A synthesis of the geologic evolution of Taiwan

Ho, Cheng-Seen

doi:10.1016/0040-1951(86)90004-1

Cited by 453 publications

(393 citation statements)

References 7 publications

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“…During the Pliocene, the Pakuashan-Tatushan area probably changed progressively from a dominating postrift subsidence setting to a mainly flexural subsidence-controlled setting. The related sedimentation evolved from shelf to fluvial environments, consistent with the emersion of this area in response to the increasing influence of the propagating collision [Ho, 1986;Teng, 1990].…”

Section: Insights From Subsurface Datasupporting

confidence: 67%

Quaternary transfer faulting and belt front deformation at Pakuashan (western Taiwan)

Mouthereau¹,

Lacombe²,

Deffontaines³

et al. 1999

Tectonics

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Section: Insights From Subsurface Datasupporting

confidence: 67%

Quaternary transfer faulting and belt front deformation at Pakuashan (western Taiwan)

Mouthereau¹,

Lacombe²,

Deffontaines³

et al. 1999

Tectonics

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“…The subduction of the Philippine Sea plate beneath the Eurasian Continental plate has resulted in the formation of an active mountain belt with over 200 peaks higher than 3000 m a.s.l. (Ho 1986;Teng 1990) and is responsible for frequent large earthquakes and an orogenic uplift rate of about 5-7 mm/year (Li 1976;Willett et al 2003). The geological map provided by the Central Geological Survey of Taiwan (Ho 1988) illustrates the seven major geological zones of Taiwan (Fig.…”

Section: Study Areamentioning

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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“…The fault has long been known to be an oblique-slip fault, with significant component of vertical movement (e.g., Hsu, 1962;Ho, 1986Ho, , 1988Chen, 1988 This is exactly coincident with surface ruptures of 1951. Along this reach, the fault has been rapidly creeping for at least 20 years (e.g., Yu and Liu, 1989;Angelier et al, 1997;Chow et al, 2001;Lee et al, 2001).…”

Section: The Chihshang Rupturementioning

confidence: 99%