Basic Study on Regional Characteristics of Waterfront Area in Ehime Prefecture by Agricultural Settlement Unit of Agriculture and Forestry Census

Abstract

１．研究の背景と目的 日本は島国であることに加え，リアス式海岸に代表さ れる複雑な海岸地形を有し，海岸線の総延長は約 3 万 5 千 km と長大である。国土面積当たり海岸線延長は 93m/ km 2 ，人口当たりの海岸線延長は 28m/百人であり，いず れも人口一億人以上の国ではフィリピンに次いで長い 1） 。 すなわち，日本は，国土保全上，臨海地域の適切な利用 と管理が特に重要な国の一つである。 また，このような海岸線は，海域（日本の領海は約 43 万 km 2 ，排他的経済水域は約 405 万 km 2 ）と陸域（日 本の国土は約 38 万 km 2 ）の境界を形成する。すなわち， Abstract：We extracted the communities located in the coastal area and clarified the characteristics of them using the 2015 Agriculture and Forestry Census data and the results of the national census, taking Ehime Prefecture as an example. We categorized them used the employment rate data by industry and analyzed the agricultural area types of the communities included in each type. As a result, of the total 3,284 communities, 628 （19%） were coastal communities, and 23% （340,000） of the population lived there. In addition, from the viewpoint of agricultural area type, it was found that the ratio of hilly agricultural areas is high and agricultural land is often used as upland in coastal communities. As a result of cluster analysis using the ratio of employees by occupation as a variable, coastal communities were classified into 6 clusters. As a result, it was found that in the coastal area, mountainous agricultural communities are areas where fishing industry is thriving, and flatland agricultural communities are mostly citrus-cultivated areas using slopes. The high proportion of hilly agricultural communities is due to the development of relatively large orchards and the narrowness of the forests found on the islands and peninsulas. As a result, the number of communities not included in the mountainous agricultural area increases due to the increase in the cultivated land ratio or the decrease in the forest field ratio. Furthermore, it was found that many communities specializing in primary industry are in areas with high geographical isolation, and that the number of workers per community is small in these communities.