نتایج جستجو برای: barchan
تعداد نتایج: 141 فیلتر نتایج به سال:
Barchans are dunes of crescentic shape found on Earth, Mars and other celestial bodies, growing usually polydisperse granular beds. In this Letter, we investigate experimentally the growth subaqueous barchans consisting bidisperse grains. We that grain distribution within dune changes with employed pair, a transient stripe appears surface. propose observed patterns result from competition betwe...
Barchans are crescent-shaped sand dunes forming in aride regions with unidirectional wind and limited sand supply. We report analytical and numerical results for dune shapes under different environmental conditions as obtained from the so-called ‘minimal model’ of aeolian sand dunes. The profiles of longitudinal vertical slices (i.e. along the wind direction) are analyzed as a function of wind ...
Extended abstract 1- Introduction Granulometric analysis is a common tool used to understand and determine the origin of wind sands, and is applied in desertification studies; to realize such knowledge, the parameters of sand particles size as well as statistical analysis such as mean, standard deviation, kurtosis, skewness, etc. are used. One of the most common types of sand dunes formed...
wind regime and sand grain size are two of the factors that determine the morphology and dynamics of sand dunes in desert areas. regarding the importance of wind effects on sand dunes especially in iran, in this study, khartooran erg was analyzed to determine wind direction and to detect sand source sites. khartooran erg is located on eastern north of iran and lies in khorasan razavi and semnan...
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