气候变化领域集成服务门户(CCPortal): Drainage and erosion of Cambodia's great lake in the middle-late Holocene: The combined role of climatic drying; base-level fall and river capture

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DOI	10.1016/j.quascirev.2020.106265
	Drainage and erosion of Cambodia's great lake in the middle-late Holocene: The combined role of climatic drying; base-level fall and river capture
	Darby S.E.; Langdon P.G.; Best J.L.; Leyland J.; Hackney C.R.; Marti M.; Morgan P.R.; Ben S.; Aalto R.; Parsons D.R.; Nicholas A.P.; Leng M.J.
发表日期	2020
ISSN	0277-3791
卷号	236
英文摘要	We provide evidence for a large-scale geomorphic event in Cambodia's great lake, the Tonlé Sap, during the middle Holocene. The present-day hydrology of the basin is dominated by an annual flood pulse where water from the Mekong River raises the lake level by c. 8 m during the monsoon season. We present new subsurface geophysical data, allied to new and past core studies, which unequivocally show a period of major mid-Holocene erosion across the entire Tonlé Sap basin that is coincident with establishment of the lake's flood pulse. We argue that this widespread erosion, which removed at least 1.2 m of sediment across the lake's extent, was triggered by up to three, likely interacting, processes: (1) base-level lowering due to mid-Holocene sea-level fall, leading to (2) capture of the Tonlé Sap drainage by the Mekong River, and (3) a drying climate that also reduced lake level. Longer-term landscape evolution was thus punctuated by a rapid, river capture- and base-level fall- induced, lake drainage that established the ecosystem that flourishes today. The scale of change induced by this mid-Holocene river capture event demonstrates the susceptibility of the Tonlé Sap lake to ongoing changes in local base-level and hydrology induced by anthropogenic activity, such as damming and sand mining, within the Mekong River Basin. © 2020 Elsevier Ltd
英文关键词	Holocene; Paleogeography; Paleolimnology; Southeastern Asia; Tonlé sap
语种	英语
scopus关键词	Erosion; Floods; Paleolimnology; Rivers; Sea level; Anthropogenic activity; Geophysical data; Holocene sea level; Holocenes; Landscape evolutions; Mekong river basins; Paleogeography; Southeastern Asia; Lakes; drainage basin; flood; Holocene; hydrology; lake level; landscape; landscape evolution; Paleogene; paleolimnology; sediment-water interface; Cambodia; Mekong Basin
来源期刊	Quaternary Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/151501
作者单位	School of Geography and Environmental Science, University of Southampton, Highfield, Southampton, SO17 1BJ, United Kingdom; Department of Geology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, United States; Departments of Geography and GIS, Mechanical Science and Engineering and Ven Te Chow Hydrosystems Laboratory, University of Illinois at Urbana-Champaign, Urbana, IL 61801, United States; School of Geography, Politics and Sociology, University of Newcastle, Newcastle-Upon-Tyne, NE1 7RD, United Kingdom; Ministry of Mines and Energy, 79-89 Pasteur Street, Sangkat Phsar Thmey, Khan Daun Penh, Phnom Penh, Cambodia; Department of Geography, University of Exeter, Exeter, EX4 4RJ, United Kingdom; Energy and Environment Institute, University of Hull, Hull, HU6 7RX, United Kingdom; British Geological Survey, Keyworth, Nottingham, NG12 5GG, United Kingdom; Centre for Environmental Geochemistry, School of Biosciences, University of NottinghamLE12 5RD, United Kingdom
推荐引用方式 GB/T 7714	Darby S.E.,Langdon P.G.,Best J.L.,et al. Drainage and erosion of Cambodia's great lake in the middle-late Holocene: The combined role of climatic drying; base-level fall and river capture[J],2020,236.
APA	Darby S.E..,Langdon P.G..,Best J.L..,Leyland J..,Hackney C.R..,...&Leng M.J..(2020).Drainage and erosion of Cambodia's great lake in the middle-late Holocene: The combined role of climatic drying; base-level fall and river capture.Quaternary Science Reviews,236.
MLA	Darby S.E.,et al."Drainage and erosion of Cambodia's great lake in the middle-late Holocene: The combined role of climatic drying; base-level fall and river capture".Quaternary Science Reviews 236(2020).