自然への意識を喚起する河川空間デザイン　

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本稿は，筆者が関わった 2 つの事例，災害復旧事業として，観光地における分水路整備と，治水事業として，都市内の河川改修事業を紹介する。それらの事例は，日本の河川行政における制度改正の好影響を受けた事例である。前者は自然な形状に岩盤を掘削し，後者は豊かで貴重な緑を保全し，歴史的な技法で石積みを再生した。それらは共に，治水と景観の両立を図るだけではなく，自然への介入が大きい土木事業を積極的に活用し，自然と人間との新しい関係（出会い）を促すことに成功している。また，協働という観点からは，住民だけではなく，施工者も巻き込み，プロセス全体において，多様な主体と協働することの価値を示している。

Major public works to combat disasters are very often designed from a strictly technical point of view radically transforming landscapes in response to a maximum level of risk without consideration for their potential social value and their importance in the socialisation of the local populations they are intended to protect. This article puts forward the hypothesis that a landscape approach makes it possible to design alternative developments addressing more complex issues than purely technical questions. At a time in the Anthropocene era when humanity's impact on terrestrial ecosystems has become the driving force behind environmental change, it is important that development projects proposed by public authorities should be used as a support for (re)building new relationships between environments and society. This implies nurturing a crucial sensitivity towards nature and an awareness of "what is sustainable". To do this, the landscape architect must shift the theoretical foundations of his or her approach by putting forward the notion of the "aesthetics of engagement" as opposed to the "aesthetics of detachment". Two projects the author participated in as a landscape architect, and which were intended to combat flooding on the island of Kyūshū in Japan, serve as starting points in this reflection.