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 t...
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ftunivhelsihelda:oai:helda.helsinki.fi:10138/341226 2024-01-07T09:45:27+01:00 The effect of river regulation on groundwater flow patterns and the hydrological conditions of an aapa mire in northern Finland Åberg, Susanne Korkka-Niemi, Kirsti Rautio, Anne Brita Kristina Åberg, Annika Department of Geosciences and Geography Teachers' Academy 2022-03-02T15:32:01Z 30 application/pdf http://hdl.handle.net/10138/341226 eng eng Elsevier B.V. 10.1016/j.ejrh.2022.101044 Åberg , S , Korkka-Niemi , K , Rautio , A B K & Åberg , A 2022 , ' The effect of river regulation on groundwater flow patterns and the hydrological conditions of an aapa mire in northern Finland ' , Journal of hydrology. Regional studies , vol. 40 , 101044 . https://doi.org/10.1016/j.ejrh.2022.101044 ORCID: /0000-0002-3370-2207/work/109261986 ORCID: /0000-0002-3215-4384/work/127008227 85125151200 bbfe170b-d114-43f5-9eda-534b64155c00 http://hdl.handle.net/10138/341226 000783336300002 cc_by openAccess info:eu-repo/semantics/openAccess 1171 Geosciences Groundwater flow modelling Mire Groundwater discharge Regulation Flooding Groundwater-dependent ecosystems BANK-STORAGE MODELS WATER AQUIFER EXCHANGE RESOURCES SOFTWARE ISOTOPES WETLANDS DYNAMICS Article publishedVersion 2022 ftunivhelsihelda 2023-12-14T00:09:28Z 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. Peer reviewed Article in Journal/Newspaper Northern Finland HELDA – University of Helsinki Open Repository Journal of Hydrology: Regional Studies 40 101044 |
institution |
Open Polar |
collection |
HELDA – University of Helsinki Open Repository |
op_collection_id |
ftunivhelsihelda |
language |
English |
topic |
1171 Geosciences Groundwater flow modelling Mire Groundwater discharge Regulation Flooding Groundwater-dependent ecosystems BANK-STORAGE MODELS WATER AQUIFER EXCHANGE RESOURCES SOFTWARE ISOTOPES WETLANDS DYNAMICS |
spellingShingle |
1171 Geosciences Groundwater flow modelling Mire Groundwater discharge Regulation Flooding Groundwater-dependent ecosystems BANK-STORAGE MODELS WATER AQUIFER EXCHANGE RESOURCES SOFTWARE ISOTOPES WETLANDS DYNAMICS Åberg, Susanne Korkka-Niemi, Kirsti Rautio, Anne Brita Kristina Åberg, Annika The effect of river regulation on groundwater flow patterns and the hydrological conditions of an aapa mire in northern Finland |
topic_facet |
1171 Geosciences Groundwater flow modelling Mire Groundwater discharge Regulation Flooding Groundwater-dependent ecosystems BANK-STORAGE MODELS WATER AQUIFER EXCHANGE RESOURCES SOFTWARE ISOTOPES WETLANDS DYNAMICS |
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. Peer reviewed |
author2 |
Department of Geosciences and Geography Teachers' Academy |
format |
Article in Journal/Newspaper |
author |
Åberg, Susanne Korkka-Niemi, Kirsti Rautio, Anne Brita Kristina Åberg, Annika |
author_facet |
Åberg, Susanne Korkka-Niemi, Kirsti Rautio, Anne Brita Kristina Åberg, Annika |
author_sort |
Åberg, Susanne |
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 B.V. |
publishDate |
2022 |
url |
http://hdl.handle.net/10138/341226 |
genre |
Northern Finland |
genre_facet |
Northern Finland |
op_relation |
10.1016/j.ejrh.2022.101044 Åberg , S , Korkka-Niemi , K , Rautio , A B K & Åberg , A 2022 , ' The effect of river regulation on groundwater flow patterns and the hydrological conditions of an aapa mire in northern Finland ' , Journal of hydrology. Regional studies , vol. 40 , 101044 . https://doi.org/10.1016/j.ejrh.2022.101044 ORCID: /0000-0002-3370-2207/work/109261986 ORCID: /0000-0002-3215-4384/work/127008227 85125151200 bbfe170b-d114-43f5-9eda-534b64155c00 http://hdl.handle.net/10138/341226 000783336300002 |
op_rights |
cc_by openAccess info:eu-repo/semantics/openAccess |
container_title |
Journal of Hydrology: Regional Studies |
container_volume |
40 |
container_start_page |
101044 |
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1787426982179373056 |