Dynamics of Sediments Exchange and Transport in the Bay of Cadiz and the Adjacent Continental Shelf (SW - Spain)

Achab, Mohammed

doi:10.5772/20652

Cited by 5 publications

(8 citation statements)

References 47 publications

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“…The Bay of Cadiz, located in the south-west of Spain (36°30′N; 6°10′W; Figure 1), is defined by a bay or outer bay in its northern part, an island-barrier-lagoon or inner bay system in its southern part, and marshes and tidal planes in its western and eastern parts (Achab, 2011; Muñoz Perez and Sánchez de LaMadrid Rey, 1994). The outer bay (covering 118 km 2 ), which directly connects to the Atlantic Ocean, is strongly affected by storms, waves and littoral currents, and its seabed is predominantly sandy.…”

Section: Methodsmentioning

confidence: 99%

A multiproxy study distinguishes environmental change from diagenetic alteration in the recent sedimentary record of the inner Cadiz Bay (SW Spain)

et al. 2016

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In this study we reconstruct the recent environmental evolution of the inner Cadiz Bay using sedimentary records reaching back as far as 1700 AD. We report lithological descriptions of the sediments, and extensive mineralogical and geochemical analyses. An extraction technique that identifies different Fe phases provides an assessment of diagenetic alteration, which allows an estimation of the original organic matter inputs to the inner Cadiz Bay. Downcore variations in

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Section: Methodsmentioning

confidence: 99%

A multiproxy study distinguishes environmental change from diagenetic alteration in the recent sedimentary record of the inner Cadiz Bay (SW Spain)

et al. 2016

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“…The continental supplies come from the Guadalete River (Figure 1), from the tidal inlets and from the continuous mud transport from the marshes by ebb-currents. Human-induced development of the surrounding coastal areas associated with regular dredging, land disturbance, industry and tourism [49], in addition to wind-or tidal-driven sediment resuspension frequently result in pulsed, short-lived, turbidity episodes [50,51]. This environment, together with the Guadalquivir River, constitutes a significant source of sediment maintaining the sedimentary balance of the adjacent littoral area.…”

Section: Study Areamentioning

confidence: 99%

Evaluation of the First Year of Operational Sentinel-2A Data for Retrieval of Suspended Solids in Medium- to High-Turbidity Waters

Caballero

Steinmetz²,

Navarro

2018

Remote Sensing

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In this study, we apply high-resolution Sentinel-2A imagery to assist in the monitoring of the southwestern Spanish coast during its first year of data. The aim is to test suitability of MultiSpectral Imager (MSI) at higher resolution (10 m) for mapping Total Suspended Solids (TSS). Several field campaigns are carried out to collect TSS at three different sites in the Guadalquivir estuary, Cadiz Bay and Conil port. A regional multi-conditional remote sensing algorithm with a switching method that automatically selects the most sensitive TSS vs. water reflectance relationship is developed to estimate TSS concentration while avoiding saturation effects. An existing semi-analytical algorithm is calibrated by means of a cross-validation procedure based on both red 664 nm (r = 0.8, NRMSE of 25.06%) and near-infrared (NIR) 865 nm (r = 0.98, NRMSE of 10.28%) parts of the spectrum, showing the MSI sensor's great potential to estimate TSS even though it was not designed for aquatic remote sensing. The first year of data reveals improved monitoring along the coastal region at unprecedented resolution with accuracy to detect the Estuarine Turbidity Maximum (ETM). ACOLITE and POLYMER Atmospheric Correction strategies are applied over this coastal region (no in-situ data on water reflectance). The results confirm that the flexible POLYMER algorithm can address intense sun-glint effects. These findings encourage further research of water quality studies relying on both operational Sentinel-2A and Sentinel-2B, with great implications to improve the understanding of turbid coastal and inland water environments.

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“…일반적으로 해양 환경에서의 퇴적기작을 복원하 기 위해서는 입도의 누적빈도분포가 널리 사용된다 (e.g., Angusamy and Rajamanickam, 2006;Achab, 2011;Luo et al, 2013). 누적빈도분포를 이용한 복 원에는 다소의 문제점이 제기되고 있지만 (Syvitski and Murray, 1977;Tucker and Vacher, 1980) (Mckee et al, 1959;Dale, 1976;Rogers and Bremner, 1991), 연안지역의 사질 퇴적물에서는 감소 한다 (Rossigol, 1961, White andLewis, 1982).…”

Section: 퇴적물 입도의 누적 빈도unclassified

Characterization of Clastic and Organic Sediments Near Dokdo, Korea

Jun

Kim²,

Lee³

2013

Journal of the Mineralogical Society of Korea

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: Sediment transport mechanism and distribution of organic sediments are elucidated by the study of particle size, mineralogy, organic matters and microfossils of the surface samples collected from seafloor adjacent Dokdo island. Shallow marine sediments are dominated by coarse-grained sediments including gravel and sand, and their sedimentation has mainly been controlled by traction. While the samples collected from oceanic zone are characterized by high contents of fine-grained sediments such as silt and mud in bulk sediments, and the changes of mineral compositions including clay minerals and feldspar, and the fine sediments have been deposited mainly by suspension. The change of organic sedimentary communities is detected between neritic and oceanic zone. Although marine organic matter is predominant in neritic zone, terrestrial organic matter is monopolized according to increasing water depth. This trend is associated with grain size of sediments. The results also suggest that high pollen concentrations in whole organic matters may played an important role in excessive organic carbon in sediment.

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Dynamics of Sediments Exchange and Transport in the Bay of Cadiz and the Adjacent Continental Shelf (SW - Spain)

Cited by 5 publications

References 47 publications

A multiproxy study distinguishes environmental change from diagenetic alteration in the recent sedimentary record of the inner Cadiz Bay (SW Spain)

A multiproxy study distinguishes environmental change from diagenetic alteration in the recent sedimentary record of the inner Cadiz Bay (SW Spain)

Evaluation of the First Year of Operational Sentinel-2A Data for Retrieval of Suspended Solids in Medium- to High-Turbidity Waters

Characterization of Clastic and Organic Sediments Near Dokdo, Korea

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