Details zur Publikation

Kategorie Textpublikation
Referenztyp Zeitschriften
DOI 10.1080/10256016.2020.1788548
Volltext Akzeptiertes Manuskript
Titel (primär) Origin of groundwater in Hanoi, Vietnam, revealed by environmental isotopes
Autor Vu, H.; Merkel, B.J.; Weise, S.M.
Quelle Isotopes in Environmental and Health Studies
Erscheinungsjahr 2020
Department CATHYD
Band/Volume 56
Heft 4
Seite von 370
Seite bis 386
Sprache englisch
Keywords Deuterium excess, groundwater origin, Hanoi, hydrogen-2, hydrogen-3, isotope hydrology, oxygen-18, Red River
Abstract In 2015 and 2016, groundwater samples were collected in Hanoi to analyse the isotopic composition (δ2H, δ18O and 3H) and elucidate the relationship between groundwater and surface water, as well as the origin of the groundwater. The values for δ18O and δ2H indicate that the groundwater originated from evaporated meteoric water and the isotope enrichment is due to the evaporation of shallow groundwater. Evaporation is the primary process affecting stable isotope signatures. Water samples collected from both Holocene and Pleistocene aquifers are more depleted in the heavy isotopes 18O and 2H than the rainfall in the area. This indicates that part of the groundwater is paleo-groundwater or may be caused by the altitude effect due to recharge at a higher elevation. The results also show the close interaction between two granular aquifers and the Red River. Furthermore, the contribution of modern groundwater could be observed by the appearance of tritium in both aquifers. The presence of tritium indicates that originally tritium-free groundwater from the margins of the basin has been diluted by young water. The results of this study might help managers to evaluate the origin and reserves of groundwater more accurately.
dauerhafte UFZ-Verlinkung
Vu, H., Merkel, B.J., Weise, S.M. (2020):
Origin of groundwater in Hanoi, Vietnam, revealed by environmental isotopes
Isot. Environ. Health Stud. 56 (4), 370 - 386 10.1080/10256016.2020.1788548