Arid
DOI10.1016/j.geomorph.2009.08.012
Shoreline erosion and aeolian deposition along a recently formed hydro-electric reservoir, Blondulon, Iceland
Vilmundardottir, O. K.1,2; Magnusson, B.1; Gisladottir, G.2,3; Thorsteinsson, Th.3
通讯作者Vilmundardottir, O. K.
来源期刊GEOMORPHOLOGY
ISSN0169-555X
出版年2010
卷号114期号:4页码:542-555
英文摘要

Erosion and deposition processes have been active along the shores of the Blondulon hydro-electric reservoir in the Icelandic highlands since its formation nearly two decades ago. In this study, bluff development and distribution of aeolian material along the shores of the reservoir is related to erosive forces and source materials. The 57 km(2) reservoir was formed in the glacial river Blanda in 1991 and enlarged in 1996. Bluff erosion and aeolian deposition has been monitored since 1997. Field observations, meteorological data, GIS analyses and calculations of wave power were used to measure and describe erosive processes along the new shoreline. Wave induced bluff erosion was most rapid during the first years after impoundment and was most active at sites with glacial till substrate, high cumulative wave power,and long fetches along the dominant wind direction. In recent years, relatively high erosion rates have continued at bluffs of fluvioglacial material under low cumulative wave power. The fluvioglacial material has low resistance to wave activity, creating unstable bluffs, whereas bluffs made of glacial till are more stable. Aeolian sandy sediment, mainly volcanic tephra eroded from soils, has been deposited at sites open towards dry strong winds during low water levels in inlets of low wave energy. Slope and aspect against wind direction restricted the sediment distribution to 212 000 m(2) (21 ha) of the heathland along the reservoir. By 2008 a volume of similar to 11000 m(3) had accumulated. The continued redistribution of aeolian sediments and processes of bluff erosion were controlled by the water level fluctuations in the reservoir. (C) 2009 Elsevier B.V. All rights reserved.


英文关键词Aeolian deposit Bluff erosion rate Shore morphology Wave power Fetch length Hydro-electric reservoir Iceland
类型Article
语种英语
国家Iceland
收录类别SCI-E
WOS记录号WOS:000273929700005
WOS关键词LAKE ; ENVIRONMENTS ; VEGETATION ; LANDSCAPE ; DESERTS ; SANDS
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向Physical Geography ; Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/164327
作者单位1.Icelandic Inst Nat Hist, Reykjavik, Iceland;
2.Univ Iceland, Fac Life & Environm Sci, Dept Geog & Tourism, Reykjavik, Iceland;
3.Univ Iceland, Inst Earth Sci, Reykjavik, Iceland
推荐引用方式
GB/T 7714
Vilmundardottir, O. K.,Magnusson, B.,Gisladottir, G.,et al. Shoreline erosion and aeolian deposition along a recently formed hydro-electric reservoir, Blondulon, Iceland[J],2010,114(4):542-555.
APA Vilmundardottir, O. K.,Magnusson, B.,Gisladottir, G.,&Thorsteinsson, Th..(2010).Shoreline erosion and aeolian deposition along a recently formed hydro-electric reservoir, Blondulon, Iceland.GEOMORPHOLOGY,114(4),542-555.
MLA Vilmundardottir, O. K.,et al."Shoreline erosion and aeolian deposition along a recently formed hydro-electric reservoir, Blondulon, Iceland".GEOMORPHOLOGY 114.4(2010):542-555.
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