Changes in the discharge regime of Finnish rivers
Study region: Finland divided into three subregions, each representing different environmental conditions. Study focus: This study investigates long-term changes in unregulated river discharge. Trends in high- and low-flow event volumes, magnitudes, timings, and frequencies are analysed across 36 ga...
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ftdoajarticles:oai:doaj.org/article:e30b810674564801b084c72de093e5e5 2024-09-15T18:38:03+00:00 Changes in the discharge regime of Finnish rivers Karoliina Lintunen Elina Kasvi Cintia B. Uvo Petteri Alho 2024-06-01T00:00:00Z https://doi.org/10.1016/j.ejrh.2024.101749 https://doaj.org/article/e30b810674564801b084c72de093e5e5 EN eng Elsevier http://www.sciencedirect.com/science/article/pii/S2214581824000971 https://doaj.org/toc/2214-5818 2214-5818 doi:10.1016/j.ejrh.2024.101749 https://doaj.org/article/e30b810674564801b084c72de093e5e5 Journal of Hydrology: Regional Studies, Vol 53, Iss , Pp 101749- (2024) Time series analysis Discharge Trends Finnish rivers Physical geography GB3-5030 Geology QE1-996.5 article 2024 ftdoajarticles https://doi.org/10.1016/j.ejrh.2024.101749 2024-08-05T17:49:14Z Study region: Finland divided into three subregions, each representing different environmental conditions. Study focus: This study investigates long-term changes in unregulated river discharge. Trends in high- and low-flow event volumes, magnitudes, timings, and frequencies are analysed across 36 gauging stations in 19 watershed areas from 1911 to 2021. The average measurement period for discharge in the stations is 60 years, with over 765,000 daily records examined statistically. New hydrological insights for the region: High-flow events show advancing timings and decreasing magnitudes, notably in the coastal region and less so in the north. These events, occurring from 6 to 68 days earlier in 21 stations, now in the late winter and early spring, align with increasing spring low-flow volumes. On a monthly scale, a trend of rising volume magnitude is observed in late autumn, winter, and early spring, especially in Northern Finland's rivers. High flows during autumn and winter occur 30 to 60 days later in 8 stations. Changes in the monthly mean volumes were found in 30 stations, suggesting a redistribution of annual volumes across a broader time period, while the overall annual volumes have remained relatively unchanged. This underscores the complexity of hydrological patterns, emphasizing the need to consider total volumes and their temporal distribution in analyses. The findings enhance understanding of current changes and align with findings in the boreal-subarctic area. Article in Journal/Newspaper Subarctic Directory of Open Access Journals: DOAJ Articles Journal of Hydrology: Regional Studies 53 101749 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Time series analysis Discharge Trends Finnish rivers Physical geography GB3-5030 Geology QE1-996.5 |
spellingShingle |
Time series analysis Discharge Trends Finnish rivers Physical geography GB3-5030 Geology QE1-996.5 Karoliina Lintunen Elina Kasvi Cintia B. Uvo Petteri Alho Changes in the discharge regime of Finnish rivers |
topic_facet |
Time series analysis Discharge Trends Finnish rivers Physical geography GB3-5030 Geology QE1-996.5 |
description |
Study region: Finland divided into three subregions, each representing different environmental conditions. Study focus: This study investigates long-term changes in unregulated river discharge. Trends in high- and low-flow event volumes, magnitudes, timings, and frequencies are analysed across 36 gauging stations in 19 watershed areas from 1911 to 2021. The average measurement period for discharge in the stations is 60 years, with over 765,000 daily records examined statistically. New hydrological insights for the region: High-flow events show advancing timings and decreasing magnitudes, notably in the coastal region and less so in the north. These events, occurring from 6 to 68 days earlier in 21 stations, now in the late winter and early spring, align with increasing spring low-flow volumes. On a monthly scale, a trend of rising volume magnitude is observed in late autumn, winter, and early spring, especially in Northern Finland's rivers. High flows during autumn and winter occur 30 to 60 days later in 8 stations. Changes in the monthly mean volumes were found in 30 stations, suggesting a redistribution of annual volumes across a broader time period, while the overall annual volumes have remained relatively unchanged. This underscores the complexity of hydrological patterns, emphasizing the need to consider total volumes and their temporal distribution in analyses. The findings enhance understanding of current changes and align with findings in the boreal-subarctic area. |
format |
Article in Journal/Newspaper |
author |
Karoliina Lintunen Elina Kasvi Cintia B. Uvo Petteri Alho |
author_facet |
Karoliina Lintunen Elina Kasvi Cintia B. Uvo Petteri Alho |
author_sort |
Karoliina Lintunen |
title |
Changes in the discharge regime of Finnish rivers |
title_short |
Changes in the discharge regime of Finnish rivers |
title_full |
Changes in the discharge regime of Finnish rivers |
title_fullStr |
Changes in the discharge regime of Finnish rivers |
title_full_unstemmed |
Changes in the discharge regime of Finnish rivers |
title_sort |
changes in the discharge regime of finnish rivers |
publisher |
Elsevier |
publishDate |
2024 |
url |
https://doi.org/10.1016/j.ejrh.2024.101749 https://doaj.org/article/e30b810674564801b084c72de093e5e5 |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Journal of Hydrology: Regional Studies, Vol 53, Iss , Pp 101749- (2024) |
op_relation |
http://www.sciencedirect.com/science/article/pii/S2214581824000971 https://doaj.org/toc/2214-5818 2214-5818 doi:10.1016/j.ejrh.2024.101749 https://doaj.org/article/e30b810674564801b084c72de093e5e5 |
op_doi |
https://doi.org/10.1016/j.ejrh.2024.101749 |
container_title |
Journal of Hydrology: Regional Studies |
container_volume |
53 |
container_start_page |
101749 |
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1810482385885593600 |