Creation of guidelines on local city suburbs development in consideration of smart decrease of the city area

本研究的目的是评估城市郊区的可持续性，这是一个成长期形成的城市郊区，在持续的人口减少和小城镇萎缩的情况下，并探讨自我维持的城市管理系统和社区的性质.本研究从宏观和微观两个层面分析了城市发展的结构和区域基础的形成过程，并探讨了城市设计制度中的问题，如批准的开发项目及其范围，以探讨城市郊区在一个成长时期形成的优缺点。郊区的发展本来是在城市规划区之外，现在已经扩展到与城市的广泛结构相连的区域，特别是在道路网络的高潜力和中心位置。由于没有有效的城市规划措施，这成为导致郊区蔓延的一个因素。已建成住房标准 ...更多信息 根据以下评估点确定，位于开发批准的城市化指定区域附近的开发区并不明显优于已建成的郊区扩展区上级：面积大小、空地比率、绿色空间比率、分隔街道比率、城市街区的形状和大小、公园的位置、邻近主要道路的中心性和污水处理条件。本研究也分析了城市建成区基础设施建设与地价的关系，包括固定资产税和城市规划税。我们得到了以下结果。尽管这些地区已经利用巨额投资开发了基础设施，但地价和税收一直低于地价多年来一直在下降的市中心。因此，可以评估，郊区蔓延并没有导致良好的建成城市环境的创造。本研究针对目前城市近郊区累积的情况下，已建区减少与人口减少的问题，发现以下几点：长崎市坡市地区的环境问题（防灾、防犯罪问题）、老年人居住问题（老龄化比率，孤独率），以及重建的更新问题（整个城镇的恶化）。此外，我们发现地方政府、居民（社区）和民间组织（NPO）之间的合作活动可以解决这些问题。最后，本研究发现，一个模拟模型（细胞自动机）的发展，使应用程序的一个建成的城市地区的下降情况的分析。新兴组织（NPO）介入城市区域管理的制度将是解决城市郊区问题的一个有效途径。少

This study aimed to evaluate the sustainability of city suburbs, which formed during a growth period, under on-going population decline and town shrinking, and to explore the self-sustaining system of urban management and the nature of community.1. This study examined a structure of urban development and formation process of district foundation by using both macro-scale and micro-scale analyses, and explored problems of urban design institutions, such as approved development project and its extent, in order to investigate the merits and demerits of city suburbs which formed during a growth period. Development of a suburban sprawl, which is originally outside of urban planning area, has been spread over in regional areas connecting with wide structures of urban cities, especially in a high potential and central site of road networks. It became a factor that leads to develop a suburban sprawl, since there has been no effective measure for urban planning. The standard of built-up housing … More development areas located close to zones designated for urbanization under development approval was not significantly superior to the built-up suburban sprawl areas, determined by the following assessment points ; an area size, a vacant land ratio, a green space ratio, a compartment street ratio, a shape and size of city block, location of parks, centrality of main road adjacent, and sewerage condition.2. This study also analyzed the relationship between infrastructure development and land price including fixed property tax and city planning tax in built-up urban areas. We obtained the following result. The land price and tax have kept lower than those of city center of which land price have been dropping for many years, even though the areas have been developed infrastructure using huge amount of investments. Therefore, it can be evaluated that the suburban sprawl has not led to creation of good build-up city environment.3. Considered the problems of a declining of built-up areas and population reduction under the present condition of accumulated suburban city areas, this study revealed that the following findings ; the environmental problem of the slope city area in Nagasaki city(problems of disaster prevention and crime prevention), the problem of aged-people habitation(an aged ratio, the rate of solitude), and the problem of renewal of rebuilding(deterioration of the whole town). Moreover, we have found the collaborated activities to solve against those problems in the areas among the local government administration, residents(community), and civic organizations(NPO).4. Lastly, this study found that a development of a simulation model(Cell Automa) enables application to an analysis of a declining scenario of a built-up city area. The system that newly emerging organizations(NPO) intervene the urban area management will be a solution of the problem of city suburbs in the age of reduction. Less