title: Features of Groundwater Formation of the Main Aquifers of St. Petersburg and Suburbs Based on Data of Chemical and Isotope Composition
metadata.name: dc.contributor.author
metadata.value: Vinograd, Natalia A.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Tokarev, Igor V.
metadata.lang: -
metadata.name: dc.contributor.author
metadata.value: Stroganova, Tatyana A.
metadata.lang: -
metadata.name: dc.date.accessioned
metadata.value: 2020-02-05T12:00:37Z
metadata.lang: -
metadata.name: dc.date.available
metadata.value: 2020-02-05T12:00:37Z
metadata.lang: -
metadata.name: dc.date.issued
metadata.value: 2019-12
metadata.lang: -
metadata.name: dc.identifier.citation
metadata.value: Vinograd, N. A., Tokarev, I. V., Stroganova, T. A. (2019). Features of Groundwater Formation of the Main Aquifers of St. Petersburg and Suburbs Based on Data of Chemical and Isotope Composition. Vestnik of Saint Petersburg University. Earth Sciences, 64 (4), 575–597.
metadata.lang: en_GB
metadata.name: dc.identifier.other
metadata.value: https://doi.org/10.21638/spbu07.2019.405
metadata.lang: -
metadata.name: dc.identifier.uri
metadata.value: http://hdl.handle.net/11701/16987
metadata.lang: -
metadata.name: dc.description.abstract
metadata.value: The main aquifers used for water supply in St. Petersburg and Leningrad Oblast contain waters
  with total dissolved solids (TDS) and chemical composition that vary considerably with the
  distance from modern recharge areas, as well as depending on the composition of the host
  rocks. Waters of the Quaternary, Devonian, Ordovician, Cambrian-Ordovician and Vendian
  aquifers were sampled and analyzed. With low mineralization, a bicarbonate calcium-magnesium
  composition predominates in waters of low TDS, while with its increase over 400–
  600 mg/dm3, chlorides dominate in the anion composition, and sodium — in cation composition.
  In some cases, low-mineralized water contains significant amounts of iron and can be
  considered mineral-medicinal. A regional feature is the local excess (sometimes significant)
  of the activity of natural radionuclides over the intervention levels. To identify formation conditions,
  data on the isotopic composition (deuterium and oxygen content-18) of groundwater
  were used. The greatest variety of isotopic compositions is observed in the waters of the Vendian
  aquifer. On the Karelian Isthmus, it contains modern water (which is also indicated by tritium).
  When moving to the south, in the direction of increasing TDS, the isotopic composition
  of water in the Vendian aquifer gets lighter, up to the appearance of waters with obvious signs
  of cryogenic metamorphosis. Light isotopic compositions are explained by the formation of
  groundwater in the cold climatic period, which ended in this area at least 12,000 years ago.
  Changes in the isotopic composition and chemistry of the waters of the Vendian aquifer are
  simultaneous with an increase in their age at a distance from the recharge area. Hence, in natural
  conditions, there is no areal recharge of the aquifer outside the area of its discharge to the land surface or under the permeable Quaternary deposits. In terms of water management, this
  means that its resources in the area where TDS exceeds 0.7–1.0 g/ dm3 should be calculated
  only as lateral inflow.
metadata.lang: en_GB
metadata.name: dc.language.iso
metadata.value: ru
metadata.lang: en_GB
metadata.name: dc.publisher
metadata.value: St Petersburg State University
metadata.lang: en_GB
metadata.name: dc.relation.ispartofseries
metadata.value: Vestnik of St Petersburg University. Earth Sciences;Volume 64; Issue 4
metadata.lang: -
metadata.name: dc.subject
metadata.value: Aquifer
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: groundwater formation
metadata.lang: en_GB
metadata.name: dc.subject
metadata.value: chemical and isotope composition
metadata.lang: en_GB
metadata.name: dc.title
metadata.value: Features of Groundwater Formation of the Main Aquifers of St. Petersburg and Suburbs Based on Data of Chemical and Isotope Composition
metadata.lang: en_GB
metadata.name: dc.type
metadata.value: Article
metadata.lang: en_GB
resources.filename: 575-597.pdf
resources.url: https://dspace.spbu.ru/bitstream/11701/16987/3/575-597.pdf
resources.format: Adobe PDF
resources.size: 1,43 MB