Information sharing concerning warning of, and evacuation plans from, sediment]related
disasters
Miki CHIBA, Yuji KATAYAMA, Youichi MIKI and Kazuyuki TAKANASHI
Abstract
On July 19, 2006, several sediment]related disasters (debris flows and landslides)
occurred in Okaya and Suwa, in Nagano Prefecture, Japan. In Okaya, no evavuation
took place before the disaster, and two debris flows killed eight people. Nearby
Suwa was evacuated voluntarily, before the debris flow struck. In Okaya, a debris
flow struck a retirement home. The first floor residents were evacuated to the
second floor. Neither the Okaya City Government nor the residents had thought
beforehand that a debris flow disaster could occur and, therefore, had not prepared
for it.