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DOI | 10.1038/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
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ISSN | 1752-0894 |
EISSN | 1752-0908 |
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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