Please use this identifier to cite or link to this item:
https://hdl.handle.net/1959.11/22353
Title: | Deriving the rainfall threshold for shallow landslide early warning during tropical cyclones: a case study in northern Philippines | Contributor(s): | Javier, Dymphna (author); Kumar, Lalit (author) | Publication Date: | 2018 | DOI: | 10.1007/s11069-017-3081-2 | Handle Link: | https://hdl.handle.net/1959.11/22353 | Abstract: | Rainfall-induced landslides (RILs) have been a source of social and economic disruption in the mountainous Baguio area in northern Philippines. Prolonged heavy rainfall usually happens during tropical cyclone and southwest monsoon activity. A pragmatic approach to RIL mitigation is to develop rainfall-based early warning. We implemented a modified regression method to derive the empirical minimum intensity (I)– duration (D) threshold I = 6.46 D-0.28 and a normalized ID threshold NI = 0.002 D-0.28 for rainfall duration ranging between 24 and 264 h. Using a separate data set to evaluate the applicability of the threshold, 93% of the landslide-triggering rainfall events fell above the derived threshold. RILs also occurred when 24-h rainfall was 0.02–28% of the mean annual precipitation or after accumulating at least 500 mm of rainfall from the onset of the rainy season. The thresholds may be further refined as more landslide data become available in the future. | Publication Type: | Journal Article | Source of Publication: | Natural Hazards, 90(2), p. 921-941 | Publisher: | Springer Netherlands | Place of Publication: | Netherlands | ISSN: | 1573-0840 0921-030X |
Fields of Research (FoR) 2008: | 090702 Environmental Engineering Modelling 090903 Geospatial Information Systems 090905 Photogrammetry and Remote Sensing |
Fields of Research (FoR) 2020: | 401304 Photogrammetry and remote sensing 401102 Environmentally sustainable engineering 401302 Geospatial information systems and geospatial data modelling |
Socio-Economic Objective (SEO) 2008: | 961008 Natural Hazards in Mountain and High Country Environments 961010 Natural Hazards in Urban and Industrial Environments |
Socio-Economic Objective (SEO) 2020: | 190405 Meteorological hazards (e.g. cyclones and storms) | Peer Reviewed: | Yes | HERDC Category Description: | C1 Refereed Article in a Scholarly Journal |
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Appears in Collections: | Journal Article School of Environmental and Rural Science |
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