Quantifying the effects of watershed subdivision scale and spatial density of weather inputs on hydrological simulations in a Norwegian Arctic watershed
The effects of watershed subdivisions on hydrological simulations have not been evaluated in Arctic conditions yet. This study applied the Soil and Water Assessment Tool and the threshold drainage area (TDA) technique to evaluate the impacts of watershed subdivision on hydrological simulations at a...
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Online Access: | https://hdl.handle.net/10037/23559 https://doi.org/10.2166/wcc.2021.173 |
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ftunivtroemsoe:oai:munin.uit.no:10037/23559 2023-05-15T14:23:58+02:00 Quantifying the effects of watershed subdivision scale and spatial density of weather inputs on hydrological simulations in a Norwegian Arctic watershed Bui, Minh Tuan Lu, Jinmei Nie, Linmei 2021-12-01 https://hdl.handle.net/10037/23559 https://doi.org/10.2166/wcc.2021.173 eng eng IWA Publisching Bui, M.T. (2022). Hydrological Modelling and Climate Change Impact Assessment on Future Floods in the Norwegian Arctic Catchments. (Doctoral thesis). https://hdl.handle.net/10037/26021 Journal of Water and Climate Change Bui M T, Lu J, Nie L. Quantifying the effects of watershed subdivision scale and spatial density of weather inputs on hydrological simulations in a Norwegian Arctic watershed. Journal of Water and Climate Change. 2021 FRIDAID 1960460 doi:10.2166/wcc.2021.173 2040-2244 https://hdl.handle.net/10037/23559 openAccess Copyright 2021 The Author(s) VDP::Technology: 500 VDP::Teknologi: 500 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2021 ftunivtroemsoe https://doi.org/10.2166/wcc.2021.173 2022-08-10T22:59:59Z The effects of watershed subdivisions on hydrological simulations have not been evaluated in Arctic conditions yet. This study applied the Soil and Water Assessment Tool and the threshold drainage area (TDA) technique to evaluate the impacts of watershed subdivision on hydrological simulations at a 5,913-km 2 Arctic watershed, Målselv. The watershed was discretized according to four TDA scheme scales including 200, 2,000, 5,000, and 10,000 ha. The impacts of different TDA schemes on hydrological simulations in water balance components, snowmelt runoff, and streamflow were investigated. The study revealed that the complexity of terrain and topographic attributes altered significantly in the coarse discretizations: (1) total stream length (−47.2 to −74.6%); (2) average stream slope (−68 to −83%); and (3) drainage density (−24.2 to −51.5%). The spatial density of weather grid integration reduced from −5 to −33.33% in the coarse schemes. The annual mean potential evapotranspiration, evapotranspiration, and lateral flow slightly decreased, while areal rainfall, surface runoff, and water yield slightly increased with the increases of TDAs. It was concluded that the fine TDAs produced finer and higher ranges of snowmelt runoff volume across the watershed. All TDAs had similar capacities to replicate the observed tendency of monthly mean streamflow hydrograph, except overestimated/underestimated peak flows. Spatial variation of streamflow was well analyzed in the fine schemes with high density of stream networks, while the coarse schemes simplified this. Watershed subdivisions affected model performances, in the way of decreasing the accuracy of monthly streamflow simulation, at 60% of investigated hydro-gauging stations (3/5 stations) and in the upstream. Furthermore, watershed subdivisions strongly affected the calibration process regarding the changes in sensitivity ranking of 18 calibrated model parameters and time it took to calibrate. Article in Journal/Newspaper Arctic Arctic Målselv University of Tromsø: Munin Open Research Archive Arctic Målselv ENVELOPE(18.615,18.615,69.124,69.124) Journal of Water and Climate Change 12 8 3518 3543 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Technology: 500 VDP::Teknologi: 500 |
spellingShingle |
VDP::Technology: 500 VDP::Teknologi: 500 Bui, Minh Tuan Lu, Jinmei Nie, Linmei Quantifying the effects of watershed subdivision scale and spatial density of weather inputs on hydrological simulations in a Norwegian Arctic watershed |
topic_facet |
VDP::Technology: 500 VDP::Teknologi: 500 |
description |
The effects of watershed subdivisions on hydrological simulations have not been evaluated in Arctic conditions yet. This study applied the Soil and Water Assessment Tool and the threshold drainage area (TDA) technique to evaluate the impacts of watershed subdivision on hydrological simulations at a 5,913-km 2 Arctic watershed, Målselv. The watershed was discretized according to four TDA scheme scales including 200, 2,000, 5,000, and 10,000 ha. The impacts of different TDA schemes on hydrological simulations in water balance components, snowmelt runoff, and streamflow were investigated. The study revealed that the complexity of terrain and topographic attributes altered significantly in the coarse discretizations: (1) total stream length (−47.2 to −74.6%); (2) average stream slope (−68 to −83%); and (3) drainage density (−24.2 to −51.5%). The spatial density of weather grid integration reduced from −5 to −33.33% in the coarse schemes. The annual mean potential evapotranspiration, evapotranspiration, and lateral flow slightly decreased, while areal rainfall, surface runoff, and water yield slightly increased with the increases of TDAs. It was concluded that the fine TDAs produced finer and higher ranges of snowmelt runoff volume across the watershed. All TDAs had similar capacities to replicate the observed tendency of monthly mean streamflow hydrograph, except overestimated/underestimated peak flows. Spatial variation of streamflow was well analyzed in the fine schemes with high density of stream networks, while the coarse schemes simplified this. Watershed subdivisions affected model performances, in the way of decreasing the accuracy of monthly streamflow simulation, at 60% of investigated hydro-gauging stations (3/5 stations) and in the upstream. Furthermore, watershed subdivisions strongly affected the calibration process regarding the changes in sensitivity ranking of 18 calibrated model parameters and time it took to calibrate. |
format |
Article in Journal/Newspaper |
author |
Bui, Minh Tuan Lu, Jinmei Nie, Linmei |
author_facet |
Bui, Minh Tuan Lu, Jinmei Nie, Linmei |
author_sort |
Bui, Minh Tuan |
title |
Quantifying the effects of watershed subdivision scale and spatial density of weather inputs on hydrological simulations in a Norwegian Arctic watershed |
title_short |
Quantifying the effects of watershed subdivision scale and spatial density of weather inputs on hydrological simulations in a Norwegian Arctic watershed |
title_full |
Quantifying the effects of watershed subdivision scale and spatial density of weather inputs on hydrological simulations in a Norwegian Arctic watershed |
title_fullStr |
Quantifying the effects of watershed subdivision scale and spatial density of weather inputs on hydrological simulations in a Norwegian Arctic watershed |
title_full_unstemmed |
Quantifying the effects of watershed subdivision scale and spatial density of weather inputs on hydrological simulations in a Norwegian Arctic watershed |
title_sort |
quantifying the effects of watershed subdivision scale and spatial density of weather inputs on hydrological simulations in a norwegian arctic watershed |
publisher |
IWA Publisching |
publishDate |
2021 |
url |
https://hdl.handle.net/10037/23559 https://doi.org/10.2166/wcc.2021.173 |
long_lat |
ENVELOPE(18.615,18.615,69.124,69.124) |
geographic |
Arctic Målselv |
geographic_facet |
Arctic Målselv |
genre |
Arctic Arctic Målselv |
genre_facet |
Arctic Arctic Målselv |
op_relation |
Bui, M.T. (2022). Hydrological Modelling and Climate Change Impact Assessment on Future Floods in the Norwegian Arctic Catchments. (Doctoral thesis). https://hdl.handle.net/10037/26021 Journal of Water and Climate Change Bui M T, Lu J, Nie L. Quantifying the effects of watershed subdivision scale and spatial density of weather inputs on hydrological simulations in a Norwegian Arctic watershed. Journal of Water and Climate Change. 2021 FRIDAID 1960460 doi:10.2166/wcc.2021.173 2040-2244 https://hdl.handle.net/10037/23559 |
op_rights |
openAccess Copyright 2021 The Author(s) |
op_doi |
https://doi.org/10.2166/wcc.2021.173 |
container_title |
Journal of Water and Climate Change |
container_volume |
12 |
container_issue |
8 |
container_start_page |
3518 |
op_container_end_page |
3543 |
_version_ |
1766296424641724416 |