NDLI: Measurements and prediction of typhoon-induced short-term general scours in intermittent rivers

Content Provider	Springer Nature Link
Author	Su, Chih Chiang Lu, Jau Yau
Copyright Year	2012
Abstract	Most rivers in Taiwan are intermittent rivers. A short-term general scour usually occurs in the river during the rising limb of a flood due to the transitory sediment imbalance and the steep slope gradient. In this study, a severe maximum general scour depth of 4.5 m was measured near the Highway Bridge hydrological station in a gravel-bed reach of the lower Dajia River, which was caused by a flood induced by Typhoon Sinlaku in 2008. This type of short-term general scour is usually very significant and cannot be neglected as it has caused many casualties in Taiwan such as bridge and embankment failures, for example, the Houfeng Bridge failure in the lower Dajia River (Hong et al. in J Hydraul Eng ASCE 138(2):186–199, 2012) and the Shuangyuan Bridge failure in the lower Gaoping River. Based on the collected field data, a general scour formula was developed and gave reasonable predictions. In conjunction with the real-time ultrasonic water level measurements, the formula can be used as a potential tool for the emergency evacuation or bridge closure purposes.
Starting Page	671
Ending Page	687
Page Count	17
File Format	PDF
ISSN	0921030X
Journal	Natural Hazards
Volume Number	66
Issue Number	2
e-ISSN	15730840
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-12-06
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Short-term general scour Scoured flow depth Scour and fill Gravel bed Sand bed Intermittent river Embankment failure Bridge failure Typhoon-induced flood Natural Hazards Hydrogeology Geophysics/Geodesy Geotechnical Engineering & Applied Earth Sciences Civil Engineering Environmental Management
Content Type	Text
Resource Type	Article
Subject	Atmospheric Science Water Science and Technology

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