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Aquifer interactions with a polluted mountain river of Nicaragua

Mendoza, Alfredo LU ; Ulriksen, Peter LU ; Picado, Francisco LU and Dahlin, Torleif LU (2008) In Hydrological Processes 22(13). p.2264-2273
Abstract
The interactions between a stream and nearby shallow aquifers were investigated in a mountain basin being polluted by mercury released during mining in central Nicaragua. Hourly data series of water levels and temperatures were analysed using cross-correlation. Resistivity imaging was used to map the subsurface and to complement the hydrological data interpretation. The results show the complex hydrogeological conditions that characterize the region, with weathering and fractured rock as main contributors to groundwater transport. The resistivity images suggest the presence of two vertical dykes perpendicular to the stream, and zones rich in clay. The data series indicate a rapid response from the aquifers to recharge events, followed by... (More)
The interactions between a stream and nearby shallow aquifers were investigated in a mountain basin being polluted by mercury released during mining in central Nicaragua. Hourly data series of water levels and temperatures were analysed using cross-correlation. Resistivity imaging was used to map the subsurface and to complement the hydrological data interpretation. The results show the complex hydrogeological conditions that characterize the region, with weathering and fractured rock as main contributors to groundwater transport. The resistivity images suggest the presence of two vertical dykes perpendicular to the stream, and zones rich in clay. The data series indicate a rapid response from the aquifers to recharge events, followed by immediate discharge on a yearly basis. Furthermore, alternating periods of stream infiltration and aquifer discharge were identified. This work demonstrates that surface water pollution is a threat to groundwater quality in the area. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
groundwater, pollution, Nicaragua, water, surface, cross-correlation, time series analysis, resistivity imaging
in
Hydrological Processes
volume
22
issue
13
pages
2264 - 2273
publisher
John Wiley & Sons
external identifiers
  • wos:000257090200017
  • scopus:46449086661
ISSN
1099-1085
DOI
10.1002/hyp.6822
language
English
LU publication?
yes
id
388416f7-f1c4-4cc6-9440-b73774346657 (old id 1186928)
date added to LUP
2008-09-04 09:55:53
date last changed
2017-01-01 05:00:28
@article{388416f7-f1c4-4cc6-9440-b73774346657,
  abstract     = {The interactions between a stream and nearby shallow aquifers were investigated in a mountain basin being polluted by mercury released during mining in central Nicaragua. Hourly data series of water levels and temperatures were analysed using cross-correlation. Resistivity imaging was used to map the subsurface and to complement the hydrological data interpretation. The results show the complex hydrogeological conditions that characterize the region, with weathering and fractured rock as main contributors to groundwater transport. The resistivity images suggest the presence of two vertical dykes perpendicular to the stream, and zones rich in clay. The data series indicate a rapid response from the aquifers to recharge events, followed by immediate discharge on a yearly basis. Furthermore, alternating periods of stream infiltration and aquifer discharge were identified. This work demonstrates that surface water pollution is a threat to groundwater quality in the area.},
  author       = {Mendoza, Alfredo and Ulriksen, Peter and Picado, Francisco and Dahlin, Torleif},
  issn         = {1099-1085},
  keyword      = {groundwater,pollution,Nicaragua,water,surface,cross-correlation,time series analysis,resistivity imaging},
  language     = {eng},
  number       = {13},
  pages        = {2264--2273},
  publisher    = {John Wiley & Sons},
  series       = {Hydrological Processes},
  title        = {Aquifer interactions with a polluted mountain river of Nicaragua},
  url          = {http://dx.doi.org/10.1002/hyp.6822},
  volume       = {22},
  year         = {2008},
}