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A new triangular multiple flow-direction algorithm for computing upslope areas from gridded digital elevation models
Stockholm University, Faculty of Science, Department of Physical Geography and Quaternary Geology.
2007 (English)In: Water Resources Research, Vol. 43, W04501- p.Article in journal (Refereed) Published
Abstract [en]

Gridded digital elevation data, often referred to as DEMs, are one of the most widely

available forms of environmental data. Topographic analysis of DEMs can take many

forms, but in hydrologic and geomorphologic applications it is typically used as a

surrogate for the spatial variation of hydrological conditions (topographic indices) and

flow routing. Here we report on a new flow routing algorithm and compare it to three

common classes of algorithms currently in widespread use. The advantage of the new

algorithm is that unrealistic dispersion on planar or concave hillslopes is avoided, whereas

multiple flow directions are allowed on convex hillslopes. We suggest that this new

triangular multiple flow direction algorithm (MD1) is more appropriate for a range of

flow routing and topographic index applications.

Place, publisher, year, edition, pages
2007. Vol. 43, W04501- p.
Keyword [en]
topography, hydrology
URN: urn:nbn:se:su:diva-16655DOI: doi:10.1029/2006WR005128ISI: 000245584700002OAI: diva2:183175
Available from: 2007-10-08 Created: 2007-10-08 Last updated: 2011-01-11Bibliographically approved

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