Sand source and formation mechanism of riverine sand dunes: a case study in Xiangshui River, China

<p>The extensivity of sand dunes in continental interiors makes the understating of their morphodynamical properties valuable for palaeoenvironmental reconstructions and the interpretation of landscape evolution. Nevertheless, the study of aeolian landscape development at the million-years timescale is hampered by the complex interaction of factors determining dune migration and the inherently self-destructive nature of their chronostratigraphy, thus limiting the applicability of traditional luminescence-based dating methods for configuring processes beyond ~300 Ka. In this study, we present a standalone program that simulates aeolian transport based on luminescence-derived chronologies coupled with numerical modelling of cosmogenic nuclides accumulation. This integrative approach reveals ancient phases of sand irruption and provides a data-based scheme facilitating the morphodynamical study of aeolian processes over multiple timescales. We present a case study of the program application by analyzing data from the Australian Simpson Desert, unfolding several phases of aeolian vitality since the late Pliocene. The synchronicity of the results with drastic changes in environmental settings exemplifies the applicability of process-based modelling in constructing a timeframe of key landscape evolution events in arid environments by studying aeolian landforms. Finally, the relationships between model parameters used to determine environmental settings on sand migration patterns make the program a powerful tool to further investigating triggers and mechanisms of aeolian processes.</p>

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Is penetration of non-psammophytes an underestimated threat to sand dunes? - a case study from western Pontic coast

Journal of Coastal Conservation ◽

10.1007/s11852-018-0656-3 ◽

2018 ◽

Vol 23 (2) ◽

pp. 271-281 ◽

Cited By ~ 2

Author(s):

Magdalena Valcheva ◽

Desislava Sopotlieva ◽

Tenyo Meshinev ◽

Iva Apostolova

Keyword(s):

Sand Dunes

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Changes in the Environment and Migration in Southern Morocco – Example of the Mhamid Oasis

Miscellanea Geographica ◽

10.2478/mgrsd-2008-0024 ◽

2008 ◽

Vol 13 (1) ◽

pp. 239-250 ◽

Cited By ~ 1

Author(s):

Karolina Sobczak

Keyword(s):

Sand Dunes ◽

Living Conditions ◽

Desertification Process ◽

The Subject ◽

And Migration

Abstract The subject of the article is an analysis of changes in the environment and economy of oases in southern Morocco, on the basis of a case study of Mhamid. The conclusions are that water investments carried out in the Draa Valley intensified the desertification process. This is exemplified by a stronger aeolian deflation, worsening living conditions of the population, limiting of arable areas and finally, migration. Paradoxically, because of desertification, the region has a chance to develop economically because the newly created sand dunes fields stimulate development of tourism.

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