地震災害と都市地質学

概要

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The urban geology of Japan has been developing since early 1960's to solve the various environmental problems occurred in the urban areas. The earthquake disaster appeared in the 1964 Niigata earthquake was one of the early examples of the urban geology. The Niigata earthquake with a magnitude 7.5 on the Richter scale occurred 60 km north of Niigata on June 16, 1964. Among the remarkable episodes, the liquefaction of ground which appeared in a loose sedirentary pile of the Holocene age in and around Niigata City recieved strong attention to find the mitigation of the earthquake hazards. The damages by the liquefaction were ona large scale especially in the newly formed deposit along the river areas and reclaimed land within past about 300 years. The earthquake disasters in the urban areas should be studied from the viewpoint of the interaction between the responce of the ground such as liquefaction and human activities. The role of the urban geology in the earthquake disasters should be the prediction of the hazardous are as and the proposal of anti-disaster plans fitting well to geological conditions of the urban area.
日本地質学会の論文
1983-12-25