COMPREHENSIVE STUDY ON DEVELOPMENT TREND AND LAND USE PLANNING IN A LOCAL CITY AFTER ABOLISHING URBANIZATION CONTROLAREA

利用GIS和问卷调查的方法，对1988年取消城市化控制区后的宫古之城市1995-2004年的发展趋势和居住在前城市化控制区的居民的意识进行了调查。结果如下。1)与2002年相比，非城市化促进区的开发项目数量有所减少，而非城市化控制区的开发项目数量有所增加。2)将建筑面积比率下调至200%，对控制前城市化控制区内的发展并不起作用。3)大部分住宅及商业发展项目均位于用途区的边缘地带。4)《城市规划法》第42条允许的1000平方米以上的开发相对较低，占所有开发的14%。5)2005年，前城市化控制区的几个地区被开发和内部水淹没。6)研究结果表明，城市化前控制区土地利用的取消促进了城市化前控制区的发展，同时也带来了一些与洪涝灾害有关的问题，为城市化前控制区土地利用总体规划提供了参考。7)城市总体规划对土地利用管理的重要性日益凸显。8)因此，需要对开发性蔓延给城市经营带来的负面影响进行评估。9)城市规划区和农业用地的开发许可程序应得到加强。10)地方政府应解释城市规划和土地利用规划系统的目的，开发造成的灾害风险应传播给公民。11)中央和地方政府应建立土地公/私交易的知情同意制度/程序。

The development trends during 1995-2004 in Miyakonojo city after the abolishment of urbanization control area in 1988 and consciousness of the people who live in ex-urbanization control area were investigated by using GIS and questionnaire surveys. The results are as follows. 1) The number of the developments in ex-urbanization promotion area decreased whereas the number in ex-urbanization control area increased from 2002. 2) The Down-zoning to 200% of floor-area ratio did not work for the control of developments in ex-urbanization control area. 3) Most residential and commercial developments were located in the fringe regions of use district. 4) The developments more than 1000m^2 permitted by the Article 42 of City Planning Law were relatively low at 14% of all developments. 5) Several districts in the ex-urbanization control area were developed and inundated by inside water in 2005. 6) These results show that the abolishment promoted the developments, and then, caused some problems concerned with flood disaster in the ex-urbanization control area.The results give us some information about comprehensive land use planning. 7) City Master Plan becomes more important for land use management. 8) It is needed to evaluate the negative effects of the development spread on city management. 9) The development permission procedures in city planning area and agricultural fields should be consolidated. 10) Local governments should explain the purposes of city planning and land use planning systems, and disaster risks caused by development spread to citizens. 11) Central and local governments should establish an informed-consent system/procedure in public/private dealing of land.