Embankment Material Characteristic of Around Damaged Small Earth Dam for Irrigation on the 1983 Middle Japan Sea Earthquake in Aomori Prefecture

The damage factor of small earth dam for irrigation on the 1983 Middle Japan Sea Earthquake in Aomori prefecture was revalidated by the geographical information system (GIS) using the damage situation of small earth dam for irrigation at that time, the assumed seismic intensity distribution map, the topography and geotechnical condition of surrounding area, the embankment material, the foundation ground material and the small earth dam for irrigation ledger, etc. As a result, the damage factor of small earth dam for irrigation on the 1983 Middle Japan Sea Earthquake is considered to be attribute to the constituent materials of embankment and foundation ground. Especially, the damage occurrence rate of small earth dam for irrigation with sandy soil materials is high, and it is due to the influence of liquefaction in sandy soil materials.