Mapping groundwater-surface water interactions on a national scale for the stream network in Denmark
Study region: Denmark. Study focus: Groundwater-surface water interaction (GSI) occurs when groundwater discharges into surface water, or surface water seeps into the groundwater. Understanding GSI aids in understanding the quality and quantity of water and the ecosystem's health, assisting wat...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-04-01
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| Series: | Journal of Hydrology: Regional Studies |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214581822000283 |
| _version_ | 1819079112287846400 |
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| author | Gasper L. Sechu Bertel Nilsson Bo V. Iversen Anders B. Møller Mette B. Greve Lars Troldborg Mogens H. Greve |
| author_facet | Gasper L. Sechu Bertel Nilsson Bo V. Iversen Anders B. Møller Mette B. Greve Lars Troldborg Mogens H. Greve |
| author_sort | Gasper L. Sechu |
| collection | DOAJ |
| description | Study region: Denmark. Study focus: Groundwater-surface water interaction (GSI) occurs when groundwater discharges into surface water, or surface water seeps into the groundwater. Understanding GSI aids in understanding the quality and quantity of water and the ecosystem's health, assisting water resource management and the protection of land and aquatic environment. This paper presents a classification mapping routine to classify the Danish stream network into an established GSI typology framework. We mapped three classes for GSI contact types: connected clayey, connected sandy, and disconnected, and three classes for riparian flow paths: diffuse and/or overland, direct, and artificial drainage. New hydrological insights for the region: Results revealed that about 85% of Denmark's streams are connected to groundwater with approximately equal portions in sandy and clayey subsoil areas. Also, about 87% of these streams exchange water with groundwater, either as the only flow path or combined with other flow paths. Furthermore, 41% and 19% of stream sections receive riparian flow water through artificial drainage and diffuse/overland flow paths as the dominant flow path or combined. These numbers correspond to Denmark's land use, which is approximately 60% agricultural, restricting runoff potential, and half of which is artificially drained. We anticipate that the maps will assist policymakers in controlling water and pollutant transfer from the uplands to streams to attain good environmental status for surface and groundwater bodies. |
| first_indexed | 2024-12-21T19:23:48Z |
| format | Article |
| id | doaj.art-0f4dd4b048ec4dbda794719ac31514fe |
| institution | Directory Open Access Journal |
| issn | 2214-5818 |
| language | English |
| last_indexed | 2024-12-21T19:23:48Z |
| publishDate | 2022-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Hydrology: Regional Studies |
| spelling | doaj.art-0f4dd4b048ec4dbda794719ac31514fe2022-12-21T18:52:53ZengElsevierJournal of Hydrology: Regional Studies2214-58182022-04-0140101015Mapping groundwater-surface water interactions on a national scale for the stream network in DenmarkGasper L. Sechu0Bertel Nilsson1Bo V. Iversen2Anders B. Møller3Mette B. Greve4Lars Troldborg5Mogens H. Greve6Department of Agroecology, Aarhus University, Tjele DK-8830, Denmark; Corresponding author.Department of Hydrology, Geological Survey of Denmark and Greenland (GEUS), Copenhagen DK-1350, DenmarkDepartment of Agroecology, Aarhus University, Tjele DK-8830, DenmarkDepartment of Agroecology, Aarhus University, Tjele DK-8830, DenmarkDepartment of Agroecology, Aarhus University, Tjele DK-8830, DenmarkDepartment of Hydrology, Geological Survey of Denmark and Greenland (GEUS), Copenhagen DK-1350, DenmarkDepartment of Agroecology, Aarhus University, Tjele DK-8830, DenmarkStudy region: Denmark. Study focus: Groundwater-surface water interaction (GSI) occurs when groundwater discharges into surface water, or surface water seeps into the groundwater. Understanding GSI aids in understanding the quality and quantity of water and the ecosystem's health, assisting water resource management and the protection of land and aquatic environment. This paper presents a classification mapping routine to classify the Danish stream network into an established GSI typology framework. We mapped three classes for GSI contact types: connected clayey, connected sandy, and disconnected, and three classes for riparian flow paths: diffuse and/or overland, direct, and artificial drainage. New hydrological insights for the region: Results revealed that about 85% of Denmark's streams are connected to groundwater with approximately equal portions in sandy and clayey subsoil areas. Also, about 87% of these streams exchange water with groundwater, either as the only flow path or combined with other flow paths. Furthermore, 41% and 19% of stream sections receive riparian flow water through artificial drainage and diffuse/overland flow paths as the dominant flow path or combined. These numbers correspond to Denmark's land use, which is approximately 60% agricultural, restricting runoff potential, and half of which is artificially drained. We anticipate that the maps will assist policymakers in controlling water and pollutant transfer from the uplands to streams to attain good environmental status for surface and groundwater bodies.http://www.sciencedirect.com/science/article/pii/S2214581822000283Groundwater-surface water interactionClassificationGeographic information systemMapping |
| spellingShingle | Gasper L. Sechu Bertel Nilsson Bo V. Iversen Anders B. Møller Mette B. Greve Lars Troldborg Mogens H. Greve Mapping groundwater-surface water interactions on a national scale for the stream network in Denmark Journal of Hydrology: Regional Studies Groundwater-surface water interaction Classification Geographic information system Mapping |
| title | Mapping groundwater-surface water interactions on a national scale for the stream network in Denmark |
| title_full | Mapping groundwater-surface water interactions on a national scale for the stream network in Denmark |
| title_fullStr | Mapping groundwater-surface water interactions on a national scale for the stream network in Denmark |
| title_full_unstemmed | Mapping groundwater-surface water interactions on a national scale for the stream network in Denmark |
| title_short | Mapping groundwater-surface water interactions on a national scale for the stream network in Denmark |
| title_sort | mapping groundwater surface water interactions on a national scale for the stream network in denmark |
| topic | Groundwater-surface water interaction Classification Geographic information system Mapping |
| url | http://www.sciencedirect.com/science/article/pii/S2214581822000283 |
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