Extreme Precipitation Estimation with Typhoon Morakot Using Frequency and Spatial Analysis

Chu, Hsin; Pan, Tung Ming; Liou, Jyh‐Ming

doi:10.3319/tao.2011.05.10.02(tm)

Cited by 20 publications

(16 citation statements)

References 19 publications

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“…Relatively heavy rainfall occurs especially in the mountain areas. The rainfall is less along the coastal areas and plains (Chu et al 2011).…”

Section: Field Descriptionmentioning

confidence: 99%

Extreme Bed Changes in the Gaoping River Under Climate Change

Chao¹,

Li²,

Liou³

et al. 2016

Terr. Atmos. Ocean. Sci.

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Extreme typhoon events have been increasing due to climate change. In recent years, severe landslides, flooding, and extreme sediment transport have become more easily induced by these events. This study employs dynamic downscaling climate projection data to evaluate riverbed changes and sediment transport processes of the Gaoping River, located in southern Taiwan, under the worst late 20 th century conditions and projections for the late 21 st century. Results show that the peak runoff discharge in the late 21 st century could be 1.48 times larger than that in the late 20 th century. This data indicates that the risk potential for overbank and pier scour disasters will increase in the future. However, in contrast to the late 20 th century, the thalweg sediment aggradation model indicated 19% less in the late 21 st century. An experimental design method was applied to further explore the reasons behind this outKome. It was found that severe riverbed changes correlated negatively with the peak discharge in extreme floods. These findings will greatly assist in understanding riverbed change processes under extreme typhoon events using dynamic downscaling climate change data.

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“…Relatively heavy rainfall occurs especially in the mountain areas. The rainfall is less along the coastal areas and plains (Chu et al 2011).…”

Section: Field Descriptionmentioning

confidence: 99%

Extreme Bed Changes in the Gaoping River Under Climate Change

Chao¹,

Li²,

Liou³

et al. 2016

Terr. Atmos. Ocean. Sci.

Self Cite

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“…Morakot Typhoon struck Taiwan from 7-9 August 2009 with abundant rainfall, reaching 2,777mm, and surpassing the historical record of Typhoon Herb, which had brought rainfall of 1,736mm ( [1]; [2]). The extremely heavy rainfall triggered severe flooding (the worst in the past 50 years) and enormous mudslides throughout southern Taiwan, leading to around 700 deaths and roughly NT$110 billion in property damage ( [3]). …”

Section: Introductionmentioning

confidence: 99%

Statistical Modelling of Recent Changes in Extreme Rainfall in Taiwan

Chu¹,

McAleer²,

Wang³

2013

IJESD

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Abstract-This paper has two primary purposes. First, we fit the annual maximum daily rainfall data for 6 rainfall stations, both with stationary and non-stationary generalized extreme value (GEV) distributions for the periods 1911-2010 and 1960-2010 in Taiwan, and detect changes between the two phases for extreme rainfall. The non-stationary model means that the location parameter in the GEV distribution is a linear function of time to detect temporal trends in maximum rainfall. Second, we compute the future behavior of stationary models for the return levels of 10, 20, 50 and 100-years based on the period 1960-2010. In addition, the 95% confidence intervals of the return levels are provided. This is the first investigation to use generalized extreme value distributions to model extreme rainfall in Taiwan.

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“…Typhoon Morakot was a high-intensity typhoon -the strongest typhoon to hit Taiwan in the last 50 years, and triggered widespread landslides and debris flows in southern Taiwan (Chu et al 2011;Lin et al 2011), especially around AG3 and AG6. Short-term atmosphere-induced gravity changes, such as those due to typhoons, can only be predicted well with high-frequency atmospheric data (Petrov and Boy 2004;Chou et al 2011).…”

Section: Typhoon Morakot-induced Large Gravity Changes Associated Witmentioning

confidence: 99%

Absolute gravity change in Taiwan: Present result of geodynamic process investigation

Kao¹,

Hwang²,

Kim³

et al. 2017

Terr. Atmos. Ocean. Sci.

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Gravity values at 24 sites over 2004 -2016 measured with absolute gravimeters are used to study geodynamic processes in Taiwan. We model rain-induced gravity effects and other temporal effects of non-geodynamic origins to obtain residual gravity, which cannot be fully explained by GPS-derived vertical displacements. We explain the gravity changes associated with deposited debris, earthquake, volcanism and Moho deepening. Gravity changes of 53.37 and 23.38 μGal near Sinwulyu and Laonong Rivers are caused by typhoon Morakot, leading to estimated volumes of 6.0 × 10 5 and 3.6 × 10 5 m 3 in deposited debris. The observed co-seismic gravity change near the epicenter of the M 6.9 Pingtung earthquake (26 December 2006) is 3.12 ± 0.99 μGal, consistent with a dislocation-based gravity change at the μGal level, thereby supplying a gravity constraint on the modeled fault parameters. The AG record at the Tatun Volcano Group is the longest, but large temporal gravity effects here has led to a current gravity signal-to-noise ratio of less than one, which cannot convince a sinking magma chamber, but supply an error bound for gravity detections of long-term or transient magma movements. The gravity values at Ludao and Lanyu decline steadily at the rates of -2.20 and -0.50 μGal yr -1 , consistent with the expected magma states of the two extinct volcanoes. The gravity rates at an uplifting site in central Taiwan and three subsiding sites in eastern Taiwan are negative, and are potentially caused by Moho deepening at a rate of -3.34 cm yr -1 and a combined Moho deepening and plate subduction at the rates of -0.18, -2.03, and -1.34 cm yr -1 . Article history:Received 10

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Extreme Precipitation Estimation with Typhoon Morakot Using Frequency and Spatial Analysis

Cited by 20 publications

References 19 publications

Extreme Bed Changes in the Gaoping River Under Climate Change

Extreme Bed Changes in the Gaoping River Under Climate Change

Statistical Modelling of Recent Changes in Extreme Rainfall in Taiwan

Absolute gravity change in Taiwan: Present result of geodynamic process investigation

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