Studies on the farm land consolidation of terrace paddy field area

1.从平、缓坡水田区农地整理进展情况比较来看，所谓梯田区（1/20以上陡坡地）农地整理进展极晚。特别是中国和四国地区，地形和土地条件非常差，梯田占总水田面积的比例远远超过全国平均水平。基于这些认识，对以下几个方面进行了调查研究：一是综合掌握梯田的分布、区位条件和土地利用的实际情况;二是充分发挥区域特色的土地利用方式、耕作方式和聚落调整方式;三是农业基础设施的整合方向，实现田改多用.在完成研究结果时，本文立足于与平原地区农地整理技术不同的观点，在对坡耕地整理实施实例调查结果和分析结果的基础上，完成了梯田地区综合整理规划技术，以建立适合梯田地区的合理、经济的建设方法。积累的数据。在梯田整理效果评价中，强调了梯田整理对促进居民定居、涵养水源、节约土地等方面的延伸效应，并提出了梯田整理效果的定量评价方法。

1. Judging from the comparison with the progress of farm land consolidation in both flat and gentle sloping paddy field area, that in the so-called terrace paddy field area (steep sloping land of more than 1/20) is late extremelly. Particularly, Chugoku and Shikoku districts, the topographical and land conditions are very poor, and the area rate of terrace paddy field to total paddy field extremely exceed the national average. Owing to these understandings, was had investigated and studied about the next points; first the synthetic grasp of actual conditions about distribution, condition of location and land use of terrace paddy field, second the way of land use, farming and adjustment of settlement making the most of regional characteristics, and the direction of agricultural infrastructure consolidation for the conversion of field into multipurpose one.2. In the completion of study results, we stood on a different viewpoint from the technique of farm land consolidation in flat area and completed the synthetic consolidation planning technique in terrace paddy field area for the establishment of rational and economical construction method suitable for terrace paddy field area based on the investigation results about enforcemen examples of farm land consolidation in sloping paddy field area and analytical results of accumulated data. Moreover, atthe estimation of consolidation effect in terrace paddy field area, we emphasized the extending effects like the promotion of permanent residence, dultivation of water resources and land conservation, and proposed its quantitative estimation method.