Skip to Main Content
Rainfall-induced landslide susceptibility zonation of Puerto RicoAuthor(s): Chiara Lepore; Sameer A. Kamal; Peter Shanahan; Rafael L. Bras
Source: Environmental Earth Science. DOI 10.1007/s12665-011-0976-1
Publication Series: Scientific Journal (JRNL)
Station: International Institute of Tropical Forestry
View PDF (943.06 KB)
DescriptionLandslides are a major geologic hazard with estimated tens of deaths and $1–2 billion in economic losses per year in the US alone. The island of Puerto Rico experiences one or two large events per year, often triggered in steeply sloped areas by prolonged and heavy rainfall. Identifying areas susceptible to landslides thus has great potential value for Puerto Rico and would allow better management of its territory. Landslide susceptibility zonation (LSZ) procedures identify areas prone to failure based on the characteristics of past events. LSZs are here developed based on two widely applied methodologies: bivariate frequency ratio (FR method) and logistic regression (LR method). With these methodologies, the correlations among eight possible landslide-inducing factors over the island have been investigated in detail. Both methodologies indicate aspect, slope, elevation, geological discontinuities, and geology as highly significant landslide-inducing factors, together with land-cover for the FR method and distance from road for the LR method. The LR method is grounded in rigorous statistical testing and model building but did not improve results over the simpler FR method. Accordingly, the FR method has been selected to generate a landslide susceptibility map for Puerto Rico. The landslide susceptibility predictions were tested against previous landslide analyses and other landslide inventories. This independent evaluation demonstrated that the two methods are consistent with landslide susceptibility zonation from those earlier studies and showed this analysis to have resulted in a robust and verifiable landslide susceptibility zonation map for the whole island of Puerto Rico.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationLepore, Chiara; Kamal, Sameer A.; Shanahan, Peter; Bras, Rafael L. 2011. Rainfall-induced landslide susceptibility zonation of Puerto Rico. Environmental Earth Science. DOI 10.1007/s12665-011-0976-1
KeywordsLandslides, Landslide susceptibility, Rainfall-induced landsliding, Frequency ratio, Logistic regression, GIS, Susceptibility maps, Puerto Rico
- The frequency and distribution of recent landslides in three montane tropical regions of Puerto Rico
- Spatially explicit shallow landslide susceptibility mapping over large areas
- Delineation of preventative landslide buffers along steep streamside slopes in northern California
XML: View XML