Temporal assessment of sediment transport from beach nourishments by using foraminifera as natural tracers

Benavente, Javier; Prieto, Francisco Javier Gracia; Anfuso, Giorgio; López-Aguayo, Francisco

doi:10.1016/j.coastaleng.2004.12.002

Cited by 17 publications

(13 citation statements)

References 16 publications

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“…rapidly accreting area along the whole study zone. This behaviour was also observed in 273 the short-term evolution of the beach (Benavente et al, 2005b). However, the most 274 remarkable beach regarding coastal changes is Levante beach, a unique erosional 275 hotspot in Cadiz coast.…”

Section: Approximate Position Of Table 1 188 189mentioning

confidence: 68%

Shoreline change patterns in sandy coasts. A case study in SW Spain

2013

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12 13Coastal changes on sandy shorelines are continuous and occur at diverse spatial and 14 temporal scales. Gaining knowledge on beach change processes increases our capability 15 to manage risks affecting the increasing population living in coastal areas, especially 16 shoreline erosion. Processes and factors involved in medium-and short-term beach 17 changes depend on the morphological and dynamic characteristics of the coast. In this 18 work, the decadal behaviour of 58 sandy beaches along the 150 km long South-Atlantic 19 coast of Spain, between Guadalquivir river mouth and the Strait of Gibraltar, is analysed 20 in order to investigate the relationships between shoreline change patterns and the 21 diverse morphological and dynamic factors controlling beach evolution in the area. For 22 this purpose, georectified aerial photographs spanning the period 1956-2008 were 23 compared in a GIS environment to calculate rates of shoreline change. Short-term 24 evolution of beach profiles was also analysed in selected areas of interest. 25 Manuscript Click here to view linked ReferencesResults show that the study area exhibits a great variety of shoreline evolution trends, 26 with prevailing erosion in the northern and central sectors and stability or even accretion 27 in the southern sector. In general, sediment availability is the main factor determining 28 coastal erodibility in the area, largely conditioned by the reduction in fluvial sediment 29 supply caused by river basin regulation. Nearshore bathymetry also has a great 30 significance, as it controls wave refraction-diffraction patterns and wave energy 31 concentration on certain zones. Human interventions on the coast also represent a major 32 influence on beach erodibility in the study area. Severe detrimental effects are caused at 33 certain points by shore-normal engineering structures blocking longshore drift. 34Additionally extensive urban development in backbeach environments has a significant 35 influence on sediment budget at certain areas. 36On the basis of these results, a morphological and evolutive classification of sandy 37 beaches is proposed, taking into account the way beach morphology influences 38 erosive/accretionary processes. Rectilinear beaches and enclosed beaches typically 39show dynamic equilibrium or even accretion trends, whereas reef-supported beaches 40 tend to be dominated by erosion. Headland-bay beaches show complex evolution 41 patterns greatly influenced by local conditions, such as specific shoaling processes or 42 local winds. This classification is useful not only in forecasting general shoreline 43 behaviour in the near future, but also in selecting the most adequate type of intervention 44 when managing retreating coasts. 45 46

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Section: Approximate Position Of Table 1 188 189mentioning

confidence: 68%

Shoreline change patterns in sandy coasts. A case study in SW Spain

2013

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“…The sand used for beach nourishment commonly originates from locations with different sediment properties than the nourished site. Some properties that have been used for monitoring nourishment are grain size (Kana and Mohan, 1998;Hanson et al, 2002), foraminifera shell content (Benavente et al, 2005), mineralogical composition (Nordstrom et al, 2004), grain coatings (Evans and Tokar, 2000) and radioactivity of heavy minerals (Donoghue and Greenfield, 1991). Foraminifera shells have also been used to study sediment fluxes in a tidal inlet (Gao and Collins, 1995).…”

Section: Broader Application Of Sediment Fingerprintingmentioning

confidence: 99%

“…For landscape monitoring at a timescale of several years use can be made of erosion pins (Arens et al, 2004), topographical surveys (Dong et al, 2000;Van der Wal, 2004), sediment fingerprinting (Donoghue and Greenfield, 1991;Gao and Collins, 1995;Benavente et al, 2005) and time series of aerial photographs (Arens et al, 2004). Deronde et al (2004) used high resolution hyperspectral images and elevation data of the Belgian coast collected at a 1-year interval.…”

Section: Introductionmentioning

confidence: 99%

Sand transport dynamics after a foredune breach: A case study from Schoorl, The Netherlands

Meerkerk¹,

Arens²,

Lammeren³

et al. 2007

Geomorphology

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“…Several methodologies were developed and tested. Analysis of sediment grainsize patterns (McCave, 1978;McLaren, 1981;Gao and Collins, 1992;Guillén and Hoekstra, 1996;Pedreros et al, 1996), provenance investigations by means of compositional analysis (Van Andel and Poole, 1960;Gandolfi and Paganelli, 1975;Salomons and Mook, 1987;Balsam and Beeson, 2003), magnetic susceptibility measurements (Sach and Ellwood, 1988;Ellwood et al, 2006), isotopic ratios (Biscaye et al, 1974;Grousset et al, 1988;Revel et al, 1996) and biogenic debris (Murray et al, 1983;Nigam, 1986;Gao and Collins, 1995;Benavente et al, 2005) as natural tracers, along with radioactive (Crickmore and Lean, 1962) and fluorescent tracers (Yasso, 1966;Komar and Inman, 1970;Ciavola et al, 1998;Vila-Concejo et al, 2004;Balouin et al, 2005) have been the most widely used techniques over the years to gain a better all-around definition of sand transport and movement. Each one of these approaches has advantages and disadvantages, owing to the level of accuracy and effectiveness in regard to the ongoing research, the time interval studied by the experiments (active pathways of sediment distribution or mere provenance indications), ease of applicability, and cost.…”

Section: Introductionmentioning

confidence: 99%