Possible earthen dam failure mechanisms of Fujinuma reservoir due to the Great East Japan Earthquake of 2011
November 2nd, 2011
Keisuke Ono, So Kazama, Seiki Kawagoe, Yoshiyuki Yokoo and Luminda Gunawardhana
Release Date: November 2, 2011
Possible earthen dam failure mechanisms of Fujinuma reservoir due to the Great East Japan Earthquake of 2011
Keisuke Ono1), So Kazama1), Seiki Kawagoe2), Yoshiyuki Yokoo2) and Luminda Gunawardhana1)
1) Department of Civil Engineering, Tohoku University
2) Division of Environmental System Management, Faculty of Symbiotic Systems Science, Fukushima University
(Received: August 1, 2011)
(Accepted for publication: October 7, 2011)
Abstract:
A gigantic earthquake with a magnitude of 9.0, the maximum ever recorded in Japan, struck the Tohoku region of Japan on 11 March, 2011. As a result, as many as 745 reservoirs in Fukushima prefecture were damaged. The failure of the earth-fill dam at the Fujinuma reservoir in Fukushima prefecture resulted in eight deaths in a village downstream. This was only the second such dam to fail completely in the recorded history of Japan, the first being Mannou Lake dam. The failure was caused by the Ansei Nankai earthquake in 1854. According to official records, of the 210,000 reservoirs in Japan, at least 20,000 dams are vulnerable to future earthquakes. Therefore, it is imperative that the failure mechanism of the Fujinuma reservoir be understood. As such, we developed several theories to explain what happened. Adherence to recommendations made in this report will reduce the potential for damage in future catastrophic events.
To cite this article:
Keisuke Ono, So Kazama, Seiki Kawagoe, Yoshiyuki Yokoo and Luminda Gunawardhana: “Possible earthen dam failure mechanisms of Fujinuma reservoir due to the Great East Japan Earthquake of 2011”, Hydrological Research Letters, Vol. 5, pp.69-72, (2011) .
doi:10.3178/hrl.5.69
JOI JST.JSTAGE/hrl/5.69
Copyright (c) 2011 Japan Society of Hydrology and Water Resources