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Hydrogeological and hydrochemical features of an area polluted by heavy metals in central Nicaragua

Mendoza, J. A. LU orcid ; Dahlin, Torleif LU and Barmen, Gerhard LU (2006) In Hydrogeology Journal 14(5). p.777-784
Abstract
Geophysical and hydrochemical surveys were used to investigate the hydrogeological conditions in one of the Rio Sucio microbasins, in central Nicaragua. Zones of vertical structures (i.e. fractures and quartz veins) and weathering were mapped using Continuous Vertical Electrical Soundings (CVES), as such zones are of major importance for groundwater transport. Water from the springs was analysed to determine concentrations of major ions and heavy metals. Low ion concentrations and 180 analyses indicate that the springs occur close to their recharge areas and there is a relatively rapid groundwater circulation. Mercury (Hg) content in the springs was low, while comparatively high amounts of lead (Pb) were found. The results presented here... (More)
Geophysical and hydrochemical surveys were used to investigate the hydrogeological conditions in one of the Rio Sucio microbasins, in central Nicaragua. Zones of vertical structures (i.e. fractures and quartz veins) and weathering were mapped using Continuous Vertical Electrical Soundings (CVES), as such zones are of major importance for groundwater transport. Water from the springs was analysed to determine concentrations of major ions and heavy metals. Low ion concentrations and 180 analyses indicate that the springs occur close to their recharge areas and there is a relatively rapid groundwater circulation. Mercury (Hg) content in the springs was low, while comparatively high amounts of lead (Pb) were found. The results presented here demonstrate the important function of weathering and tectonics in the occurrence of groundwater systems in the basin. Hg and Pb found in the springs' water reveal the existence of an increase in pollution sources disseminating in the area. More than 100 years of using mercury in the gold-mining industry and releasing wastes into rivers has affected water quality and ecosystems. Further investigations are needed in this area to determine the groundwater vulnerability to this pollution as this resource may be needed in the future. (Less)
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author
; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Nicaragua, contamination, stable isotopes, hydrochemistry, geophysical methods
in
Hydrogeology Journal
volume
14
issue
5
pages
777 - 784
publisher
Springer
external identifiers
  • wos:000239459300014
  • scopus:33747149194
ISSN
1431-2174
DOI
10.1007/s10040-005-0462-5
language
English
LU publication?
yes
id
0515745a-5ab2-4b7d-955d-1452c694ec21 (old id 399147)
date added to LUP
2016-04-01 12:32:11
date last changed
2020-04-07 02:12:48
@article{0515745a-5ab2-4b7d-955d-1452c694ec21,
  abstract     = {Geophysical and hydrochemical surveys were used to investigate the hydrogeological conditions in one of the Rio Sucio microbasins, in central Nicaragua. Zones of vertical structures (i.e. fractures and quartz veins) and weathering were mapped using Continuous Vertical Electrical Soundings (CVES), as such zones are of major importance for groundwater transport. Water from the springs was analysed to determine concentrations of major ions and heavy metals. Low ion concentrations and 180 analyses indicate that the springs occur close to their recharge areas and there is a relatively rapid groundwater circulation. Mercury (Hg) content in the springs was low, while comparatively high amounts of lead (Pb) were found. The results presented here demonstrate the important function of weathering and tectonics in the occurrence of groundwater systems in the basin. Hg and Pb found in the springs' water reveal the existence of an increase in pollution sources disseminating in the area. More than 100 years of using mercury in the gold-mining industry and releasing wastes into rivers has affected water quality and ecosystems. Further investigations are needed in this area to determine the groundwater vulnerability to this pollution as this resource may be needed in the future.},
  author       = {Mendoza, J. A. and Dahlin, Torleif and Barmen, Gerhard},
  issn         = {1431-2174},
  language     = {eng},
  number       = {5},
  pages        = {777--784},
  publisher    = {Springer},
  series       = {Hydrogeology Journal},
  title        = {Hydrogeological and hydrochemical features of an area polluted by heavy metals in central Nicaragua},
  url          = {https://lup.lub.lu.se/search/ws/files/2962856/4934452.pdf},
  doi          = {10.1007/s10040-005-0462-5},
  volume       = {14},
  year         = {2006},
}