Host: Japan Society of Hydrology and Water Resources
A massive flood, the maximum ever recorded in Thailand, struck the Chao Phraya River in 2011. We had a questionnaire investigation for citizen in Chao Phraya River basin from 4th to 9th in 2011 which consisted of two question types, first was the damage situation and disaster response, second was the civil understanding for the flood disaster. We got 142 subjects. We show the relations between the damage situation and response, and the understanding for main cause of this flood and past floods in Thailand.