Assessment and Preservation of the Agriculural Environmennt System for the Farmland in the Lowland

低地农田农业环境系统评价与保护

基本信息

批准号：
08456115
负责人：
TANIGUCHI Ken
金额：
$ 5.31万
依托单位：
Hirosaki University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

项目摘要

(1) On the basic of the person trip survey in Kuroishi district, the rural roads were classified 3 Links and every Links were organized under the rural road network. Close agreement between person trip roots and calculated roots by road network theory was obtained.(2) The paddy areas in Tsugaru Region has historically utilized several types of water utilization. Hirataki District mainly depends on re-used drainage water and rain water stored in ponds and in drainage canals. The inflow and outflow loads of this area is smaller than those of other areas in Japan. Some water management system in Hirosaki District provide an effective case study of future in a time of dwindling water resources and rural environment.(3) Sound characteristics, such as the scoustic power level, the A-weighted sound level in a hydraulic jump type and water cushion type drops were studied in fields.And, ascending of fishes and hydraulic characteristics such as flow condition, distribution of velocity were examined in the step type the fishway of Togo headworks in Iwaki river and the first Hirakawa headworks in Hirakawa river, Mittumenai headworks in Mittumenai river from June till Setember in 1995-1997.(4) 3 models for paddy field with stratified layrs were used. In case of a low drainage, the closed system percolation layrs were low DO,and presented a reducing layr, in which Fe, Mn were detected.However the open system percolation layrs were high DO,and were an oxidation layr, in which Fe, Mn ions couldn't be detected.(5) Changing boundary conditions of imperious layr, these reports are simulated about groundwater level of wetland and agricultural land by 2 dimensional steady flows using F.E.M.

(1)在黑石地区的人员出行调查的基础上，将农村道路划分为3个环路，并将每个环路都组织在农村公路网之下。得出了人行根与路网理论计算根之间的密切一致性。(2)津轻地区的水田历史上曾利用过多种类型的水利用。平泷地区主要依靠再利用的排水以及储存在池塘和排水沟中的雨水。该地区的流入和流出负荷比日本其他地区要小。弘前地区的一些水管理系统为未来水资源和农村环境日益减少的时代提供了有效的案例研究。(3)声音特征，例如声学功率级、水跃式的A计权声级和在现场研究了水垫式落差。并且，在磐城河多乡首部工程和日本第一平川首部工程的阶梯式鱼道中，研究了鱼类的上升和水流状况、速度分布等水力特性。 1995-1997年6月至9月的平川河、Mittumenai河首工程。(4)使用了3个分层水田模型。在低排水情况下，封闭系统渗流层为低DO，呈现还原层，其中检测到Fe、Mn。而开放系统渗流层为高DO，为氧化层，其中检测到Fe、Mn。未能检测到Mn离子。(5)改变霸气层边界条件，利用有限元法通过二维稳态流模拟了湿地和农田的地下水位。