Modeling of Sand Dunes Volume (Case Study: Barchan of Haj Ali Gholi Playa, Central Iran)

چکیده مقاله

Barchan dunes are one of the aeolian landforms that originate from reciprocal interaction between wind flow and sand bed. These features have been formed from quicksand, and displacement is the most important of their characteristics. One of the most principle factors for prediction of barchan behaviors is dune volume which can be used to explain its movement in different spatial and temporal scales. Also, this can act as an index to determine the condition of barchan system and indicate its trends. The aim of this paper is to model the barchan dunes volume using morphometric parameters by statistical methods. Results of modeling show significant power relationships between width, length, height and area on one side and dune volume on the other side. There is a maximum significant power relationship between barchan volume and area parameter, with determination index of 0.993 and standard error of estimation of 0.169. Also, complex relationships represent several models with preference value better than simple models. There is maximum significant multiplier relationship between barchan volume, and area and height parameters, with determination index of 0.999. Therefore, we present some models with one independent variable and some models with paired independent variables. The latest models have better preference value than previous ones.