고립파에 의한 경사면에서의 부유사 제승의 불확실성에 관한 실험적 연구 = An Experimental Study on The Uncertainty of Suspended Sediment Pickup on Slope by Solitary Wave

다국어 초록 (Multilingual Abstract)

Suspended sediment transport plays principal roles in morphological process of natural coastals. It is needed to understand the reason why interaction characteristics of solitary wave and suspended sediment. The present study shows that suspended sediment pickup derived on solitary wave celerity. The 2D prismatic open channel length is 12 m, width is 0.8 m, height is 0.75 m and slope is 1/6. Generation of solitary wave is used by rapidly opening the sluice gate. Bottom surface sediments are laid movable slope section by 0.03 m thickness and experimental sediments are used anathracite and jumoonjin sand. Techniques of suspended sediment pickup rate are designed equipment ASC(Absorptive Suspended sediment Collector). It could directly absorb 5 points suspended sediment by channel water depth. Solitary wave celerity is measued by ADV(Acoustic Doppler Velocimeter). Mounted two video cameras(Model No. : Sony, HDR-XR550) are used to image processing of suspended sediment concentration and turbidity. Suspended sediment pikcup rate(Einstein, 1950) is analyzed to nondimensionalization based on solitary wave celerity. The suspended sediment pickup rate is suggested that more effective plunging breaking type than spilling. The results indicates fundamental suspended sediment transport mechanism between solitary wave celerity and suspended sediment pickup based on laboratory experiments. Finally, the present study suggests that suspended sediment pickup rate by solitary wave is used only characteristics of sediment and solitary wave celerity.

참고문헌 (Reference)

1 이광호, "고립파(지진해일) 작용하의 수중방파제에 의한 파랑제어" 대한토목학회 28 (28): 323-334, 2008

2 전찬후, "경사면에 작용하는 고립파의 특성" 한국수자원학회 35 (35): 779-786, 2002

3 G. Carrier, "Water Waves of Finite Amplitude on a Sloping Beach" 97-109, 1958

4 H. Yeh, "Tsunami Scour Mechanisms Around a Cylinder"

5 C. E. Synolakis, "The Run-up of Solitary Waves" 523-545, 1987

6 H. A. Einstein, "The Bed-Load 함수 for Sediment Transportation" Open Channel Flow Technical Bulletin 1950

7 C. H. Kim, "Study on Failure Mechanism of Composite Breakwater due to Tsunami(Solitary wave)" 365-366, 2014

8 C. U. Lee, "Stability and Sliding Motion of Armor Units on Slopes of Coastal Structures" 20 (20): 59-71, 2000

9 L. C. Van Rijn, "Sedimentation of Dredged Channels by Currents and Waves" 112 (112): 541-559, 1986

10 L. C. Van Rijn, "Sediment Transport, Part II: Suspend Load Transport" 1104 (1104): 1613-1641, 1984

11 안태준, "S-소단 경사식 방파제에서의 처오름에 대한 실험연구" 한국해안,해양공학회 18 (18): 147-153, 2006

12 Y. S. Cho, "Run-up and Evolution of Solitary Waves on Steep Slopes" 28 (28): 59-168, 1995

13 A. F. Mostafa, "Role of Wave Pressure in Bedload Sediment Transport" 129 (129): 243-249, 2003

14 연태훈, "Quadtree 격자를 이용한 근해지진해일의 처오름높이 계산" 한국수자원학회 36 (36): 705-713, 2003

15 Y. F. Xiao, "Photoluminescence Saturation Independent of Excitation Pathway in Air-suspended Single-walled Carbon Nanotubes" 89 (89): 2014

16 Y. Li, "Non-breaking and Breaking Solitary Wave Run-up" 456 : 2002

17 T. Takahashi, "Modeling Sediment Transport due to Tsunamis with Exchange Rate between Bed Load Layer and Suspended Load Layer" 2000 : 1508-1519, 2001

18 Y. S. Cho, "A Study of Maximum Run-up Heights of Periodic Waves" 32 (32): 649-655, 1999