THE PROCESS OF GENERATION OF APPROACH VELOCITY THAT AFFECTS THE ESTIMATION OF OUTFLOW CAUSED BY A FLOOD INTO A SMALL CAPACITY DAM RESERVOIR
-
- SUZUKI Hiroyuki
- 石川工業高等専門学校 環境都市工学科
-
- KAJITA Koudai
- 石川県七尾港湾事務所
-
- MUKAI Nao
- 国土交通省信濃川河川事務所
-
- IKEDA Daisuke
- 国土交通省富山河川国道事務所
Bibliographic Information
- Other Title
-
- 小容量ダム貯水池における洪水流入に起因した放流量推定に影響を及ぼす接近流速の発生過程
Abstract
Past studies indicated that the outflow from a small capacity dam in a large flood period was greatly underestimated. This is because the approach velocity head was not taken into consideration in the calculation of outflow from the dam. However, the process by which approach velocity is generated has not been investigated in past studies. In this study, the process by which approach velocity is generated was investigated by 3D simulation targeting a small capacity dam reservoir in which the occurrence of approach velocity was confirmed in a past study. Furthermore, in this study, the condition in which approach velocity is generated and the influence of approach velocity on outflow estimation were investigated by an experiment on flow on a weir. When the overflow depth is larger than the height of the weir, it was shown that approach velocity becomes so large that it cannot be ignored when calculating outflow.
Journal
-
- Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering)
-
Journal of Japan Society of Civil Engineers, Ser. B1 (Hydraulic Engineering) 74 (3), 70-82, 2018
Japan Society of Civil Engineers
- Tweet
Details 詳細情報について
-
- CRID
- 1390001288082777856
-
- ISSN
- 2185467X
-
- Text Lang
- ja
-
- Data Source
-
- JaLC
- Crossref
-
- Abstract License Flag
- Disallowed