Establishment of channel networks in a digital elevation model of the prairie region through hydrological correction and geomorphological assessment

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DOIResolve DOI: http://doi.org/10.1080/07011784.2013.773788
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TypeArticle
Journal titleCanadian Water Resources Journal
ISSN0701-1784
Volume38
Issue1
Pages1223; # of pages: 12
SubjectCanadian digital elevation datum; Digital elevation model; Hydrological corrections; Hydrological modeling; Quantitative evaluation; Saskatchewan , Canada; Spatial correlations; Watershed delineation; Digital instruments; Forestry; Geomorphology; Quality control; Surveying
AbstractBuilding channel networks in flat regions of digital elevation models (DEMs) is important for watershed delineation and hydrological modeling, particularly for areas with gently-sloped terrain, such as the Canadian Prairies. Existing drainage analysis methods cannot effectively address the spatial correlations of elevation across the flat regions, and the quality of the DEM-derived channel network is mainly evaluated through visual inspection. In this study a hydrological correction method is developed that integrates elevation information from both the existing digital channel network and the original DEM. A set of geomorphological indices is then introduced for quantitative evaluation of DEM-derived channel networks from the perspectives of flow direction and drainage pattern. Both the DEM correction and network assessment methods are implemented in a GIS environment. Their performance is demonstrated through a case study in southern Saskatchewan, Canada. The generated channel network is consistent with the known hydrological information and contains fewer parallel channels compared with existing methods. The developed methods could be valuable for a wide range of applications using the Canadian Digital Elevation Data (CDED) within the context of the Canadian Prairie region. © 2013 Canadian Water Resources Association.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); NRC Institute for Research in Construction (IRC-IRC)
Peer reviewedYes
NPARC number21269700
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Record identifierdd60c277-d749-47b7-b3ee-61b24897a471
Record created2013-12-13
Record modified2016-05-09
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