An Experimental Study of Beach Evolution with an Artificial Seepage
Changbo Jiang*,**, Yizhuang Liu*, Bin Deng*,**,†, Yu Yao*,**, and Qiong Huang***
*School of Hydraulic Engineering, Changsha University of Science and Technology
Changsha 410114, P. R. China
**Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province, Changsha 410114, P. R. China
***Guangzhou Zhengjian Construction Engineering Design Co., Ltd., Guangzhou 510220, P. R. China
Beach erosion caused by extreme wave events (storm surges) is reported to occur in many coastal areas. Artificially lowering the groundwater table effectively stabilizes sand beaches in an environmentally friendly way. Mechanisms affecting beach stabilization remain unclear, however, due to the complex interaction between waves and coastal seepage. This study discusses the effects of coastal seepage on beach profile evolution and bed materials sorting based on laboratory experiments in which seepage is induced artificially by a drain pipe at three cross-shore locations on a 1:10 beach. Morphodynamic beach responses with and without seepage under a typical cnoidal wave condition are reported. Results show that artificial seepage impacts only insignificantly on total upper-beach deposition volume but could increase accretion on the berm’s leeside by reducing seaside sand accumulation. It also induces a steeper berm slope and shoreline recession. A drain pipe near the shoreline generated the greatest accretion height on the upper beach. Seepage location had no significance effect on bed material sorting, however.
-  G. H. Lee, R. J. Nicholls, and W. A. Birkemeier, “Storm-driven variability of the beach-near shore profile at Duck, North Carolina, USA, 1981-1991,” Marine Geology, Vol.148, pp. 163-177, 1998.
-  H. M. Fritz, C. Blount, R. Sokoloski, J. Singleton, A. Fuggle, B. G. McAdoo et al., “Hurricane Katrina storm surge distribution and field observations on the Mississippi Barrier Island,” Estuarine, Coastal and Shelf Science, Vol.74, pp. 12-20, 2007.
-  M. M. Fiore, E. E. D’Onofrio, J. L. Pousa, E. J. Schnack, and G. R. Bértola, “Storm surges and coastal impacts at Mar del Plata, Argentina,” Continental Shelf Research, Vol.29, pp. 1643-1649, 2009.
-  P. Nielsen, S. Robert, B. Moller-Christiansen, and P. Oliva, “Infiltration effects on sediment mobility under waves,” Coastal Engineering, Vol.42, pp. 105-114, 2001.
-  M. R. A. Bagnoldm, “Beach formation by waves; some model experiments in a wave tank,” J. Institution Civil Engineering, Vol.15, pp. 27-54, 1940.
-  W.S. Grant, “Influence of the water table on beach aggradations and degradation,” J. Marine Research, Vol.7, pp. 655-660, 1948.
-  G. Elioti and D. J. Clarke, “Semi diurnal variation in beach faces aggradations and degradation,” Marine Geology, Vol.79, pp. 1-22, 1988.
-  L. Li and D. A. Barry, “Wave-induced groundwater flow,” Advances in Water Resources, Vol.23, pp. 325-337, 2000.
-  G. Masselink and L. Li, “The role of swash infiltration in determining the beachface gradient: a numerical study,” Marine Geology, Vol.176, pp. 139-156, 2001.
-  D. C. Conley and J. G. Griffin, “Direct measurements of bed stress under swash in the field,” J. of Geophysical Research, Vol.109, C3, 2004.
-  D. P. Horn, “Measurements and modeling of beach groundwater flow in the swash-zone: a review,” Continental Shelf Research, Vol.26, pp. 622-652, 2006.
-  A. R. Packwood, “The influence of beach porosity on wave uprush and backwash,” Coastal Engineering, Vol.7, pp. 29-40, 1983.
-  M. Sato, “Understand watertable and beach face erosion,” Proc. 22nd Int. Conf. on Coastal Engineering, pp. 2645-2657, 1990.
-  I. L. Turner, G. Masselink, “Swash infiltration – exfiltration and sediment transport,” J. of Geophysical Research, Vol.103, pp. 30813–30824, 1998.
-  J. Chappell, I. G. Eliot, M. P. Bradshaw, and E. Lonsdale, “Experimental control of beach face dynamics by water table pumping,” Engineering Geology, Vol.14, pp. 29-41, 1979.
-  G. Goler, “Numerical Modeling of Groundwater Flow Behavior in Response to Beach Dewatering,” Doctoral dissertation: Middle East Technical University, 2004.
-  A. W.-K. Law, S.-Y. Lim, and B.-Y. Liu, “A note on transient beach evolution with artificial seepage in the swash zone,” J. of Coastal Research, Vol.18, pp. 379-387, 2002.
-  L. Damiani, D. Vicinanza, F. Aristodemo, A. Saponieri, and S. Corvaro, “Experimental investigation on wave set-up and nearshore velocity field in presence of a BDS,” J. of Coastal Research, special issue 64, pp. 55-59, 2011.
-  F. Aristodemo, P. Ciavola, P. Veltri, and A. Saponieri, “The influence of a Beach Drainage System on wave reflection and surf beat processes,” J. of Coastal Research, special issue 64, pp. 455-459, 2011.
-  P. Contestabile, F. Aristodemo, D. Vicinanza, and P. Ciavola, “Laboratory study on a beach drainage system,” Coastal Engineering, Vol.66, pp. 50-64. 2012.
-  P. Ciavola, P. Contestabile, F. Aristodemo, and D. Vicinanza, “Beach sediment mixing under drained and undrained conditions,” J. of Coastal Research, special issue 65, pp. 1503-1508, 2013.
-  P. Nielsen, “Coastal groundwater dynamics,” In: Proc. of Coastal Dynamics ’97, ASCE, pp. 546555, 1997.
-  B. R. Seiffert, M. Hayatdavoodi, and R. C. Ertekin.“Experiments and calculations of cnoidal wave loads on a coastal-bridge deck with girders,” European J. of Mechanics B/Fluids, Vol.52, pp. 191-205, 2015.
-  D. L. Inman and J. D. Frautschy, “Littoral processes and the development of shorelines,” Proc. Coastal Engineering Specialty Conf., ASCE, pp. 511-536, 1966.
-  A. G. Maclean, “Open channel velocity profiles over a zone of rapid infiltration,” J. of Hydraulic Research, Vol.29, pp. 15-27, 1991.
-  D.C. Conley and D. Inman, “Ventilated oscillatory boundary layers,” J. of Fluid Mechanics, Vol.273, pp. 261284, 1994.
-  X. W. Chen and Y. M. Chiew, “Velocity distribution of turbulent open channel flow with bed suction,” J. of Hydraulic Research, Vol.130, pp. 140-148, 2004.
-  Y. Celikouglu, Y. Yüksel, and M.S. Kabdaşli, “Cross-shore sorting on a beach under wave action,” J. of Coastal Research, Vol.22, pp. 487-501, 2006.
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