사연댐 수위조절 시 반구대암각화의 수리학적 특성에 대한 실험 연구 = An Experimental Study on Hydraulic Characteristics at Bangudae Petroglyphs by Changing Management Water Level of Sa-yeon Dam

국문 초록 (Abstract)

본 연구는 청동기시대에 제작된 것으로 추정되는 반구대암각화의 보존방안으로서 반구대 전면 하도구간의 수위조절을 통한 침수방지안이 적용될 경우 수위변화가 암벽면에 미치는 수리적인 영향을 수리모형실험을 통해 평가하였다. 저수지와 하천의 흐름특성을 고려할 수 있는 수리모형을 1:50 축척으로 제작하고, 수리모형실험 및 수치모의와 함께 암벽면에서의 수리특성의 변화를 분석하기 위한 압력측정을 병행하였다. 연구결과, 사연댐의 수위조절 시 침수시간은 감소하지만 침수를 방지하지는 못하는 것으로 나타났다. 홍수 시 최대유속은 10년~80년 홍수에서 발생하여 홍수량에 비례하지는 않았으며, 반구대암각화 전면에서의 유속증가량은 200년 빈도 시 약 425%, 2년 빈도 시 약 666%로 수위조절 시 홍수기의 암벽면의 훼손이 증가할 가능성이 있으므로, 이에 대한 대안 수립이 필요하다고 판단된다.

다국어 초록 (Multilingual Abstract)

If water level control will be executed in order to prevent the inundation for preservation of Bangudae petroglyphs, the assessment of hydraulic characteristic on rock sides was carried out with hydraulic model experiments. Hydraulic model was constructed by 1:50 scale to be applicable to flow characteristic of both stream and reservoir. Furthermore, this study was conducted to numerical simulation and pressure measurement on the surface of petroglyphs model at the same time. As results from this study, inundation time was clearly reduced but inundation prevention was barely occurred. Maximum mean velocity at the front of Bangudae petroglyphs was measured from 10 years to 80 years frequency flood event and not proportional to the frequency. Increasement of mean velocity was about 425% for 200 year frequency flood and about 666% for 2 year frequency flood compared to current condition. If water level control would be adjusted, potential damages of Bangudae petroglyphs would be likely to increase in flooding seasons, which should be requested for alternative prevention plan.

참고문헌 (Reference)

1 이찬희, "울산 반구대암각화의 손상도 및 사면안정성 평가" 한국문화재보존과학회 28 (28): 153-164, 2012

2 US Army Corps of Engineers, "Users Guide to RMA2 WES Version 4.3" 1997

3 Culture Heritage Administration, "The Survey Research for Preservation of Petroglyphs Group in Deagok River" 2012

4 Kim, Y.G., "Measurement of Surface Velocity Using LSPIV" Moyngji University 2003

5 Yoon, T.H., "Hydraulics" Chungmoongak 2002

6 Flow Science, I., "FLOW-3D User's Manuals, 8th Edition" Flow Science, Inc. 2002

7 K-water, "Basic Design for Increase Work of Flood Control Capability of Sa-yeon Dam" 2009

8 Kim, Y.T., "Analysis on Inundation Effect of Bangudae Petroglyphs by Water Level Variation of Sayeon-Dam" Kongju National University 2011

9 Kim, H. Y., "Analysis on Hydraulic Characteristics at Bangudae Petroglyphs by Water Level Declination of Sa-yeon Dam" 13 (13): 235-243, 2013

10 Lee, J.S., "A Study on the Velocity Profile in the Open-Channel Flow" Moyngji University 2005

11 Lee, D.S., "A Study on the Acquisition System of Raw Water Source in Ulsan Metropolitan City" University of Ulsan 2010

12 K-water, "A Report of Investigation Dam Sediment and Design of Topographic Map. (Sa-yeon dam)" 2005

13 Kim, S.C., "A Comparative Study of Hydrological Property With Hydraulic Model on the Bight River" Kangwon National University 2006