Statistical Modeling of Morphological Parameters of Barchan Dunes (Case Study: Chah Jam Erg in South of Haj Ali GHoli Playa, in Central Part of Semnan Province, IRAN)

Abstract

A wide variety of aeolian sand dunes are found in Chah Jam erg, in central part of IRAN, best known type of them are the barchan dunes, shaped in a crescent, which occur if the wind comes steadily from the same direction throughout the year and if there is not enough sand to cover the entire surface. Barchan dunes in studied area are moving to 20 m/year toward S-SW. Their speed is dependent on wind velocity, three dimensional morphology and interaction between them. In this study, morphological parameters of barchan dunes and their annual movement rate (from 1/4/2008 to 1/4/2009) have been measured. Then using regression analysis method, type and intensity of relationship between morphological parameters and movement rate have been reexamined. These relationships follow simple and multivariable liner, power and exponential relations. Finally, we represented the models, by using them, can easily assess annual movement rate of Barchan dunes.

The GNU Image Manipulation Program Applied to Study the Sand Dunes

“…However, several other morphological parameters can be chosen, as those used in Ref. 18 for instance, a reference where the researchers applied some regression analysis methods to find connections between parameters, such as width and length, and between a specific parameter and the moving rate of dunes.…”

Mathematical and statistical modeling of morphometric and planar parameters of barchans in Pashoeyeh Erg in the west of Lut Desert, Iran

“…Lettau and Lettau (1969) also developed a simple geometric pattern consisting of elliptical and parabolic shapes and straight lines to stimulate a standard barchan dune using the height, width, and length of the barchan and calculated the volume of sand dunes. In general, many researchers have used numerical simulations to predict the movement and evolution of barchans dunes and their morphology (Landsberg, 1956;Howard and Morton, 1978;Anton and Vincent, 1986;Wippermann and Gross, 1986;Anthonsen et al, 1996;Sauermann et al, 2000;Hersen, 2004;Mousavi et al, 2010;Durán et al, 2011;Hamdan et al, 2016;Yang et al, 2019). Also, Hesp and Hastings (1998), by examining the relationships between the morphological parameters of barchans, introduced these relationships as factors controlling the three-dimensional shape of barchans.…”