Grain-size characteristics of surface sediments of nebkhas at the southern margin of the Mu Us dune field, China

Jinchang Li, Qi Yao, Yuan Wang, Rentao Liu, Hong Zhang

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11 Scopus citations

Abstract

The grain-size characteristics of nebkhas are considered to differ from those of mobile dunes in relation to differences in vegetation influences. However, minimal research has been conducted in this respect. Therefore, this study investigates the grain-size characteristics of surface sediments of a nebkha field with 50%–80% vegetation cover at the southern margin of the Mu Us dune field. The grain-size composition and parameters were determined at different positions on nebkhas and in interdune areas. The results indicate that the nebkha sediments were significantly finer than those of mobile dunes, had weaker sorting, and were more positively skewed and more leptokurtic in relation to the interception of fine particles by vegetation, associated prevention of movement, and pedogenesis. We infer that the influence of pedogenesis resulted in minimal differences between grain-size compositions and parameters in samples obtained from different positions on nebkhas, between nebkhas, and in interdune areas. The creep populations of interdune sediments can be transported to the windward toe, but further transportation along the windward slope of a nebkha to the crest or leeward slope is limited because of vegetation interception.

Original languageEnglish
Article number104210
JournalCatena
Volume183
DOIs
StatePublished - Dec 2019
Externally publishedYes

Bibliographical note

Publisher Copyright:
© 2019 Elsevier B.V.

Funding

We thank the anonymous reviewers for their valuable comments and suggestions. This work was supported by the Higher Education Institution Project of Shanxi Province : Ecological Remediation of Soil Pollution Disciplines Group ( 20181401 ), the Fund for the Shanxi “1331 Project” Key Innovative Research Team ( 201806 ), the Natural Science Foundation of Shanxi Province ( 201801D121259 ), and the Natural Science Foundation of Ningxia Province ( 2018AAC02004 ). We thank Sara J. Mason, M.Sc., from Liwen Bianji, Edanz Editing China ( www.liwenbianji.cn/ac ), for editing the English text of a draft of this manuscript. We thank the anonymous reviewers for their valuable comments and suggestions. This work was supported by the Higher Education Institution Project of Shanxi Province: Ecological Remediation of Soil Pollution Disciplines Group (20181401), the Fund for the Shanxi ?1331 Project? Key Innovative Research Team (201806), the Natural Science Foundation of Shanxi Province (201801D121259), and the Natural Science Foundation of Ningxia Province (2018AAC02004). We thank Sara J. Mason, M.Sc. from Liwen Bianji, Edanz Editing China (www.liwenbianji.cn/ac), for editing the English text of a draft of this manuscript.

FundersFunder number
Fund for the Shanxi ?
Fund for the Shanxi “1331 Project” Key Innovative Research Team201806
Higher Education Institution Project of Shanxi Province : Ecological Remediation of Soil Pollution Disciplines Group20181401
Higher Education Institution Project of Shanxi Province: Ecological Remediation of Soil Pollution Disciplines Group
Key Innovative Research Team
Natural Science Foundation of Shanxi Province201801D121259
Natural Science Foundation of Ningxia Province2018AAC02004

    Keywords

    • Grain size
    • Interdune
    • Nebkha
    • Sediments transport
    • Vegetation

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