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- Publisher Website: 10.1016/j.jaridenv.2018.03.011
- Scopus: eid_2-s2.0-85044861122
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Article: Interactions among hydrological-aeolian processes and vegetation determine grain-size distribution of sediments in a semi-arid coppice dune (nebkha) system
Title | Interactions among hydrological-aeolian processes and vegetation determine grain-size distribution of sediments in a semi-arid coppice dune (nebkha) system |
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Authors | |
Keywords | Aeolian transport Chihuahuan desert Dune dynamics Hydraulic conductivity Land degradation Sediment |
Issue Date | 2018 |
Citation | Journal of Arid Environments, 2018, v. 154, p. 24-33 How to Cite? |
Abstract | The formation of coppice dunes (nebkhas) has been attributed to both aeolian and hydrological processes, however, the interactions between these processes and vegetation dynamics are poorly understood. Additionally, a systematic study on the roles of dune geometry, morphology and hydrological processes in relation to sediment grain-size distribution in the coppice dune system is lacking. Here, we analyzed detailed grain-size distribution and saturated hydraulic conductivity for sediments collected from a series of coppice dunes with different morphological features and phases of development in a degraded shrubland in the southwestern US. Our results show that fine-grained dune sediments are associated with the wind-driven accumulation of very fine sand and fine sand (50–250 μm), irrespective of the height of the dunes. Patterns of grain-size distribution are strongly related to the relative positions along the dune-interdune system and the alignment with the dominant wind direction. Thus, the current notion that dune sediments contain more sand and less silt than interdune soils is over-simplistic. The fact that the grain-size distribution and the saturated hydraulic conductivity are heterogeneous for the dune-interdune system with different morphological features suggests that the relative contributions of aeolian and hydrological processes are distinct in the evolution of coppice dunes. |
Persistent Identifier | http://hdl.handle.net/10722/318706 |
ISSN | 2023 Impact Factor: 2.6 2023 SCImago Journal Rankings: 0.709 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Li, Junran | - |
dc.contributor.author | Ravi, Sujith | - |
dc.date.accessioned | 2022-10-11T12:24:22Z | - |
dc.date.available | 2022-10-11T12:24:22Z | - |
dc.date.issued | 2018 | - |
dc.identifier.citation | Journal of Arid Environments, 2018, v. 154, p. 24-33 | - |
dc.identifier.issn | 0140-1963 | - |
dc.identifier.uri | http://hdl.handle.net/10722/318706 | - |
dc.description.abstract | The formation of coppice dunes (nebkhas) has been attributed to both aeolian and hydrological processes, however, the interactions between these processes and vegetation dynamics are poorly understood. Additionally, a systematic study on the roles of dune geometry, morphology and hydrological processes in relation to sediment grain-size distribution in the coppice dune system is lacking. Here, we analyzed detailed grain-size distribution and saturated hydraulic conductivity for sediments collected from a series of coppice dunes with different morphological features and phases of development in a degraded shrubland in the southwestern US. Our results show that fine-grained dune sediments are associated with the wind-driven accumulation of very fine sand and fine sand (50–250 μm), irrespective of the height of the dunes. Patterns of grain-size distribution are strongly related to the relative positions along the dune-interdune system and the alignment with the dominant wind direction. Thus, the current notion that dune sediments contain more sand and less silt than interdune soils is over-simplistic. The fact that the grain-size distribution and the saturated hydraulic conductivity are heterogeneous for the dune-interdune system with different morphological features suggests that the relative contributions of aeolian and hydrological processes are distinct in the evolution of coppice dunes. | - |
dc.language | eng | - |
dc.relation.ispartof | Journal of Arid Environments | - |
dc.subject | Aeolian transport | - |
dc.subject | Chihuahuan desert | - |
dc.subject | Dune dynamics | - |
dc.subject | Hydraulic conductivity | - |
dc.subject | Land degradation | - |
dc.subject | Sediment | - |
dc.title | Interactions among hydrological-aeolian processes and vegetation determine grain-size distribution of sediments in a semi-arid coppice dune (nebkha) system | - |
dc.type | Article | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1016/j.jaridenv.2018.03.011 | - |
dc.identifier.scopus | eid_2-s2.0-85044861122 | - |
dc.identifier.volume | 154 | - |
dc.identifier.spage | 24 | - |
dc.identifier.epage | 33 | - |
dc.identifier.eissn | 1095-922X | - |
dc.identifier.isi | WOS:000432764800004 | - |