The effect of river regulation on groundwater flow patterns and the hydrological conditions of an aapa mire in northern Finland
Study region: Northern Finland. Study focus: This study examined long-term (decade-scale) hydrological and ecological consequences of dam construction and subsequent river regulation on the environmentally protected Viiankiaapa mire. Pre-regulation floods affected the hydrology of the riverbanks and...
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ftdoajarticles:oai:doaj.org/article:1a94fa7276f046f0955ee2073978cd53 2023-05-15T17:42:21+02:00 The effect of river regulation on groundwater flow patterns and the hydrological conditions of an aapa mire in northern Finland Susanne Charlotta Åberg Kirsti Korkka-Niemi Anne Rautio Annika Katarina Åberg 2022-04-01T00:00:00Z https://doi.org/10.1016/j.ejrh.2022.101044 https://doaj.org/article/1a94fa7276f046f0955ee2073978cd53 EN eng Elsevier http://www.sciencedirect.com/science/article/pii/S221458182200057X https://doaj.org/toc/2214-5818 2214-5818 doi:10.1016/j.ejrh.2022.101044 https://doaj.org/article/1a94fa7276f046f0955ee2073978cd53 Journal of Hydrology: Regional Studies, Vol 40, Iss , Pp 101044- (2022) Groundwater flow modelling Mire Groundwater discharge Regulation Flooding Groundwater-dependent ecosystems Physical geography GB3-5030 Geology QE1-996.5 article 2022 ftdoajarticles https://doi.org/10.1016/j.ejrh.2022.101044 2022-12-31T01:53:46Z Study region: Northern Finland. Study focus: This study examined long-term (decade-scale) hydrological and ecological consequences of dam construction and subsequent river regulation on the environmentally protected Viiankiaapa mire. Pre-regulation floods affected the hydrology of the riverbanks and the Viiankiaapa mire, which contain habitats of flood-dependent or groundwater-influenced ecosystems. Groundwater discharge and flow patterns and pre-regulation flood coverage were simulated to investigate the impact of river regulation on the mire area. New hydrological insights for the region: The flood models indicate that regular flooding covered the westernmost part of the mire before the regulation. Groundwater modelling suggests that the regulation has raised the locations of springs in the river shore, reduced the hydraulic gradient towards the river, raised the groundwater table in the river banks and the western part of the Viiankiaapa mire, and increased groundwater discharge in the mire. The groundwater flow models and the stable isotopic composition of water indicate that the constructed dam changed the groundwater flow directions close to dam. The ecological effects of regulation were mixed: the studied flood-dependent plant species declined due to the reduction in floods after regulation. Conversely, the occurrence of Hamatocaulis vernicosus and Hamatocaulis lapponicus appears to be related to the high water table and groundwater discharge areas in the mire, suggesting suitable habitat for these species may have expanded after the regulation. Article in Journal/Newspaper Northern Finland Directory of Open Access Journals: DOAJ Articles Journal of Hydrology: Regional Studies 40 101044 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Groundwater flow modelling Mire Groundwater discharge Regulation Flooding Groundwater-dependent ecosystems Physical geography GB3-5030 Geology QE1-996.5 |
spellingShingle |
Groundwater flow modelling Mire Groundwater discharge Regulation Flooding Groundwater-dependent ecosystems Physical geography GB3-5030 Geology QE1-996.5 Susanne Charlotta Åberg Kirsti Korkka-Niemi Anne Rautio Annika Katarina Åberg The effect of river regulation on groundwater flow patterns and the hydrological conditions of an aapa mire in northern Finland |
topic_facet |
Groundwater flow modelling Mire Groundwater discharge Regulation Flooding Groundwater-dependent ecosystems Physical geography GB3-5030 Geology QE1-996.5 |
description |
Study region: Northern Finland. Study focus: This study examined long-term (decade-scale) hydrological and ecological consequences of dam construction and subsequent river regulation on the environmentally protected Viiankiaapa mire. Pre-regulation floods affected the hydrology of the riverbanks and the Viiankiaapa mire, which contain habitats of flood-dependent or groundwater-influenced ecosystems. Groundwater discharge and flow patterns and pre-regulation flood coverage were simulated to investigate the impact of river regulation on the mire area. New hydrological insights for the region: The flood models indicate that regular flooding covered the westernmost part of the mire before the regulation. Groundwater modelling suggests that the regulation has raised the locations of springs in the river shore, reduced the hydraulic gradient towards the river, raised the groundwater table in the river banks and the western part of the Viiankiaapa mire, and increased groundwater discharge in the mire. The groundwater flow models and the stable isotopic composition of water indicate that the constructed dam changed the groundwater flow directions close to dam. The ecological effects of regulation were mixed: the studied flood-dependent plant species declined due to the reduction in floods after regulation. Conversely, the occurrence of Hamatocaulis vernicosus and Hamatocaulis lapponicus appears to be related to the high water table and groundwater discharge areas in the mire, suggesting suitable habitat for these species may have expanded after the regulation. |
format |
Article in Journal/Newspaper |
author |
Susanne Charlotta Åberg Kirsti Korkka-Niemi Anne Rautio Annika Katarina Åberg |
author_facet |
Susanne Charlotta Åberg Kirsti Korkka-Niemi Anne Rautio Annika Katarina Åberg |
author_sort |
Susanne Charlotta Åberg |
title |
The effect of river regulation on groundwater flow patterns and the hydrological conditions of an aapa mire in northern Finland |
title_short |
The effect of river regulation on groundwater flow patterns and the hydrological conditions of an aapa mire in northern Finland |
title_full |
The effect of river regulation on groundwater flow patterns and the hydrological conditions of an aapa mire in northern Finland |
title_fullStr |
The effect of river regulation on groundwater flow patterns and the hydrological conditions of an aapa mire in northern Finland |
title_full_unstemmed |
The effect of river regulation on groundwater flow patterns and the hydrological conditions of an aapa mire in northern Finland |
title_sort |
effect of river regulation on groundwater flow patterns and the hydrological conditions of an aapa mire in northern finland |
publisher |
Elsevier |
publishDate |
2022 |
url |
https://doi.org/10.1016/j.ejrh.2022.101044 https://doaj.org/article/1a94fa7276f046f0955ee2073978cd53 |
genre |
Northern Finland |
genre_facet |
Northern Finland |
op_source |
Journal of Hydrology: Regional Studies, Vol 40, Iss , Pp 101044- (2022) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S221458182200057X https://doaj.org/toc/2214-5818 2214-5818 doi:10.1016/j.ejrh.2022.101044 https://doaj.org/article/1a94fa7276f046f0955ee2073978cd53 |
op_doi |
https://doi.org/10.1016/j.ejrh.2022.101044 |
container_title |
Journal of Hydrology: Regional Studies |
container_volume |
40 |
container_start_page |
101044 |
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1766144194987950080 |