Arid
DOI10.1016/S0140-1963(05)80017-5
THE MORPHOLOGY AND ORIGIN OF NABKHAS, REGION OF MOPTI, MALI, WEST-AFRICA
NICKLING, WG; WOLFE, SA
通讯作者NICKLING, WG
ISSN0140-1963
出版年1994
卷号28期号:1页码:13-30
英文摘要

Nabkhas near Mopti in Mali, West Africa have formed as a result of continued cultivation coupled with grazing during periods of severe drought. Dune development at three investigated sites was initiated after the onset of drought conditions. The dunes have formed on deltaic soils which were previously cultivated. Although most of the dunes are at least partially vegetated, the interdune surfaces are generally devoid of vegetation, highly compacted and continually disturbed by animals. The dunes are elongate and average 0.57 m high, 3.45 m wide and 5.45 m long. They are strongly aligned ESE-WNW with stoss (windward) sides oriented towards the ESE. Dune sediments are sandier and better sorted than the parent deltaic soils but contain a high proportion of silt and clay thought to be transported onto the dunes as sand-sized aggregates.


The nabkhas have developed as a consequence of climatic and anthropogenic stresses on the arid ecosystem and are linked to desertification within the region. Ongoing disturbance from grazing and cultivation will cause further vegetation reduction and surface destabilization and may result in more widespread dune development.


英文关键词DESERTIFICATION AEOLIAN DUNES WIND EROSION
类型Article
语种英语
收录类别SCI-E
WOS记录号WOS:A1994PF21100002
WOS关键词SOUTHERN NEW-MEXICO ; MESQUITE DUNELANDS ; FORMER GRASSLANDS ; SHADOW DUNES ; DROUGHT ; SAHEL ; RAINFALL
WOS类目Ecology ; Environmental Sciences
WOS研究方向Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/130240
推荐引用方式
GB/T 7714
NICKLING, WG,WOLFE, SA. THE MORPHOLOGY AND ORIGIN OF NABKHAS, REGION OF MOPTI, MALI, WEST-AFRICA[J],1994,28(1):13-30.
APA NICKLING, WG,&WOLFE, SA.(1994).THE MORPHOLOGY AND ORIGIN OF NABKHAS, REGION OF MOPTI, MALI, WEST-AFRICA.,28(1),13-30.
MLA NICKLING, WG,et al."THE MORPHOLOGY AND ORIGIN OF NABKHAS, REGION OF MOPTI, MALI, WEST-AFRICA".28.1(1994):13-30.
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