Article Dans Une Revue Géomorphologie : relief, processus, environnement Année : 2024

Landscape mutations in the Northern Kyushu region (Japan) induced by the torrential rains of July 2017 and associated restoration projects

Résumé

Every year, between May and October, Japan experiences a combination of gravity-driven and hydrological hazards triggered by the summer rain and typhoons. Despite developing a management and protection system, this still results in material damage and human casualties. The torrential rains of July 5-6, 2017, which triggered numerous landslides and torrential floods in the mountainous northern Kyushu region, are a case in point. In response to the severe disruptions induced in watersheds, such as Akatani, the state is deploying emergency restoration projects based on a wide range of civil engineering structures. For several decades, watersheds have been experiencing depopulation and an aging population, gradually impacting rural practices and the landscape. The July 2017 disaster and the associated restoration projects accelerate the mutation of these territories. This contribution seeks to demonstrate these transformations through the study of the main constituent elements of low mountain rural spaces. Using government data, satellite images and annual field monitoring since 2022, we can assess the changes brought about by the disaster and restoration on the hydrographic network, settlements and agricultural parcels. As a result, the space left to hamlets is shrinking in favor of the hydrographic network and protective structures, while agricultural land parcels are being consolidated, increasing the size of plots and simplifying their shape

Dates et versions

hal-05246769 , version 1 (09-09-2025)

Identifiants

Citer

Mélody Dumont, Vincent Siccard, Gilles Arnaud-Fassetta, Christopher Gomez, Candide Lissak, et al.. Landscape mutations in the Northern Kyushu region (Japan) induced by the torrential rains of July 2017 and associated restoration projects. Géomorphologie : relief, processus, environnement, 2024, 30 (4), ⟨10.4000/13tov⟩. ⟨hal-05246769⟩
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