山地河川における石礫の移動と掃流砂量に関する研究 : 木津川上流水源地帯のタコラ谷における観測

概要

論文の詳細を見る
It is required to satisfy the several conditions to give the scientific basis to the plan of erosion control. One of them is an accurate estimate of the sediment discharge. Ordinarily, the sediment discharge is calculated by using a few sediment discharge formula which may be able to apply to the mountain stream. When comparing the calculated value with measured one, however, we often find that the two do not agree with each other. In order to investigate the cause of this disagreement, we set the artificially colored gravels on the bed of mountain stream and surveyed the distance of movement of them in detail. In addtion, we examined Meyer-Peter and Muller's equation on the basis of the measured sediment discharge after flood. The main results are as follows. Although the conditions of stream bed at five measuring lines are approximately same, there is a large difference in the distance of movement of colored gravels at each line. It is difficult to find a certain relation between the weight of colored gravels and the distance of movement. There is a strong correlation between maximum flow rate and distance of movement of colored gravels during observation periods. Only when the effective tractive force ratio of Meyer-Peter and Muller's equation is 0.66, the calculated values of sediment discharge shows good accordance with the measured ones.
応用森林学会の論文
1993-03-25