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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)在对黑石县居民出行调查的基础上，将农村公路划分为3个路段，并将每个路段组织在农村公路网下。结果表明，人车出行根数与路网理论计算的人车出行根数基本吻合。(2)津轻地区的稻田在历史上利用了几种类型的水利用。平泷区主要依靠再利用的排水和储存在池塘和排水渠中的雨水。该地区的流入和流出负荷小于日本其他地区。广崎区的一些水管理系统在水资源和农村环境日益减少的时代提供了一个有效的未来案例研究。(3)在野外对水跃型和水垫型跌水的声功率级、A计权声级等声特性进行了研究，并对岩城河多哥渠首的阶梯型鱼道和平川河第一平川渠首的鱼类上浮和水流条件、流速分布等水力特性进行了研究。1995-1997年6月至Seoln期间，Mittumenai河上的Mittumenai渠首工程。(4)采用3种分层稻田模型。在低排水条件下，封闭系统渗滤层为低DO，呈还原层，Fe、Mn离子在其中检出，而开放系统渗滤层为高DO，呈氧化层，Fe、Mn离子在其中未检出。(5)本文利用有限单元法，改变不透水层的边界条件，对湿地和农田地下水位进行了二维稳定流模拟。