uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
A fast and efficient algorithm to map prerequisites of landslides in sensitive clays based on detailed soil and topographical information
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Geophysics.
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, LUVAL.
2015 (English)In: Computers & Geosciences, ISSN 0098-3004, E-ISSN 1873-7803, Vol. 75, 88-95 p.Article in journal (Refereed) Published
Abstract [en]

We present an algorithm developed for GIS-applications in order to produce maps of landside susceptibility in postglacial and glacial sediments in Sweden. The algorithm operates on detailed topographic and Quaternary deposit data. We compare our algorithm to two similar computational schemes based on a global visibility operator and a shadow-casting algorithm. We find that our algorithm produces more reliable results in the vicinity of stable material than the global visibility algorithm. We also conclude that our algorithm is more computationally efficient than the other two methods, which is important when we may want to assess the effects of uncertainty in the data by evaluating many different models. Our method also provides the possibility to take other data into account We show how different soil types with different geotechnical properties may be modelled. Our algorithm may also take depth information, i.e. the thicknesses of the deposits into account. We thus propose that our method may be used to provide more refined maps than the overview maps in areas where more detailed geotechnical/geological data have been acquired. The efficiency of our algorithm suggests that it may replace any global visibility operators used in other applications or processing schemes of gridded map data. (C) 2014 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license

Place, publisher, year, edition, pages
2015. Vol. 75, 88-95 p.
Keyword [en]
landslide susceptibility, Sensitive clay, Visibility algorithm, GIS
National Category
Computer Science Earth and Related Environmental Sciences
URN: urn:nbn:se:uu:diva-246349DOI: 10.1016/j.cageo.2014.11.006ISI: 000348556700010OAI: oai:DiVA.org:uu-246349DiVA: diva2:794049
Available from: 2015-03-10 Created: 2015-03-05 Last updated: 2016-02-11Bibliographically approved

Open Access in DiVA

fulltext(3214 kB)75 downloads
File information
File name FULLTEXT01.pdfFile size 3214 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Search in DiVA

By author/editor
Tryggvason, Ari
By organisation
In the same journal
Computers & Geosciences
Computer ScienceEarth and Related Environmental Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 75 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 262 hits
ReferencesLink to record
Permanent link

Direct link