Geologic effects of hurricanes

Coch, Nicholas K.

doi:10.1016/0169-555x(94)90007-8

Cited by 27 publications

(11 citation statements)

References 5 publications

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“…Episodic extreme wave events, such as winter storm surges, tropical cyclones and tsunamis, may contribute to coastal changes by the deposition of washover sediments and boulder ridges, often associated with beach erosion and barrier breaching (Coch, 1994;Morton and Sallenger, 2003;Wang and Horwitz, 2007). Depending on the regarded time and spatial scale, these events represent major geomorphological changes of the coastal system (Paris et al, 2009).…”

Section: Introductionmentioning

confidence: 97%

The Lefkada barrier and beachrock system (NW Greece) — Controls on coastal evolution and the significance of extreme wave events

et al. 2012

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Section: Introductionmentioning

confidence: 97%

The Lefkada barrier and beachrock system (NW Greece) — Controls on coastal evolution and the significance of extreme wave events

et al. 2012

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“…Of interest here are the very high precipitation intensities that accompany the passage of a tropical cyclone, resulting from the strong convection that is associated with the development of the weather system. Intensities of 100ram per hour and 1000mm per day are not particularly uncommon, although precipitation totals of 600 mm per tropical cyclone are probably more normal (Coch 1994). The majority of the precipitation occurs in a period of approximately five to eight hours as the centre of the tropical cyclone passes.…”

Section: Climatic Environmentmentioning

confidence: 94%

“…The strong winds and storm surges may have a significant effect on the evolution of coastal landforms; sustained wind speeds of 85 m s r and storm surges of 13 m have been measured (Coch 1994). Of interest here are the very high precipitation intensities that accompany the passage of a tropical cyclone, resulting from the strong convection that is associated with the development of the weather system.…”

Section: Climatic Environmentmentioning

confidence: 98%

Uplift and landscape stability at Taroko, eastern Taiwan

Petley

Dorobek

1999

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The Taroko area of Taiwan represents an extremely dynamic environment, of rapid geological and geomorphological change. The location of the area on the collision zone between the continental Eurasian plate and the oceanic Philippine Sea plate leads to a high frequency of seismic activity, intense internal deformation and high rates of tectonic uplift. The rate of uplift, which is believed to be one of the highest measured, is approximately 5.5 mm per annum, with higher rates inferred for the last million years. In consequence, the area, which consists predominantly of relatively weak, intensely deformed marble and schist, has a high potential energy providing ideal conditions for rapid landform evolution.In addition to high rates of uplift, high rates of denudation are also favoured by the extreme climatic conditions. In particular, the area is seasonally affected by tropical cyclones (typhoons); an average of 16 of these occur in the northwest Pacific per annum, about three of which affect Taiwan. The passage of a typhoon is marked by heavy rainfall which may reach intensities of 100 mm per hour and 1500 mm in 24 hours. The high rainfall intensities generate intense fluvial activity, including extensive overland flow, high peak discharges, the mobilization of debris channels, landslides and rockfalls.Intense tectonic and geomorphological activity provide the ideal environment for studying the rapid evolution of landscapes. In this paper, uplift data are combined with daily hydrological records from a major river for the last fifteen years. The hydrological records, which include discharge, mean flow rates and sediment volumes, are used to estimate the sediment budget for the river and hence to estimate denudation rates. It is demonstrated that average aerial denudation rates approximately equal uplift rates. These data are then used to generate a simple computer model for the evolution of Taroko Gorge, which demonstrates that current landforms may be created without substantial changes in the rate of uplift.

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“…A cyclone is a high-energy atmosphere-ocean event, capable of modifying morphosedimentary equilibriums and displacing important volumes of sediment stocks quasi-instantaneously (Scoffin, 1993;Coch, 1994;Spiske and Jaffe, 2009). Cyclonic storm surges induce a rapid rise in sea level above the predicted tidal stage, caused by wind shear pushing coastal waters onshore and a decrease in atmospheric pressure.…”

Section: Geoarchaeology Of Palaeo-cyclones On Tromelinmentioning

confidence: 99%