GSTDTAP  > 地球科学
DOI10.1038/NGEO2938
Groundwater salinity influenced by Holocene seawater trapped in incised valleys in the Red River delta plain
Larsen, Flemming1; Long Vu Tran2; Hoan Van Hoang2; Luu Thi Tran3; Christiansen, Anders Vest4; Nhan Quy Pham5
2017-05-01
发表期刊NATURE GEOSCIENCE
ISSN1752-0894
EISSN1752-0908
出版年2017
卷号10期号:5
文章类型Article
语种英语
国家Denmark; Vietnam
英文摘要

Salty and brackish groundwater has been observed at least 100 km inland in some aquifers contained within Quaternary delta plains. This phenomenon limits access to fresh groundwater resources, particularly in the densely populated deltas of Southeast Asia. However, the causes of inland salinity are unclear. Here we present borehole and geophysical data that show that in the Red River delta plain of Vietnam, salty and brackish groundwater primarily occurs in incised valleys that were formed during sea-level lowstands during the Pleistocene. During the mid-Holocene, these valleys were filled with fine-grained marine deposits containing trapped seawater. We conduct groundwater flow simulations that show that the age, thickness, and permeability of the marine sediments are the primary controls on the leaching of salty porewater into the freshwater aquifer. We find that salty groundwater originating from this trapped seawater is still present in Holocene-aged sediments with low permeability, and affects groundwater salinity in adjacent aquifers. In contrast, trapped seawater from all Pleistocene-aged sediments has been leached. We identify a number of brackish to saline delta aquifers elsewhere in Asia and throughout the world that have a similar sedimentary history, and thus are likely to be influenced by this leaching process.


领域地球科学 ; 气候变化
收录类别SCI-E
WOS记录号WOS:000400407000016
WOS关键词SEA-LEVEL RISE ; SALTWATER INTRUSION ; FRESH GROUNDWATER ; WATER-INTRUSION ; SALT INTRUSION ; SALINIZATION ; TEMPERATURE ; PALEOWATERS ; NETHERLANDS ; DIFFUSION
WOS类目Geosciences, Multidisciplinary
WOS研究方向Geology
引用统计
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/34850
专题地球科学
气候变化
作者单位1.Geol Survey Denmark & Greenland, Oster Voldgade 10, DK-1350 Copenhagen, Denmark;
2.Hanoi Univ Min & Geol, Dept Hydrogeol, Hanoi, Vietnam;
3.Hanoi Univ Sci, Dept Geol, Hanoi, Vietnam;
4.Aarhus Univ, Dept Geosci, Hoegh Guldbergs Gade 2, DK-8000 Aarhus, Denmark;
5.Hanoi Univ Nat Resources & Environm, Hanoi, Vietnam
推荐引用方式
GB/T 7714
Larsen, Flemming,Long Vu Tran,Hoan Van Hoang,et al. Groundwater salinity influenced by Holocene seawater trapped in incised valleys in the Red River delta plain[J]. NATURE GEOSCIENCE,2017,10(5).
APA Larsen, Flemming,Long Vu Tran,Hoan Van Hoang,Luu Thi Tran,Christiansen, Anders Vest,&Nhan Quy Pham.(2017).Groundwater salinity influenced by Holocene seawater trapped in incised valleys in the Red River delta plain.NATURE GEOSCIENCE,10(5).
MLA Larsen, Flemming,et al."Groundwater salinity influenced by Holocene seawater trapped in incised valleys in the Red River delta plain".NATURE GEOSCIENCE 10.5(2017).
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