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Erschienen in: Environmental Earth Sciences 2/2013

01.09.2013 | Special Issue

Characteristics of groundwater in karstic region in northeastern Vietnam

verfasst von: Lam Van Nguyen, Ngoc Kim Nguyen, Hoan Van Hoang, Tuan Quang Tran, Nga Trong Vu

Erschienen in: Environmental Earth Sciences | Ausgabe 2/2013

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Abstract

The groundwater in the karst region of northeastern Vietnam is found in various structural zones such as the Ha Lang, Song Hien, Hon Gai, Song Lo, Song Gam, and Hoang Lien Son Zones, etc. Results from this study show that groundwater in this region is at different depths: ~120 m deep at Quang Ninh, ~100 m at Lang Son, ~80 m at Cao Bang (The most water-abundant depth observed at Cao Bang varies from 40 to 45 m) while it varies from 18–25 to 80 m deep at Quan Ba (Ha Giang), especially at Meo Vac (Ha Giang), where groundwater is observed at 700–800 m deep (equivalent to local base level of the Nho Que River). Overall, groundwater in the region is fresh with total minerals varying from 250 to 400 mg/l; except for the coastal area of Quang Ninh, where groundwater is characterized by much higher total minerals (M = 3–18 g/l) due to the mixing with the saline sea water. The chemistry of water in the region demonstrates that the water is mainly bicarbonate with a [HCO3 ] concentration varying from 150 to 265 mg/l, pH is of 6.5–8.1, and its hardness is of 3.7–6.0 meq/l.

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Metadaten
Titel
Characteristics of groundwater in karstic region in northeastern Vietnam
verfasst von
Lam Van Nguyen
Ngoc Kim Nguyen
Hoan Van Hoang
Tuan Quang Tran
Nga Trong Vu
Publikationsdatum
01.09.2013
Verlag
Springer Berlin Heidelberg
Erschienen in
Environmental Earth Sciences / Ausgabe 2/2013
Print ISSN: 1866-6280
Elektronische ISSN: 1866-6299
DOI
https://doi.org/10.1007/s12665-012-1548-8

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