[H-DS08] Natural hazards impacts on the society, economics and technological systems

[HDS08-09] Comparison of public awareness for river environment between Japan and Thailand.

*松島 肇¹、Aruninta Ariya²、Phukumchai Pachara²、田中 俊逸³、五十嵐 敏文⁴、林 律人⁴、波多野 隆介¹、根岸 淳二郎³、大竹 翼⁴、武田 量⁴、Bower John⁵、井上 京¹、池辺 将之⁶ (1.北海道大学大学院農学研究院、2.チュラロンコン大学建築学部、3.北海道大学大学院地球環境科学研究院、4.北海道大学大学院工学研究院、5.北海道大学大学院水産科学研究院、6.北海道大学大学院情報科学研究科)

キーワード：石狩川、チャオプラヤ川、河川環境、住民意識

Increasing of recent extreme events caused by climate change is an urgent environmental issue in the world. Especially for the vulnerability of rivers and riverine ecosystems in Asia is now threatened by not only the natural hazards, but also human activities. This study surveyed the public awareness of riverside residents about river environments along Ishikari river in Japan and Chaophraya river in Thailand to consider the countermeasures to establish the resilient river environment and community. The questionnaire surveys were conducted in both watershed from upstream to downstream in January 2017 for Ishikari riverside residents(IR) and September 2017 for Chaophraya riverside residents(CR), and 152 respondents in IR and 92 respondents in CR took part in this survey. The results showed that the CR felt the river environments getting worse, especially in downstream. They felt the amount of garbage had increased and also water quality got worse because of human activities, e.g. wastewater from households and factories, and pesticides and fertilizers in farmland. While IR believed that the cause of decreasing riparian life was loss of their habitat by constructions, CR believed that degradation of river water quality. The expected roles for the river were divers in CR, and they thought the necessity to have more environmental educations and water conservation activities to improve the river water quality.