A Rainfall Intensity-Duration Threshold for Landslides in a Humid-Tropical Environment, Puerto Rico

Larsen, Matthew C.; Simon, Andrew

doi:10.2307/521049

Cited by 214 publications

(137 citation statements)

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“…Similarly, after the passage of Hurricanes Paul (1982) and Isis (1998), both with large effects in the alluvial reaches of all streams originated in the SLL (e.g., Bonillas, 1984), no slope failures were observed in both Landsat imagery and the few available aerial photographs. The threshold curve derived from the intensity and duration data for these storms, along with Juliette, is strikingly similar not only to curves estimated in wet tropical forest areas affected by TCs (Larsen and Simon, 1993) but also to curves developed for semiarid regions affected by warm-season convective systems (e.g., Webb et al, 2008). Juliette brought more intense rainfall to Baja California than any other storm in record.…”

Section: Threshold Of Slope Failurementioning

confidence: 69%

“…Widespread flooding, bank erosion and alluvial deposition are dominant processes in lowlands (Gupta, 1988;Kostachuk et al, 2001;Martínez-Gutiérrez and Mayer, 2004;Milliman and Kao, 2005) while landslides are predominant in mountainous terrain (Larsen and Simon, 1993;Page et al, 1999;Hovius et al, 2000;Crone et al, 2001;Bucknam et al, 2001;Lin et al, 2004;Alcántara-Ayala, 2004;Turton, 2008;Larsen, 2008). All types of mass wasting events can occur during the passage of these storms.…”

Section: Introductionmentioning

confidence: 99%

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Occurrence of landslides during the approach of tropical cyclone Juliette (2001) to Baja California Sur, Mexico

Antinao¹,

Farfán²

2013

Atmósfera

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El acercamiento del ciclón tropical Juliette en 2001 a la península de Baja California provocó por lo menos 419 deslizamientos. Éstos corresponden en su mayoría a derrumbes someros de extensión reducida que fueron convertidos rápidamente en flujos de detritos para ser exportados de las áreas montañosas hacia áreas bajas. Los factores principales que afectan la ocurrencia de deslizamientos en esta zona son la precipitación total y su intensidad, así como la orientación, la geología y la vegetación. Se pueden distinguir dos procesos como iniciadores de los derrumbes. El primero de ellos es la acumulación de escorrentía por precipitación intensa sobre rocas expuestas, lo cual genera exceso de escurrimiento superficial que acarrea regolito. Éste es el proceso principal en topografía cóncava. La combinación de viento y de exceso de escurrimiento en las pendientes altas convexas o planas constituye un proceso secundario relacionado con la heterogeneidad de las asociaciones de vegetación en el límite entre los bosques tropical seco y de roble. Los árboles arrancados desprendieron bloques completos de regolito y roca, lo cual preparó las laderas para la concentración adicional de escurrimiento superficial. Se ha estimado una curva para el umbral de deslizamientos en esta región. Asimismo, con base en el análisis de la información histórica, se ha determinado que tormentas como Juliette se acercan al sur de la península en promedio una vez cada 100 años. Las estimaciones de la denudación provocada directamente por deslizamientos se ubican en la parte más alta del espectro para un margen tectónico pasivo. Estas estimaciones deben considerarse en la toma de decisiones vinculadas con el manejo de los recursos hídricos en esta región. Los resultados acentúan la necesidad de contar con una representación más detallada de la distribución espacial de la precipitación y vientos para esta región montañosa afectada por ciclones tropicales. ABSTRACTThe approach of tropical cyclone (TC) Juliette, in 2001, to the Baja California Peninsula triggered at least 419 landslides. Most of the landslides were shallow slips and debris slides of limited areal extent, which were converted rapidly into debris flows to be exported quickly out of the mountain areas towards the lowlands. Main factors affecting landslide occurrence were total storm rainfall and intensity, aspect, geology and vegetation association. Two processes can be distinguished as initiating slope failure. Accumulation of rainfall from exposed bedrock slopes, generating excess overland flow, was the main process linked to failures in 184 J. L. Antinao and L. M. Farfán concave topography. A combination of wind and excess overland flow in the more convex or planar upper slopes was a secondary process related to heterogeneity of vegetation associations in the oak-dry tropical forests ecotone, as uprooted trees dislodged large regolith and bedrock blocks, priming hillslopes for further runoff concentration. An estimative threshold curve for triggering landslides in this region is sk...

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Section: Threshold Of Slope Failurementioning

confidence: 69%

Section: Introductionmentioning

confidence: 99%

Occurrence of landslides during the approach of tropical cyclone Juliette (2001) to Baja California Sur, Mexico

Antinao¹,

Farfán²

2013

Atmósfera

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“…In early years, the lower rainfall boundary (threshold) was determined manually (e.g., Caine 1980;Larsen and Simon 1993;Chien-Yuan et al 2005). However, more recently, mathematical and/or statistical criteria have been used to objectively determine the lower boundary.…”

Section: I-d Thresholdsmentioning

confidence: 99%

Rainfall intensity–duration conditions for mass movements in Taiwan

Chen

Saitô

Oguchi

2015

Prog. in Earth and Planet. Sci.

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Mass movements caused by rainfall events in Taiwan are analyzed during a 7-year period from 2006 to 2012. Data from the Taiwan Soil and Water Conservation Bureau reports were compiled for 263 mass movement events, including 156 landslides, 91 debris flows, and 16 events with both landslides and debris flows. Rainfall totals for each site location were obtained from interpolated rain gauge data. The rainfall intensity-duration (I-D) relationship was examined to establish a rainfall threshold for mass movements using random sampling: I = 18.10(±2.67)D −0.17(±0.04) , where I is mean rainfall intensity (mm/h) and D is the time (h) between the beginning of a rainfall event and the resulting mass movement. Significant differences were found between rainfall intensities and thresholds for landslides and debris flows. For short-duration rainfall events, higher mean rainfall intensities were required to trigger debris flows. In contrast, for long-duration rainfall events, similar mean rainfall intensities triggered both landslides and debris flows. Mean rainfall intensity was rescaled by mean annual precipitation (MAP) to define a new threshold: I MAP = 0.0060(±0.0009)D −0.17(±0.04) , where I MAP is rescaled rainfall intensity and MAP is the minimum for mountainous areas in Taiwan (3000 mm). Although the I-D threshold for Taiwan is high, the I MAP -D threshold for Taiwan tends to be low relative to other areas around the world. Our results indicate that Taiwan is highly prone to rainfall-induced mass movements. This study also shows that most mass movements occur in high rainfall-intensity periods, but some events occur before or after the rainfall peak. Both antecedent and peak rainfall play important roles in triggering landslides, whereas debris flow occurrence is more related to peak rainfall than antecedent rainfall.

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“…In practice, landslide occurrence has been related empirically to rainfall intensity-duration statistics from rain gauge information for specific regions [Larsen and Simon, 1993;Godt et al, 2006] and on a quasi-global basis [Caine, 1980]. The recent develop ment of high time resolution, multisatellite precipitation analyses has provided the potential of detecting heavy rain events associated with landslides in tropical and temperate latitudes without regard for the availability of rain gauges, an issue that frequently limits the application of the pre vious studies.…”

Section: Rainfall and Landslidesmentioning

confidence: 99%

Satellite remote sensing for global landslide monitoring

Hong¹,

Adler²,

Huffman³

2007

EoS Transactions

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Rain‐induced landslides rank among the most devastating natural disasters. Nearly every year worldwide they cause billions of dollars in property damage and thousands of deaths. Society has dealt with landslide hazards primarily by trying to locate development away from known hazard zones, but such an approach has limitations. Overpopulation and associated sprawl into hazardous areas, plus environmental impacts such as deforestation and mining, increasingly put large numbers of people at risk from landslides. Yet most developing countries, particularly those in high‐risk areas of the tropics, lack the data infrastructure and analysis capabilities required to minimize injuries and deaths due to landslides. The challenges facing the science community include better understanding the surface and meteorological processes that lead to landslides and determining how new technology and techniques might be applied to reduce the risk of landslides to people across the globe.

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A Rainfall Intensity-Duration Threshold for Landslides in a Humid-Tropical Environment, Puerto Rico

Cited by 214 publications

References 12 publications

Occurrence of landslides during the approach of tropical cyclone Juliette (2001) to Baja California Sur, Mexico

Occurrence of landslides during the approach of tropical cyclone Juliette (2001) to Baja California Sur, Mexico

Rainfall intensity–duration conditions for mass movements in Taiwan

Satellite remote sensing for global landslide monitoring

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