日本地球惑星科学連合2019年大会

講演情報

[E] ポスター発表

セッション記号 H (地球人間圏科学) » H-DS 防災地球科学

[H-DS10] Natural hazards impacts on human society, economics and technological systems

2019年5月29日(水) 10:45 〜 12:15 ポスター会場 (幕張メッセ国際展示場 8ホール)

コンビーナ:PETROVA ELENA(Lomonosov Moscow State University, Faculty of Geography)、松島 肇(北海道大学大学院農学研究院)

[HDS10-P09] Design for Green Infrastructure: Analysis of Landscape change in the Kumamoto earthquake area

★Invited Papers

*藤田 直子1 (1.九州大学)

キーワード:グリーンインフラ、熊本地震、デザイン

The concept of “Green Infrastructure” and “Eco-DRR” is developed in Europe and North America lately, and it started to spread around in Japan after the Tohoku earthquake and tsunami in 2011. Landscape ecology is parallel with this conceptually, as well as in terms of spatial scale. Its successful focused researches and social implementation are becoming pervasive.

The new concept is to solve various problems by local resources and pearls of wisdom, it connects local communities to the world while it’s mainly led by front liners and researchers in engineering and ecological fields that little attention is paid to the aspects of arts and designs. It’s still not well-penetrated despite the validity and functions of the concept are well verified. Thus, it’s vitally important to work on the insufficient.



The purpose of this research is to analyze the reconstruction plan prepared by the affected municipalities of the Kumamoto earthquake and compare the landscape change read from the plan and the actual landscape change actually occurred and make clear how the cities and nature have changed during the reconstruction process.



In this research, we firstly gathered and analyzed the earthquake reconstruction plans created by each local government for all 45 municipalities in Kumamoto prefecture. In this analysis, while studying each municipal original plan, we primarily focused on the background, features, and landscape references of the plan formulation. During this analysis, we grasped the relations between the reconstruction plan and the landscape change, and also clarified what exactly each local government emphasizes independently. As the next step, basing on the field survey, we analyzed the actual state of the landscape changes described in the plan. As a method, we took the photographs at places where the plans adopted by each municipality in Kumamoto prefecture were scheduled or executed, and after recording the current situation and the surrounding landscape, we made a comparison with the photographs taken at the same place in the past. By doing this, we revealed what kind of changes have occurred between the past and the present due to the disaster, and how they affected the surrounding landscape.



Among the 45 municipalities in downtown Kumamoto Prefecture, we found that earthquake reconstruction plan was formulated in 16 municipalities, and 5 municipalities planned to formulate. There were references that "consideration of the landscape when promoting housing improvement and infrastructure development" and "to consider the landscape from the tourism viewpoint". Also, there were plans to utilize the process of reconstruction itself as a resource for tourist attraction. Furthermore, as a result of analyzing the individual plans described in the reconstruction plan, the reference to landscape, reference to the prediction of landscape change, reference to landscape protection exists in all 16 cities, towns, and villages. Totally 117 relevant plans have been found. Although many of them were intended to cope with the damage at the time of the disaster, there were several plans originally adopted by the local governments to make necessary improvements of the problems they had from the past by conducting disaster recovery.



The field survey was conducted for 16 municipalities in total in Kumamoto Prefecture. One year has passed since the earthquake disaster, and recovery works progressed in a wide range in Kumamoto Prefecture. In the recovery sites in various places, a secondary change of the landscape, which caused the recovery activity aimed at improving the convenience of life and safety, has already been taking place. Moreover, recovery works progressed also in Kumamoto castle which is also cultural asset and tourist attraction, as well as the station and the government office which are the center of town. As a result, we could confirm the change of landscape.



In this research, through the analysis of the reconstruction plan created by the municipalities affected by the Kumamoto earthquake and the field survey, from the viewpoint of Green Infrastructure, we could make clear the process of the landscape change occurred during the process of recovery/reconstruction of the living base, the tourist resources, the natural environment in the affected areas and its influence respectively. Although few local governments have formulated landscape-friendly reconstruction plans, to gain medium- and long-term benefits, we should make landscape-friendly reconstructions from the original planning stage. This is because it is the factor determining the richness of living base, tourism resources, and natural environment.