Shrub Wind speed Wind tunnel
Zdroj:	International Journal of Geosciences. :20-26
ISSN:	2156-8367 2156-8359
DOI:	10.4236/ijg.2014.51004
Popis:	Thirty coastal nabkhas were selected for morphometrical measurements. The studied nabkhas were mostly elongated, with an average total length of about 12.9 m, an average width of 3.4 m, and an average height of 1.2 m. Optical porosity of nabkha shrub crown was measured and no apparent relationship with the horizontal size of trapped wind laden sand was found. A simple wind tunnel experiment was carried out to investigate the horizontal wind-flow distribution across a pro-typed shrub. The results of the experiment revealed that the degree of wind sheltering might extend up to a downwind distance approximately equal to 4.5 times the height of the shrub, where an effective velocity recovery started.
Databáze:	OpenAIRE
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