An Analysis of Streambed Changes Downstream of Daecheong Dam

• 영문명: An Analysis of Streambed Changes Downstream of Daecheong Dam
• 발행기관: 한국방재학회
• 저자명: Seo, Hyeong-Deok Jeong, Sang-Man Kim, Lee-Hyung Choi, Kyu-Ho
• 간행물 정보: 『2. 한국방재학회 논문집』8권1호, 103~108쪽, 전체 6쪽
• 주제분류: 공학 > 기타공학
• 파일형태: PDF
• 발행일자: 2008.02.28

영문 초록

Riverbed change is greatly influenced by artificial factors such as dam construction, gravel collection, and river improvement. This study simulated a long-term bed change based on the GSTARS3 model using actual data from the area downstream of the Geum River Daecheong Dam and compared the estimation with a section of the actual measurement. As a result, it was found that the section of the actual measurement was far lower than the result of the simulation in terms of long-term bed change. While the area downstream of Daecheong Dam displayed approximately an average of 2.29 m of streambed degradation on average while the upper stream area showed approximately 0.63 m of bed degradation over 24 years. In the simulation of the area downstream of Daecheong Dam based on the GSTARS3 model, similar bed degradation was observed. However, a great difference was detected between the result and the actual measurement. According to the cause analysis, the riverbed in the area downstream of Daecheong Dam has continuously degraded due to the dam construction and mass collection of gravel. The mass collection of gravel was the main cause of riverbed change. It was found that about 76% of all riverbed degradation was caused by the mass collection of gravel.

키워드

Streambed Changes Gravel Mining Daecheong Dam GSTARS3 Model