大分市における高齢者福祉施設の地形的立地

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The purpose of this paper is to clarify the geomorphological location of the senior citizen welfare facilities distributed in Oita City. There are two kinds (Type A and Type B)in the senior citizen welfare facilities distributed in Oita City. In Type A facilities, the entire building is a welfare institution, whereas in Type B facilities part of the building is a welfare institution. Type A facilities have an tendency to be located in places where land prices are low because large sites are necessary for them, and many of them are distributed on plateau and the hilly areas. They are often located in rural areas of the alluvial surface. In this case, it is situatedin back marshes and abandoned river channels in terms of the micro geomorphology. Therefore, when Type A facilities are located on the alluvial surface, there is a high possibility to suffer from the damage of floods. On the other hand, when facilities are located on hills, the sites are made by cutting ridges and filling dissected valleys. Four facilites are located in the boundary part between the cutting and the filling ground. In this case, there is a possibility to suffer from damage due to earthquakes. Type B welfare facilities are located in the alluvial surface of urban and suburban areas for management efficiency, which are more accessible to users. However, the majority of facilities (hospital) do not raise the ground by filling. As mentioned above, it has been understood that there is a close relation between the position of the senior citizen welfare facilities and the geomorphology. When facilities are newly constructed, it will be necessary to consider geomorphological safety for natural damage such as floods and earthquakes in the future.
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大分市における高齢者福祉施設の地形的立地

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