REARRANGEMENT OF LAND AND WATER UTILIZATION IN RECLAIMED LAND (THE COASTAL AREA IN THE INLAND SEA OF SETO)

本研究的主要结果如下：1.濑户濑户内海沿岸地区开发过程的历史回顾及该地区的现代课题：该地区的水土资源开发可分为三个阶段。这些阶段的历史痕迹仍然存在于土地和水的现代利用中。今天，它已经开始重新安排利用系统。2.用水系统的重新安排：随着非农业部门的经济活动在该地区的今天显着增加，有必要重新安排过去为农业建设的用水系统和渠系。国家定向灌溉项目正在实施，以改善该系统。研究结果表明，该措施降低了水资源利用效率，并产生了新的需水.海水再生土地的集约利用和排水基础设施的改善：在再生中 ...更多信息 在过去，艾德的土地用于农业生产，集约化的土地利用，即城市化或多用途农业土地利用的改善，是目前的进展。径流特性发生变化，防洪安全水平显著下降。显然，无论是农村还是城市的区域排水设施，泵站和排水渠，都是由土地整治机构进行改良的，其目的和技术内容正在从传统的农业排水转变.土地整理制度在该地区发展中的作用及未来课题：重新安排该地区的土地和水资源利用系统将成为该地区最重要的问题。最后认为，这种安排应主要作为国家主导的土地整治项目来进行。同时指出，在改善沿海地区的同时，应重点改善作为上游降雨汇水区的后山地区。少

Results from this research are outlined as follows.1. The historical review of developing process of the coastal area in the Inland Sea of Seto and modern subjects of this area: There are three stages in land and water resources development in this area. The historical trace of those stages remains in the modern utilization of land and water. Today it has already started to rearrange the utilization system.2. Rearrangement of the water use system: As economical activity in non-agriculture sector remarkably raises in the area today, it is necessary to rearrange the water use system and the canal system constructed in the past for agriculture. The national oriented irrigation project is undertaken to improve the system. As its results, it is clear by this investigation that the efficiency of water utilization decreases and the new water demand occurs by this rearrangement.3. The intensive use in sea water reclaimed land and the improvement of infra-structures for drainage: In the reclaim … More ed land for agricultural production in the past, the intensive land use, that is, urbanization or improvement for multi-purpose agricultural land use is progressed in the present. The runoff characteristics change and the safety level against flood damage remarkably goes down. It is clear that the regional drainage facilities for both of the rural and urban area, pump station and drainage canal, are used to be improved by the land improvement institution, and its purpose and technical contents are changing from the conventional agricultural drainage.4. The role of the land improvement institution and the future subject in the development of the area: It will become the most important problem to rearrange the land and water utilization system in this area. It is concluded that this arrangement should be undertaken mainly as the national oriented land improvement project. It is also pointed out that it is important to improve the behind mountainous area, which is a catchment area of rainfall in the upstream, at the same time of improvement for the coastal area. Less