流砂及び河床変動の実態把握に基づく河床変動計算の精度向上に関する研究

抄録

Many studies have been made on sediment discharge for a long time and many sediment discharge formulas have been thought up. However, they are based on the study with riverbed material of single grain size, and only a few of them proved the applicability for riverbed material of mixed grain size.

This is the paper on the applicability of sediment discharge formula targeting a natural river taking the Hinuma River as a model.

We calculated the volume of sediment discharge in each grain size of bed load and of suspended load by sediment discharge formulas and compared them with its actual measurement. In the numerical calculation, the riverbed variation was presented by each of sediment discharge formulas and the numerical values were compared with its observed data.

As a result of that, we found that the accuracy of the calculation on the reappearance was improved by selecting a suitable sediment discharge formula for riverbed variation.