منابع مشابه
Sand Movement patterns in the south of Iran
Wind regime data from the Jask meteorological station from a 20-year statistical period (1985-2005) was analyzedusing the Fryberger method to investigate sand drift potential (DP) in this area. The resultant drift potential anddirectional variability of wind were calculated and illustrated. Average annual sand DP was estimated to be 460vector units (VU), and the sand flux is 51 m3/m.year. There...
متن کاملSynoptic radio observations as proxies for upper atmosphere modelling
The specification of the upper atmosphere strongly relies on solar proxies that can properly reproduce the solar energetic input in the UV. Whilst the microwave flux at 10.7 cm (also called F10.7 index) has been routinely used as a solar proxy, we show that the radio flux at other wavelengths provides valuable complementary information that enhances their value for upper atmospheric modelling. ...
متن کاملThe Influence of Hydrogeology Characteristics on Sand dune movement (Case study: Daranjir playa)
Introduction About 1/4th of the world deserts is covered with Aeolian sand (McKee, 1979; Ghadiry et al., 2012). Sand dunes are considered as one of the most important geomorphic features of such environments the formation of which shows the abundant resources of sand, the sand-moving powerful wind and the suitable conditions for sediment deposit (Tsoar, 2001; Michel et al, 2018). The most sign...
متن کاملNumerical simulation of wind sand movement in straw checkerboard barriers.
Straw checkerboard barrier (SCB) is the most representative antidesertification measure and plays a significant role in antidesertification projects. Large-eddy simulation and discrete-particle tracing were used to numerically simulate the wind sand movement inside the straw checkerboard barrier (SCB), study the movement characteristics of sand particles, find the transverse velocities of sand ...
متن کاملAnalysis of Wind-blown Sand Movement over Transverse Dunes
Wind-blown sand movement often occurs in a very complicated desert environment where sand dunes and ripples are the basic forms. However, most current studies on the theoretic and numerical models of wind-blown sand movement only consider ideal conditions such as steady wind velocity, flat sand surface, etc. In fact, the windward slope gradient plays a great role in the lift-off and sand partic...
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ژورنال
عنوان ژورنال: Coastal Engineering Proceedings
سال: 1970
ISSN: 2156-1028,0589-087X
DOI: 10.9753/icce.v12.49