Textural variations within different representative types of dune sediments in Kuwait |
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| Authors: | A M Al-Dousari A K Al-Enezi J Al-Awadhi |
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| Institution: | (1) Environmental and Urban Division, Coastal and Air Pollution Department, Kuwait Institute for Scientific Research, P.O. Box 24885, Safat, 13109, Kuwait;(2) Department of Earth and Environmental Sciences, Faculty of Science, Kuwait University, Kuwait City, Kuwait |
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| Abstract: | Samples were collected from the surfaces of four types of typical dunes in order to identify variations in textural characteristics
over their bodies. These dunes are barchan, climbing dune, falling dune, and nabkha. Statistical parameters vary from position
to another and show that each dune has its own characteristics. It is well recognized that all the sediments of the studied
dunes tend to be finer from borders toward the mid dune. Histograms and bivariate diagrams successfully differentiate between
different localities within all studied dunes. The climbing dune shows high uniformity where medium sand represents the mean
grain size of 91% of collected samples. Samples from barchan and falling dune show lowest variability in statistical parameter
values compared to other dunes. On the other hand, nabkha sediments are more variable and show higher values of average statistical
parameters. All studied dunes are coarser than surrounding dunes in regional areas and other comparable dunes. But particularly,
the barchan sediments in Kuwait are characterized by larger grain size, better sorting than other comparable dunes in the
upwind (Iraq) and downwind (Saudi Arabia) and other parts of the world. |
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| Keywords: | Aeolian sediments Nabkha Climbing dune Falling dune Barchan Kuwait |
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