Damages of embankment dams for irrigation due to the Mid Niigata Prefecture [Japan] Earthquake in 2004
2006
Kohgo, Y.(National Inst. for Rural Engineering, Tsukuba, Ibaraki (Japan))
Five irrigation fill dams, which were subjected light damages due to the Mid Niigata Prefecture Earthquake in 2004, were investigated. These dams were located within 20 km from the epicenters of the earthquakes whose magnitudes were greater than 6.0. Kawanishi dam, which was the highest among those: the height H=43m, was the most damaged. The situations of the damages are seen in photos 1 to 6. The damages seen commonly in these five dams were (1) Transverse cracks on the crests of embankments, (2) Settlements of embankments, and (3) Slides and bulging out of concrete brocks on the upstream slopes.
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