This paper aims to reveal effects of disaster structural understanding on Residents' behavioral intention under disaster developing process. In recent studies, some research which are based on Behavioral Intention Model (Fishbein & Ajzen, 1975; Ajzen, 1991) pointed out disaster evacuation that people fail to evacuate rapidly by their own decision without behavioral intention.
People need an ability which anticipate an event to occur one after the other along disaster developing process to increase behavioral intention. If people try to take this ability, they shouldn't have fragmented understanding but Structural understanding to make sure whole disaster developing process. But, former studies haven't revealed effects of disaster structural understanding on Residents' behavioral intention yet.
The author surveyed residents' disaster structural understanding about river flood and their actions against disaster in Kinugawa river flood caused by Kanto-Tohoku Heavy Rainfall disaster (2015) by a questionnaire survey for three hundred internet monitors in seven towns as bellows; Jyousou, Yuuki, Shimotsuma, Moriya, Chikusei, Tsukubamirai and Yachiyo. All towns are riverside of the Kinugawa River and were at risk of Kanto-Tohoku Heavy Rainfall disaster. After surveyed, the author categorized respondents for three groups corresponding to their disaster structural understanding as high-level, middle-level and low-level.
The results show that high-level and middle-level groups get some disaster information earlier than low-level group. The earliness of increasing behavioral intention is similar to the earliness of getting some disaster information, high-level and middle-level groups increase behavioral intention earlier than low-level group.
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