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Breaching of Changkai Levee in June 2010 in Jiangxi Province, China
A heavy storm caused catastrophic floods in the summer of 2010 throughout southern China. Fu River, the second largest river in Jiangxi Province, with a length of 312 km and a drainage area of 15,800 km2, experienced a 50-year return flood. A 347 m long segment of levee, Changkai Levee, breached on the evening of 21 June 2010 and 65,000 out of 100,000 residents in four towns were besieged by the breaching inflow. The breach was later blocked in 58 hours. This paper first introduces the process of the levee breach and studies the associated failure mechanisms. The main reasons for the failure are the low design standard (i.e. the design criterion is 20-year return flood while the actual flood reached the 50-year return level), erodible sandy soil conditions in the levee, and the scour of levee by the rapid water flow nearly vertical to the levee. Subsequently the procedures of rescuing the residents and blocking the breach are described. Finally why so many residents were besieged but no casualty was caused is explained.
Breaching of Changkai Levee in June 2010 in Jiangxi Province, China
A heavy storm caused catastrophic floods in the summer of 2010 throughout southern China. Fu River, the second largest river in Jiangxi Province, with a length of 312 km and a drainage area of 15,800 km2, experienced a 50-year return flood. A 347 m long segment of levee, Changkai Levee, breached on the evening of 21 June 2010 and 65,000 out of 100,000 residents in four towns were besieged by the breaching inflow. The breach was later blocked in 58 hours. This paper first introduces the process of the levee breach and studies the associated failure mechanisms. The main reasons for the failure are the low design standard (i.e. the design criterion is 20-year return flood while the actual flood reached the 50-year return level), erodible sandy soil conditions in the levee, and the scour of levee by the rapid water flow nearly vertical to the levee. Subsequently the procedures of rescuing the residents and blocking the breach are described. Finally why so many residents were besieged but no casualty was caused is explained.
Breaching of Changkai Levee in June 2010 in Jiangxi Province, China
Peng, M. (author) / Zhang, L. M. (author)
Georisk 2011 ; 2011 ; Atlanta, Georgia, United States
GeoRisk 2011 ; 476-483
2011-06-21
Conference paper
Electronic Resource
English
Breaching of Changkai Levee in June 2010 in Jiangxi Province, China
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