Equilibrium modeling of the beach profile on a macrotidal embayed low tide terrace beach

被引:31
|
作者
Lemos, Clara [1 ,2 ]
Floc'h, France [1 ,2 ]
Yates, Marissa [3 ,4 ]
Le Dantec, Nicolas [1 ,2 ,4 ]
Marieu, Vincent [5 ]
Hamon, Klervi [1 ,2 ]
Cuq, Veronique [2 ,6 ]
Suanez, Serge [2 ,6 ]
Delacourt, Christophe [1 ,2 ]
机构
[1] Univ Bretagne Occidentale, Geosci Ocean UMR 6538, Brest, France
[2] Inst Univ Europeen Mer, Rue Dumont dUrville, F-29280 Plouzane, France
[3] Univ Paris Est, St Venant Lab Hydraul, ENPC, Cerema,EDF R&D, Margny Les Compiegne, France
[4] Cerema, Tech Dept Water Sea & Rivers, F-29280 Plouzane, France
[5] Univ Bordeaux 1, URM 5805, EPOC OASU, Site Talence, Talence, France
[6] Univ Bretagne Occidentale, CNRS, UMR LETG 6554, Brest, France
关键词
Equilibrium model; Macrotidal; Intertidal profile; Low tide terrace; Cross-shore processes; ATLANTIC COAST; WAVE ACTIVITY; MORPHODYNAMICS; VARIABILITY; WINTER; SWASH; MORPHOLOGY; EUROPE; STORMS; SETUP;
D O I
10.1007/s10236-018-1185-1
中图分类号
P7 [海洋学];
学科分类号
0707 ;
摘要
Eleven-year long time series of monthly beach profile surveys and hourly incident wave conditions are analyzed for a macrotidal Low Tide Terrace beach. The lower intertidal zone of the beach has a pluriannual cycle, whereas the upper beach profile has a predominantly seasonal cycle. An equilibrium model is applied to study the variation of the contour elevation positions in the intertidal zone as a function of the wave energy, wave power, and water level. When forcing the model with wave energy, the predictive ability of the equilibrium model is around 60% in the upper intertidal zone but decreases to 40% in the lower intertidal zone. Using wave power increases the predictive ability up to 70% in both the upper and lower intertidal zones. However, changes around the inflection point are not well predicted. The equilibrium model is then extended to take into account the effects of the tide level. The initial results do not show an increase in the predictive capacity of the model, but do allow the model free parameters to represent more accurately the values expected in a macrotidal environment. This allows comparing the empirical model calibration in different tidal environment. The interpretation of the model free parameter variation across the intertidal zone highlights the behavior of the different zones along the intertidal beach profile. This contributes to a global interpretation of the four model parameters for beaches with different tidal ranges, and therefore to a global model applicable at a wide variety sites.
引用
收藏
页码:1207 / 1220
页数:14
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