Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.geomorph.2014.07.012 |
The geomorphology and evolution of aeolian landforms within a river valley in a semi-humid environment: A case study from Mainling Valley, Qinghai-Tibet Plateau | |
Zhou, Na1,2; Zhang, Chun-Lai1; Wu, Xiao-Xu1,3; Wang, Xun-ming2; Kang, Li-qiang1 | |
通讯作者 | Zhang, Chun-Lai |
来源期刊 | GEOMORPHOLOGY |
ISSN | 0169-555X |
EISSN | 1872-695X |
出版年 | 2014 |
卷号 | 224页码:27-38 |
英文摘要 | This paper systematically analyzes a valley’s aeolian landforms in a semi-humid region and presents a model of its contemporary evolution. Mainling Valley of the Yarlung Zangbo River on the Qinghai-Tibet Plateau was chosen as the case study for the analysis of morphometric characteristics and the evolution sequence of aeolian landforms via field data and remote sensing images. The aeolian landforms were primarily composed of aeolian sand belts on river terraces and dunes (sheets) on hillside slopes. Three types of aeolian sand belts were identified based on their dune types. In type I belts, an erosive air stream combined with relatively high vegetation cover (10%) produced sparsely distributed parabolic dunes with a high variability of dune heights; in type II belts, the continual reworking by the erosive air stream in combination with low vegetation cover (3%) formed more densely distributed barchans and transitional dunes with a moderate variability of dune heights; and in type III belts, the gradual evolution from an erosive sand-laden air stream to a saturated sand-laden air stream in combination with low vegetation cover (2%) produced the densest crescentic dunefields but with the least variability in dune heights. Dune sizes increase, dune shapes become uniform, and dune distribution becomes close from type I to III belts. Lateral linking and merging of the dunes were also observed within the belts. Together this evidence indicates that an evolution sequence may exist. Aeolian dunefields in the belt appear to evolve from embryonic parabolic dunefields to adolescent barchan dunefields and, subsequently, to mature compound crescentic dunefields. As the aeolian sand belt evolves into the mature stage, sand accumulations at the foot of the mountain valley can be steps for sand accumulation on valley-side slopes. (C) 2014 Elsevier B.V. All rights reserved. |
英文关键词 | Aeolian landform Mainling Valley Morphometric characteristics Evolutionary sequence |
类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
收录类别 | SCI-E |
WOS记录号 | WOS:000342274700003 |
WOS关键词 | GRAIN-SIZE CHARACTERISTICS ; SOUTHWESTERN KALAHARI ; LINEAR DUNES ; SAND ; DESERT ; AUSTRALIA ; DYNAMICS ; PATTERN ; ACCUMULATION ; VARIABILITY |
WOS类目 | Geography, Physical ; Geosciences, Multidisciplinary |
WOS研究方向 | Physical Geography ; Geology |
来源机构 | 中国科学院地理科学与资源研究所 ; 北京师范大学 |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/182299 |
作者单位 | 1.Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, MOE Engn Res Ctr Desertificat & Blown Sand Contro, Beijing 100875, Peoples R China; 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China; 3.Beijing Normal Univ, Coll Global Change & Earth Syst Sci, Beijing 100875, Peoples R China |
推荐引用方式 GB/T 7714 | Zhou, Na,Zhang, Chun-Lai,Wu, Xiao-Xu,et al. The geomorphology and evolution of aeolian landforms within a river valley in a semi-humid environment: A case study from Mainling Valley, Qinghai-Tibet Plateau[J]. 中国科学院地理科学与资源研究所, 北京师范大学,2014,224:27-38. |
APA | Zhou, Na,Zhang, Chun-Lai,Wu, Xiao-Xu,Wang, Xun-ming,&Kang, Li-qiang.(2014).The geomorphology and evolution of aeolian landforms within a river valley in a semi-humid environment: A case study from Mainling Valley, Qinghai-Tibet Plateau.GEOMORPHOLOGY,224,27-38. |
MLA | Zhou, Na,et al."The geomorphology and evolution of aeolian landforms within a river valley in a semi-humid environment: A case study from Mainling Valley, Qinghai-Tibet Plateau".GEOMORPHOLOGY 224(2014):27-38. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。