| Title |
Spatial Influences of Flood Controls in Dam Operations |
| Authors |
정용(Jung, Yong) ; 김남원(Kim, Nam Won) |
| DOI |
https://doi.org/10.12652/Ksce.2018.38.3.0407 |
| Keywords |
홍수저감율;공간적 특성;유출총량;낙동강유역 Flood reduction rate;Spatial characteristics;Flood discharge;Nakdong river basin |
| Abstract |
This study analyzed the role of dams for the flood control by the observed and simulated hourly flood discharge data. The study area was the Nakdong river basin with Andong and Imha dams. For the analysis 31 flood events from 1997 to 2010 were selected. In the analysis of the flood reduction rate (FRR) of dam itself, the FRR was not decreased with higher size of floods which is not as we expected. In order to see the trend of flood reduction rate depending on the flood size, flood discharge volume presents it better than peak flood discharge. In the comparison of the flood reduction effects of the two dams, Andong dam has 7% larger flood reduction influence at the Sungju gauging station (SGS) located farthest from the selected watershed. Comparing the ratio of the watershed area based on the covered size of the SGS, the FRR of dam is smaller than the area rate. The impact of FRR of dam showed that the FRR fell below 10% when reaching the size of watershed area corresponding to 8.5 times of the size of watershed area of the dam which is larger than Namhan river basin (7 times). |