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Comparison of landslide susceptibility maps derived from press-based and aerial photograph interpretation inventories for Tegucigalpa, Honduras
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Applied Mechanics, Byggteknik. National Autonomous University of Honduras.ORCID iD: 0000-0003-4362-4510
Asian Insitute of Space Information.
(English)Manuscript (preprint) (Other academic)
Keyword [en]
landslide susceptibility index, matrix method, press archives, Tegucigalpa, urban landslides
National Category
Other Earth and Related Environmental Sciences
Research subject
Earth Science with specialization in Environmental Analysis
Identifiers
URN: urn:nbn:se:uu:diva-264500OAI: oai:DiVA.org:uu-264500DiVA: diva2:860744
Funder
Sida - Swedish International Development Cooperation Agency, 54100006
Available from: 2015-10-13 Created: 2015-10-13 Last updated: 2015-11-13
In thesis
1. The Use of Press Archives in the Temporal and Spatial Analysis of Rainfall-Induced Landslides in Tegucigalpa, Honduras, 1980-2005
Open this publication in new window or tab >>The Use of Press Archives in the Temporal and Spatial Analysis of Rainfall-Induced Landslides in Tegucigalpa, Honduras, 1980-2005
2015 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

The scarcity of data poses a challenging obstacle for the study of natural disasters, especially in developing countries where the social vulnerability plays as important a role as the physical vulnerability.  The work presented in this thesis is oriented towards the demonstration of the usefulness of press archives as a data source for the temporal and spatial analysis of landslides in Tegucigalpa, Honduras for the period between 1980 and 2005.  In the last four decades, Tegucigalpa has been characterized by a disorganized urban growth that has significantly contributed to the destabilization of the city’s slopes.  In the first part of the thesis, a description of the database compilation procedure is provided.  The limitations of using data derived from press archives have also been addressed to indicate how these affect the subsequent landslide analyses.  In the second part, the temporal richness offered by press archives has allowed the establishment of rainfall thresholds for landslide occurrence.  Through the use of the critical rainfall intensity method, the analysis of rainfall thresholds for 7, 15, 30 and 60 antecedent days shows that the number of yielded false alarms increases with the threshold duration.  A new method based on the rainfall frequency contour lines was proposed to improve the distinction between days with and without landslides.  This method also offers the possibility to identify the landslides that may only occur with a major contribution of anthropogenic disturbances as well as those landslides induced by high-magnitude rainfall events.  In the third part, the matrix method has been employed to construct two landslide susceptibility maps: one based on the multi-temporal press-based landslide inventory and a second one based on the landslide inventory derived from an aerial photograph interpretation carried out in 2014.  Despite the low spatial accuracy provided by the press archives in locating the landslides, both maps exhibit 69% of consistency in the susceptibility classes and a good agreement in the areas with the highest propensity to landslides.  Finally, the integration of these studies with major actions required to improve the process of landslide data collection is proposed to prepare Tegucigalpa for future landslides.  

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2015. 90 p.
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 1304
Keyword
press archives, landslide database, urban landslides, critical rainfall intensity, antecedent rainfall, rainfall frequency contour lines, matrix method, landslide susceptibility index, Tegucigalpa, Honduras, Hurricane Mitch
National Category
Other Earth and Related Environmental Sciences
Research subject
Earth Science with specialization in Environmental Analysis
Identifiers
urn:nbn:se:uu:diva-264645 (URN)978-91-554-9375-2 (ISBN)
Public defence
2015-12-03, Polhemssalen, Ångströmlaboratoriet, Lägerhyddsvägen 1, Uppsala, 10:15 (English)
Opponent
Supervisors
Funder
Sida - Swedish International Development Cooperation Agency, 54100006
Available from: 2015-11-12 Created: 2015-10-15 Last updated: 2015-11-13

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