The suitability of using ASTER GDEM2 for terrain-based extraction of stream channel networks in a lowland Arctic permafrost catchment
Seasonally inundated areas and water-saturated soils are common features of lowland Arctic and sub-Arctic permafrost environments. With the onset of snow melt, and water percolation down through the snowpack, a principal factor controlling stream channel flow, aside from active layer depth, is topog...
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Geographical Society of Finland
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ftdoajarticles:oai:doaj.org/article:f897b914d6684b149f166615232525d4 2023-05-15T14:52:01+02:00 The suitability of using ASTER GDEM2 for terrain-based extraction of stream channel networks in a lowland Arctic permafrost catchment Anna Maria Trofaier W Gareth Rees 2015-03-01T00:00:00Z https://doi.org/10.11143/46290 https://doaj.org/article/f897b914d6684b149f166615232525d4 EN eng Geographical Society of Finland http://ojs.tsv.fi/index.php/fennia/article/view/46290/14639 https://doaj.org/toc/1798-5617 doi:10.11143/46290 1798-5617 https://doaj.org/article/f897b914d6684b149f166615232525d4 Fennia: International Journal of Geography, Vol 193, Iss 1, Pp 66-73 (2015) Geography (General) G1-922 article 2015 ftdoajarticles https://doi.org/10.11143/46290 2022-12-31T03:52:43Z Seasonally inundated areas and water-saturated soils are common features of lowland Arctic and sub-Arctic permafrost environments. With the onset of snow melt, and water percolation down through the snowpack, a principal factor controlling stream channel flow, aside from active layer depth, is topography. This paper investigates stream channel networks derived from the advanced spaceborne thermal emission and reflection radiometer (ASTER) global digital elevation model (GDEM) version 2 in a static terrain-based GIS-model. The suitability of using the ASTER GDEM2 for modelling the drainage network over a low-relief terrain is assessed. The aim is to use GDEM2 for the analysis of the stream channel network and to establish the network’s connectivity to previously observed spring flood patterns over the Yamal peninsula. As such, there are two parts to this study: 1) DEM validation and 2) stream channel network analysis. The results of the DEM validation study show that the root mean square error (RMSE) of the GDEM2 and reference data is approx. 10 m when compared to both reference data sets (RMSE = 12.17 m, N = 86 and RMSE = 9.64, N = 506,877), implying that the GDEM2 is sufficiently accurate for terrain-based modelling. The low connectivity between the stream channel network and seasonal inundation suggests that topographic controls play a less important role compared to the possible overbanking of lakes and basin overflow. However, drainage densities for investigated drainage basins were significantly lower than those expected from typical Arctic basins. Both more sophisticated modelling techniques as well as higher spatial resolution DEMs are needed to extract the stream channel network more accurately and hence establish a more comprehensive link between the drainage network and seasonally inundated areas. Article in Journal/Newspaper Arctic permafrost Yamal Peninsula Directory of Open Access Journals: DOAJ Articles Arctic Yamal Peninsula ENVELOPE(69.873,69.873,70.816,70.816) Fennia – International Journal of Geography |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Geography (General) G1-922 |
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Geography (General) G1-922 Anna Maria Trofaier W Gareth Rees The suitability of using ASTER GDEM2 for terrain-based extraction of stream channel networks in a lowland Arctic permafrost catchment |
topic_facet |
Geography (General) G1-922 |
description |
Seasonally inundated areas and water-saturated soils are common features of lowland Arctic and sub-Arctic permafrost environments. With the onset of snow melt, and water percolation down through the snowpack, a principal factor controlling stream channel flow, aside from active layer depth, is topography. This paper investigates stream channel networks derived from the advanced spaceborne thermal emission and reflection radiometer (ASTER) global digital elevation model (GDEM) version 2 in a static terrain-based GIS-model. The suitability of using the ASTER GDEM2 for modelling the drainage network over a low-relief terrain is assessed. The aim is to use GDEM2 for the analysis of the stream channel network and to establish the network’s connectivity to previously observed spring flood patterns over the Yamal peninsula. As such, there are two parts to this study: 1) DEM validation and 2) stream channel network analysis. The results of the DEM validation study show that the root mean square error (RMSE) of the GDEM2 and reference data is approx. 10 m when compared to both reference data sets (RMSE = 12.17 m, N = 86 and RMSE = 9.64, N = 506,877), implying that the GDEM2 is sufficiently accurate for terrain-based modelling. The low connectivity between the stream channel network and seasonal inundation suggests that topographic controls play a less important role compared to the possible overbanking of lakes and basin overflow. However, drainage densities for investigated drainage basins were significantly lower than those expected from typical Arctic basins. Both more sophisticated modelling techniques as well as higher spatial resolution DEMs are needed to extract the stream channel network more accurately and hence establish a more comprehensive link between the drainage network and seasonally inundated areas. |
format |
Article in Journal/Newspaper |
author |
Anna Maria Trofaier W Gareth Rees |
author_facet |
Anna Maria Trofaier W Gareth Rees |
author_sort |
Anna Maria Trofaier |
title |
The suitability of using ASTER GDEM2 for terrain-based extraction of stream channel networks in a lowland Arctic permafrost catchment |
title_short |
The suitability of using ASTER GDEM2 for terrain-based extraction of stream channel networks in a lowland Arctic permafrost catchment |
title_full |
The suitability of using ASTER GDEM2 for terrain-based extraction of stream channel networks in a lowland Arctic permafrost catchment |
title_fullStr |
The suitability of using ASTER GDEM2 for terrain-based extraction of stream channel networks in a lowland Arctic permafrost catchment |
title_full_unstemmed |
The suitability of using ASTER GDEM2 for terrain-based extraction of stream channel networks in a lowland Arctic permafrost catchment |
title_sort |
suitability of using aster gdem2 for terrain-based extraction of stream channel networks in a lowland arctic permafrost catchment |
publisher |
Geographical Society of Finland |
publishDate |
2015 |
url |
https://doi.org/10.11143/46290 https://doaj.org/article/f897b914d6684b149f166615232525d4 |
long_lat |
ENVELOPE(69.873,69.873,70.816,70.816) |
geographic |
Arctic Yamal Peninsula |
geographic_facet |
Arctic Yamal Peninsula |
genre |
Arctic permafrost Yamal Peninsula |
genre_facet |
Arctic permafrost Yamal Peninsula |
op_source |
Fennia: International Journal of Geography, Vol 193, Iss 1, Pp 66-73 (2015) |
op_relation |
http://ojs.tsv.fi/index.php/fennia/article/view/46290/14639 https://doaj.org/toc/1798-5617 doi:10.11143/46290 1798-5617 https://doaj.org/article/f897b914d6684b149f166615232525d4 |
op_doi |
https://doi.org/10.11143/46290 |
container_title |
Fennia – International Journal of Geography |
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1766323150269710336 |