DOI: 10.1016/j.quascirev.2015.06.002
Scopus记录号: 2-s2.0-84945439046
论文题名: Holocene flood frequency reconstruction from speleothems in northern Spain
作者: González-Lemos S. ; Müller W. ; Pisonero J. ; Cheng H. ; Edwards R.L. ; Stoll H.M.
刊名: Quaternary Science Reviews
ISSN: 2773791
出版年: 2015
卷: 127 起始页码: 129
结束页码: 140
语种: 英语
英文关键词: Cave flooding
; Flood events
; Holocene
; Karst
; Stalagmite records
Scopus关键词: Calcite
; Caves
; Deposition
; Petrography
; Precipitation (meteorology)
; Quartz
; Calcite deposition
; Critical rainfall intensities
; Extreme precipitation events
; Flood event
; Holocenes
; Karst
; Persistent feature
; Stalagmite records
; Floods
; drainage network
; flood frequency
; Holocene
; karst
; precipitation assessment
; reconstruction
; speleothem
; stalagmite
; streamflow
; temporal record
; watershed
; Spain
英文摘要: Extreme precipitation events may cause flooding in the subsurface as well as surficial drainage networks, and these flood events may be preserved in the speleothem archive. We describe here a study of stalagmites from the Cueva Rosa, a system with a perennial cave stream in a lower active level and abundant speleothems in a fossil gallery 6-8 m above the active level. Several constrictions in the lower level act as bottlenecks at discharges of 8-11 m3/s during high discharge events, flooding both lower and upper galleries. Because the cave stream is the only efflux for the small surface watershed (1 km2), it is possible to estimate the critical rainfall intensity rates and runoff required to flood the upper gallery. In the upper gallery, historical flooding is constrained by 14C dates of wood fragments which register both a both post-bomb event and event at 420 yr BP. The latter event appears to coincide with deposition of thick mud deposit postdated by speleothem growth since 324 yr BP. A mid-Holocene (8.1-5.3 ka BP) speleothem from the upper gallery contains 26 detrital layers composed of clays and quartz grains evident in sectioned stalagmites and in Al content in LA-ICPMS analyses. The 9 most pronounced layers reach a thickness of 0.1-0.3 mm in the central growth axis. Petrography confirms that calcite crystal growth is continuous through these detrital layers and that they represent decantation events rather than hiatus in calcite deposition. In the mid-Holocene, large events have average recurrence of around 300 years, although large events are absent from the period from 7.3 to 6.3 ka and more frequent in the older and younger portions of the stalagmite. In the last four centuries, two major events have partially buried an actively growing stalagmite, showing that extreme precipitation events capable of flooding the upper gallery remain a persistent feature of the climate. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/59798
Appears in Collections: 过去全球变化的重建
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作者单位: University of Oviedo, Department of Geology, Oviedo, Spain; Royal Holloway University of London, Department of Earth Sciences, Egham, United Kingdom; University of Oviedo, Department of Physics, Oviedo, Spain; Xian Jiaotong University, Institute of Global Environmental Change, Xian, China; University of Minnesota, Department of Earth Sciences, Minneapolis, MN, United States
Recommended Citation:
González-Lemos S.,Müller W.,Pisonero J.,et al. Holocene flood frequency reconstruction from speleothems in northern Spain[J]. Quaternary Science Reviews,2015-01-01,127