A semi-automated, GIS-based framework for the mapping of supraglacial hydrology
Supraglacial drainage networks play an integral role in both glacier dynamics and run-off timing, and mapping them provides insight into their role in glacial systems. Here we present a reproducible approach for semi-automated mapping of supraglacial hydrologic features, which complements existing w...
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Cambridge University Press
2023
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ftdoajarticles:oai:doaj.org/article:55b638b0ed8f4e7287cc1e614526014c 2023-08-20T04:06:44+02:00 A semi-automated, GIS-based framework for the mapping of supraglacial hydrology Eleanor A Bash Colette Shellian Christine F Dow Greg Mcdermid Will Kochtitzky Dorota Medrzycka Luke Copland 2023-08-01T00:00:00Z https://doi.org/10.1017/jog.2022.92 https://doaj.org/article/55b638b0ed8f4e7287cc1e614526014c EN eng Cambridge University Press https://www.cambridge.org/core/product/identifier/S0022143022000922/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2022.92 0022-1430 1727-5652 https://doaj.org/article/55b638b0ed8f4e7287cc1e614526014c Journal of Glaciology, Vol 69, Pp 708-722 (2023) Glacier hydrology glacier mapping remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 article 2023 ftdoajarticles https://doi.org/10.1017/jog.2022.92 2023-07-30T00:36:44Z Supraglacial drainage networks play an integral role in both glacier dynamics and run-off timing, and mapping them provides insight into their role in glacial systems. Here we present a reproducible approach for semi-automated mapping of supraglacial hydrologic features, which complements existing work in automated and manual mapping by providing clear definitions for identification of features. This framework uses a digital terrain model (DTM) to identify potential flow routes on the glacier surface, which are then classified using a set of standardized rules based on the DTM and an orthomosaic. We found that the normalized difference water index calculated from digital imagery was influenced by image brightness and introduce a new approach using average RGB values to correct for this. Using this framework we mapped supraglacial drainage networks at Nàłùdäy and Thores Glacier, Canada. The framework was easier to implement with high-resolution (0.5 m) imagery and DTMs, compared to data with lower resolution (10 m), due to the increased detail in topography and feature boundaries at high-resolution. Lower-resolution data captured larger streams (>2 pixels wide), however, indicating that the framework can still be used at this resolution. Mapping supraglacial hydrology using standardized methods opens possibilities for investigating many questions relating to changes in supraglacial hydrology over time. Article in Journal/Newspaper glacier* Journal of Glaciology Directory of Open Access Journals: DOAJ Articles Canada Journal of Glaciology 1 15 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Glacier hydrology glacier mapping remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
spellingShingle |
Glacier hydrology glacier mapping remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 Eleanor A Bash Colette Shellian Christine F Dow Greg Mcdermid Will Kochtitzky Dorota Medrzycka Luke Copland A semi-automated, GIS-based framework for the mapping of supraglacial hydrology |
topic_facet |
Glacier hydrology glacier mapping remote sensing Environmental sciences GE1-350 Meteorology. Climatology QC851-999 |
description |
Supraglacial drainage networks play an integral role in both glacier dynamics and run-off timing, and mapping them provides insight into their role in glacial systems. Here we present a reproducible approach for semi-automated mapping of supraglacial hydrologic features, which complements existing work in automated and manual mapping by providing clear definitions for identification of features. This framework uses a digital terrain model (DTM) to identify potential flow routes on the glacier surface, which are then classified using a set of standardized rules based on the DTM and an orthomosaic. We found that the normalized difference water index calculated from digital imagery was influenced by image brightness and introduce a new approach using average RGB values to correct for this. Using this framework we mapped supraglacial drainage networks at Nàłùdäy and Thores Glacier, Canada. The framework was easier to implement with high-resolution (0.5 m) imagery and DTMs, compared to data with lower resolution (10 m), due to the increased detail in topography and feature boundaries at high-resolution. Lower-resolution data captured larger streams (>2 pixels wide), however, indicating that the framework can still be used at this resolution. Mapping supraglacial hydrology using standardized methods opens possibilities for investigating many questions relating to changes in supraglacial hydrology over time. |
format |
Article in Journal/Newspaper |
author |
Eleanor A Bash Colette Shellian Christine F Dow Greg Mcdermid Will Kochtitzky Dorota Medrzycka Luke Copland |
author_facet |
Eleanor A Bash Colette Shellian Christine F Dow Greg Mcdermid Will Kochtitzky Dorota Medrzycka Luke Copland |
author_sort |
Eleanor A Bash |
title |
A semi-automated, GIS-based framework for the mapping of supraglacial hydrology |
title_short |
A semi-automated, GIS-based framework for the mapping of supraglacial hydrology |
title_full |
A semi-automated, GIS-based framework for the mapping of supraglacial hydrology |
title_fullStr |
A semi-automated, GIS-based framework for the mapping of supraglacial hydrology |
title_full_unstemmed |
A semi-automated, GIS-based framework for the mapping of supraglacial hydrology |
title_sort |
semi-automated, gis-based framework for the mapping of supraglacial hydrology |
publisher |
Cambridge University Press |
publishDate |
2023 |
url |
https://doi.org/10.1017/jog.2022.92 https://doaj.org/article/55b638b0ed8f4e7287cc1e614526014c |
geographic |
Canada |
geographic_facet |
Canada |
genre |
glacier* Journal of Glaciology |
genre_facet |
glacier* Journal of Glaciology |
op_source |
Journal of Glaciology, Vol 69, Pp 708-722 (2023) |
op_relation |
https://www.cambridge.org/core/product/identifier/S0022143022000922/type/journal_article https://doaj.org/toc/0022-1430 https://doaj.org/toc/1727-5652 doi:10.1017/jog.2022.92 0022-1430 1727-5652 https://doaj.org/article/55b638b0ed8f4e7287cc1e614526014c |
op_doi |
https://doi.org/10.1017/jog.2022.92 |
container_title |
Journal of Glaciology |
container_start_page |
1 |
op_container_end_page |
15 |
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1774718019518332928 |