RT journal article
T1 Confirmation of beach accretion by grain-size trend analysis: Camposoto beach, Cádiz, SW Spain
A1 Poizot, E
A1 Anfuso Melfi, Giorgio
A1 Méar, Y
A1 Bellido, C
A2 Ciencias de la Tierra
K1 tracers
AB An application of the grain size trend analysis(GSTA) is used in an exploratory approach to characterizesediment transport on Camposoto beach (Cádiz, SW Spain).In May 2009 the mesotidal beach showed a well-developedswash bar on the upper foreshore, which was associatedwith fair-weather conditions prevailing just before and duringthe field survey. The results were tested by means of anautocorrelation statistical test (index I of Moran). Two sedimentologicaltrends were recognized, i.e. development towardsfiner, better sorted and more negatively skewedsediment (FB–), and towards finer, better sorted and lessnegatively or more positively skewed sediment (FB+). Bothvector fields were compared with results obtained frommore classical approaches (sand tracers, microtopographyand current measurements). This revealed that both trendscan be considered as realistic, the FB+ trend being identifiedfor the first time in a beach environment. The data demonstratethat, on the well-developed swash bar, sedimenttransported onshore becomes both finer and better sortedtowards the coast. On the lower foreshore, which exhibits asteeper slope produced by breaking waves, the higherenergyprocesses winnow out finer particles and therebyproduce negatively skewed grain-size distributions. The upperforeshore, which has a flatter and smoother slope, iscontrolled by lower-energy swash-backwash and overwashprocesses. As a result, the skewness of the grain-size distributionsevolves towards less negative or more positivevalues. The skewness parameter appears to be distributedas a function of the beach slope and, thus, reflects variationsin hydrodynamic energy. This has novel implications forcoastal management.
PB Springer Verlag
SN 0276-0460
YR 2013
FD 2013-01-01T00:00:00Z
LK http://hdl.handle.net/10498/15904
UL http://hdl.handle.net/10498/15904
LA eng
DS Repositorio Institucional de la Universidad de Cádiz
RD 14-nov-2026