Mechanism of Generation and Control of Red Soil Affecting Water Area Environment

红壤影响水域环境的产生与控制机制

基本信息

批准号：
13460105
负责人：
KUSAKA Tatsuro
金额：
$ 10.05万
依托单位：
Yamaguchi University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2002
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-13460105/
关键词：
Prtificial Rainfall Simulator Red Soil Pellet Turbidity Purification Diminution of Permeability Setting Basin Sedimentation

项目摘要

(1) The research group carried out a number of fundamental experiments using transparent cylindrical pipes and red type soil. The pipes were filled up with pellets, and muddy flow suspended with red soil was flown through the pellet layer that worked as a filter or absorbent. It was found that in case of pellet layer with the thickness of above 50cm and the permeability rate of 1.0x1.0, the muddy flow was purified to the best.(2) Besides pellets, bamboo chacoal, sand, air floats were used as filtering materials. The result showed that all these materials have purification ability more or less.(3) Using the muddy water mixed with standard sand and Kaolin clay, some other fundamental experiments and field observations were carried out to investigate the sedimentationtendency of soil particles and the effect of soil crust on hydraulic conductivity. From such observations and experiments concerned with the formation and development of soil crust, and their relation with the reduction of hydraulic conductivity, the erosion process in upland was analyzed and clarified.(4) Grain size and constituents of upland soil were investigated using the grain size accumulation apparatus. From the results of the experiments, it was clear that fertilizers in the fields had some effects on the dispersion and the sedimentation of soil particles.(5) From experiments using hydraulic experiment tool, it was observed that the setting point of wooden basket greatly influenced the water flow control inside the sediment pond.(6) Further experiments were carried out to investigate the cohesive effect of Kunigami-maji soil using different cohesive and soil-reforming materials, it was clear that application of Hydrochloric acide and Hydroxyaluminum with proper rate could improve the soil condition against erosion.

（1）研究小组使用透明的圆柱管和红色的土壤进行了许多基本实验。管道充满了颗粒，悬挂在红色土壤的泥泞流中，穿过颗粒层，该层用作过滤器或吸收性。已经发现，如果颗粒层的厚度高于50厘米，渗透率为1.0x1.0，则将泥泞的流量纯化至最佳。（2）除了颗粒外，竹chacoal，砂，沙子，空气浮子被用作滤材料。结果表明，所有这些材料或多或少具有纯化能力。（3）使用与标准砂和高岭土混合的泥泞水，进行了其他一些基本实验和现场观测，以研究土壤颗粒的沉积以及土壤壳对水力传导性的影响。从与土壤结皮的形成和发展有关的观察结果和实验中，分析并澄清了高地的侵蚀过程。（4）使用晶粒尺寸的积累仪研究了高地的侵蚀过程。从实验的结果来看，很明显，田间的肥料对土壤颗粒的分散和沉积物产生了一定的影响。（5）通过使用液压实验工具的实验，可以观察到木制篮子的设置极大地影响了储水池内部的水流控制，从而实现了进一步的cohig pond。土壤改良的材料，很明显，以适当速度使用盐水丙二醇和羟Yyarminum可以改善土壤条件针对侵蚀。