A Monitoring Method for Sediment Movement in Mountain Watershed with an Index of Turbidity

山区流域泥沙运动的浊度指数监测方法

基本信息

批准号：
13660146
负责人：
FUJITA Masaharu
金额：
$ 2.18万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
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/grant/KAKENHI-PROJECT-13660146/
关键词：
sediment movement monitoring turbidity wash load sediment production sediment runoff mountain rivers 流砂系

项目摘要

The purpose of this research is to establish a method of monitoring sediment movement in a mountainous watershed with an index of turbidity. The turbidity and water discharge were continuously measured at an experimental dam section that is in the Ashiarai-dani experimental watershed of Hodaka Sabo Observatory of Kyoto University. The point of the study is to clarify whether the sediment movement in the upstream reach of the observation point is indirectly watched with the data. To observe the situation of sediment movement in the torrent, a video camera system set up in a headwater area in the observation reach. Also, the grain size distributions of the produced sediment, the sediment deposit and the turbidity material were investigated. The result is summarized as follows:1. Turbid water contains the sediments and organic matter. The percentage of the organic matter was 14 to 22%. The grain size of the sediment in the turbid water is less than 0.2mm and 5 to 10 percents of the fresh sediment produced at the source are those sediments. The turbidity materials are washed out of the fresh sediment under movement. As a result, the turbidity materials were not contained in the sediment brought up to the dam section.2. The amount of the sediment supplied from the source is estimated from the accumulated load of turbidity materials at the dam section.3. The hysteresis curves of turbidity and water discharge represent the situation of sediment movement.4. A method for monitoring sediment movement in mountain streams with an index of turbidity is promising.

这项研究的目的是建立一种用浊度指数的山流域监测沉积物运动的方法。在京都大学Hodaka Sabo Observatory的Ashiarai-Dani实验分水岭中，在一个实验大坝部分中连续测量浊度和水排放。该研究的目的是阐明观测点上游触及范围中的沉积物运动是否与数据间接观察。为了观察洪流中沉积物运动的状况，在观察到的源头区域中设置了摄像机系统。同样，研究了产生的沉积物，沉积物沉积物和浊度材料的晶粒尺寸分布。结果总结如下：1。浑浊的水含有沉积物和有机物。有机物的百分比为14％至22％。浊水中沉积物的晶粒尺寸小于0.2mm，源在源头产生的新鲜沉积物的5至10个是那些沉积物。浊度材料被从运动下的新鲜沉积物中冲出。结果，浊度材料不包含在大坝部分的沉积物中。2。从源提供的沉积物量是根据大坝部分的浊度材料的累积负载估算的3。浊度和水排出的磁滞曲线代表沉积物运动的状况4。一种监测具有浊度指数的山流中沉积物运动的方法是有希望的。