Modern sedimentation patterns and human impacts on the Barcelona continental shelf (NE Spain)
DOI:
https://doi.org/10.1344/105.000001528Keywords:
Llobregat, Besòs, Prodelta, Continental shelf, Accumulation rate, Human impactAbstract
Seafloor sediments were collected from the Barcelona continental shelf, NE Spain, to determine the textural characteristics and sedimentary processes related to different depositional systems and human pressures. The Barcelona continental shelf is principally influenced by the discharge of the Llobregat and Besòs rivers, and also by anthropogenic modifications such as the diversion of the Llobregat River or the enlargement of the Port of Barcelona. Sedimentological, physical and biogeochemical properties of 14 sediment cores and grabs indicate the presence of three distinct depositional environments linked to river-influenced, marine-influenced and mixed sedimentation. Sedimentological results have been used to groundtruth available backscatter data. The river-influenced environment, mainly associated to the Llobregat River input, does not reach the shelf edge as the prevailing oceanographic currents deflect sediments south-westward. Riverine sediments are fine-grained, with abundant plant debris, micas and relatively high organic carbon content. The associated sedimentary features are the Holocene prodelta and two modern mud patches. The marine-influenced environment extends north-easterly over the middle and outer shelf and on the upper continental slope. The sediments are coarser grained with abundant bioclasts and lower organic carbon content. Mixed sedimentation is present between the river- and marine-influenced areas. In addition, 210Pb, 226Ra and 137Cs radiometric analyses were used to estimate accumulation rates as well as to identify sites with disturbed sedimentation. Relatively high sediment accumulation rates (up to 0.70-1.03 g·cm-2·yr-1 equivalent to 6.4-10 mm·yr-1) are estimated on the Llobregat prodelta while moderate rates (0.21-0.46 g·cm-2·yr-1 or 1.6-3.6 mm·yr-1) are found between the Besòs and the Llobregat outlets. Two sediment cores show a sharp change from river-influenced to marine-dominated conditions that occurred in the mid- 1960s. This is interpreted as a significant regression (~2.5 km in 40 years) of the river-influenced domain that may be associated to the extension of the Port of Barcelona and the canalization of the Besòs River, amongst other reasons. Other important human impacts observed in the Barcelona continental shelf are (i) sediment mixing by dredging, ship anchoring and trawling; and (ii) possible organic pollution associated to river and sewage discharges.
References
Alexander, C.R., Venherm, C., 2003. Modern sedimentary processes in the Santa Monica, California continental margin: sediment accumulation, mixing and budget. Marine Environmental Research, 56(1-2), 177-204.
Aloisi, J.C., Cauwet, G., Gadel, F., Got, H., Monaco, A., Vile, F., Causse, C., Pagnon, M., 1976. Contribution à l’étude de la sedimentation récente et de la pollution sur le plateau continental du Golfe du Lion entre Fos-sur-Mer et Sète. Bulletin Bureau de Recherches Géologiques et Minières, 4(2), 69-83.
Amblas, D., Canals, M., Urgeles, R., Lastras, G., Liquete, C., Hughes-Clarke, J.E., Casamor, J.L., Calafat, A.M., 2006. Morphogenetic mesoscale analysis of the northeastern Iberian margin, NW Mediterranean Basin. Marine Geology, 234, 3-20.
Amorosi, A., 1995. Glaucony and sequence stratigraphy: a conceptual framework of distribution in siliciclastic sequences. Journal of Sedimentary Research, B65, 419-425.
APB (Autoritat Portuària de Barcelona), 2003. History of The Port. 1966: The expasion by the Delta. Available on-line: http://www.apb.es/en/APB/History/1966_Expansion_By_Delta.
Bentley, S.J., Nittrouer, C.A., 2003. Emplacement, modification, and preservation of event strata on a flood-dominated continental shelf: Eel shelf, Northern California. Continental Shelf Research, 23, 1465-1493.
Blondel, P., Murton, B.J., 1996. Handbook of Seafloor Sonar Imagery. Chichster (UK), John Wiley and Sons, 314pp.
Borgeld, J.C., Hughes-Clarke, J.E., Goff, J.A., Mayer, L.A., Curtis, J.A., 1999. Acoustic backscatter of the 1995 flood deposit on the Eel shelf. Marine Geology, 154, 197-210.
Bremner, J.M., Willis, J.P., 1993. Mineralogy and geochemistry of the clay fraction of sediments from the Namibian continental margin and the adjacent hinterland. Marine Geology, 115, 85-
Canals, M., Casamor, J.L., Urgeles, R., Farrán, M., Calafat, A.M., Amblas, D., Willmott, V., Estrada, F., Sánchez, A., Arnau, P., Frigola, J., Colàs, S., 2004. Mapa del relleu submarí de Catalunya. 1:250000. Institut Cartogràfic de Catalunya, Barcelona.
Castellón, A., Font, J., García, E., 1990. The Liguro-provençalCatalan current (NW Mediterranean) observed by Doppler profiling in the Baleary Sea. Scientia Marina, 54, 269-276.
Cattaneo, A., Correggiari, A., Langone, L., Trincardi, F., 2003. The late-Holocene Gargano subaqueous delta, Adriatic shelf: Sediment pathways and supply fluctuations. Marine Geology, 193(1-2), 61-91.
CLABSA (Clavegueram de Barcelona S.A.), 2007. Parc Fluvial del Besòs. La canalització del riu Besòs. Available on-line: http://www.clabsa.es/CAT/ParcFluvial_Canalitzacio.asp, last revision in July 2007.
Collier, J.S., Brown, C.J., 2005. Correlation of sidescan backscatter with grain size distribution of surficial seabed sediments. Marine Geology, 214(4), 431-449.
Corbett, D.R., Vance, D., Letrick, E., Mallinson, D., Culver, S., 2007. Decadal-scale sediment dynamics and environmental change in the Albemarle Estuarine System, North Carolina. Estuarine, Coastal and Shelf Science, 71(3-4), 717-729.
DeMaster, D.J., McKee, B.A., Nittrouer, C.A., Qian, J., Cheng, G., 1985. Rates of sediment accumulation and particle reworking based on radiochemical measurements from continental shelf deposits in the East China Sea. Continental Shelf Research, 4, 143-158.
Dounas, C., Davies, I., Triantafyllou, G., Koulouri, P., Petihakis, G., Arvanitidis, C., Sourlatzis, G., Eleftheriou, A., 2007. Large-scale impacts of bottom trawling on shelf primary productivity. Continental Shelf Research, 27(17), 2198-2210.
Edwards, B.D., Dartnell, P., Chezar, H., 2003. Characterizing benthic substrates of Santa Monica Bay with seafloor photography and multibeam sonar imagery. Marine Environmental Research, 56, 47-66.
EEA (European Environment Agency), 2005. EUROSION dataset: Geomorphology, Geology, Erosion trends and Coastal defence works. Available on-line: http://dataservice.eea.europa.eu/dataservice/metadetails.asp?id=730, last revision in February 2005.
Emerson, S., Hedges, J.I., 1988. Processes controlling the organic carbon content of open ocean sediments. Paleoceanography, 3, 621-634.
European Communities, 2000. The Urban Audit. Towards the Benchmarking of Quality of Life in 58 European Cities. Luxembourg, Office for Official Publications of the European Communities, II, 239pp. Available on-line: http://ec.europa.eu/regional_policy/urban2/urban/audit/src/yearbook.htm.
Fernández-Bastero, S., Gago-Duport, L., García, T., Velo, A., Santos, A., Vilas, F., 2001. Condiciones geoquímicas para la formación y maduración de minerales glauconíticos. In: Lago, M., Arranz, E., Galé, C. (eds.). Zaragoza, 23-26/10/2001, Proceedings, III Iberian Geochemistry Meeting and VIII Geochemistry Meeting of Spain, 439-442.
Flexas, M.M., Durrieu de Madron, X., García, M.A., Canals, M., Arnau, P., 2002. Flow variability in the Gulf of Lions during the MATER HFF experiment (March-May 1997). Journal of Marine Systems, 33-34, 197-214.
Font, J., García-Ladona, E., Górriz, G. E., 1995. The seasonality of mesoscale motion in the Northern Current of the western Mediterranean: several years of evidence. Oceanologica Acta, 18, 207-219.
Friedman, G.M., 1967. Dynamic processes and statistical parameters compared for size frequency distribution of beach and river sands. Journal of Sedimentary Petrology, 37, 327-354.
Frignani, M., Langone, L., Ravaioli, M., Sorgente, D., Alvisi, F., Albertazzi, S., 2005. Fine-sediment mass balance in the western Adriatic continental shelf over a century time scale. Marine Geology, 222-223, 113-133.
Gao, S., Ping Wang, Y., 2008. Changes in material fluxes from the Changjiang River and their implications on the adjoining continental shelf ecosystem. Continental Shelf Research, 28(12), 1490-1500.
Goff, J.A., Olson, H.C., Duncan, C.S., 2000. Correlation of sidescan backscatter intensity with grain-size distribution of shelf sediments, New Jersey margin. GeoMarine Letters, 20, 43-49.
Goldberg, E.D., 1963. Geochronology with 210Pb. In: International Atomic Energy Agency (eds.). Radioactive dating. Vienna, International Atomic Energy Agency (IAEA), 121-131.
Hartwell, S.I., 2008. Distribution of DDT and other persistent organic contaminants in Canyons and on the continental shelf off the central California coast. Marine Environmental Research, 65(3), 199-217.
Hedges, J.I., Keil, R.G., 1995. Sedimentary organic matter preservation: an assessment and speculative synthesis. Marine Chemistry, 49, 81-115.
Hedges, J.I., Keil, R.G., Benner, R., 1997. What happens to terrestrial organic matter in the ocean? Organic Geochemistry, 27, 195-212.
ITGE (Instituto Tecnológico GeoMinero de España), 1989. Mapa Geológico de la Plataforma Continental Española y Zonas Adyacentes. Madrid, escala 1:200000, memoria y hoja 35-42A (Barcelona), 117pp.
Jaeger, J.M., Nittrouer, C.A., 2006. A quantitative examination of modern sedimentary lithofacies formation on the glacially influenced Gulf of Alaska continental shelf. Continental Shelf Research, 26(17-18), 2178-2204.
Kato, H., Kitazao, H., Shimanaga, M., Nakatsuka, T., Shirayama, Y., Masuzawa, T., 2003. 210Pb and 137Cs in sediments from Sagami Bay: sedimentation rates and inventories. Progress in Oceanography, 57, 77-95.
Kuehl, S.A., DeMaster, D.J., Nittrouer, C.A., 1986. Nature of sediment accumulation on the Amazon continental shelf. Continental Shelf Research, 6, 209-225.
Lesueur, P., Jouanneau, J.M., Boust, D., Tastet, J.P., Weber, O., 2001. Sedimentation rates and fluxes in the continental shelf mud fields in the Bay of Biscay (France). Continental Shelf Research, 21(13-14), 1383-1401.
Lewis, R.C., Coale, K.H., Edwards, B.D., Marot, M., Douglas, J.N., Burton, E.J., 2002. Accumulation rate and mixing of shelf sediments in the Monterey Bay National Marine Sanctuary. Marine Geology, 181(1-3), 157-169.
Liquete, C., 2008. The Barcelona continental shelf: Source to Sink analysis and anthropogenic impacts. Doctoral Thesis. Barcelona (Spain), University of Barcelona, 276pp.
Liquete, C., Canals, M., Lastras, G., Amblas, D., Urgeles, R., De Mol, B., De Batist, M., Hughes-Clarke, J.E., 2007. Long-term development and current status of the Barcelona continental shelf: A source-to-sink approach. Continental Shelf Research, 27(13), 1779-1800.
Liquete, C., Canals, M., De Mol, B., De Batist, M., Trincardi, F., 2008. Quaternary stratal architecture of the Barcelona prodeltaic continental shelf (NW Mediterranean). Marine Geology, 250(3-4), 234-250.
Liquete, C., Canals, M., Ludwig, W., Arnau, P., 2009. Sediment discharge of the rivers of Catalonia, NE Spain, and the influence of human impacts. Journal of Hydrology, 366, 76-88.
Logvinenko, N.V., 1982. Origin of glauconite in the recent bottom sediments of the ocean. Sedimentary Geology, 31, 43-48.
Manzano, M., 1986. Estudio sedimentológico del prodelta holoceno del Llobregat. MScThesis. Barcelona (Spain), University of Barcelona, 150pp.
Marquès, M.A., 1974. Las formaciones cuaternarias del delta del Llobregat. Doctoral Thesis. Barcelona (Spain), University of Barcelona, 401pp.
Marquès, M.A., Julià, R., 1983. Coastal problems in Alt Emporadá Area (NE Catalonia, Spain). In: Bird, E.C.F., Fabbri, P. (eds.). Coastal Problems in Mediterranean Sea. International Geographical Union (IGU), Bologna, Commission on the Coastal Environment, 83-93.
McLaren, P., Boweles, D., 1985. The effects of sediment transport on grain size distributions. Journal of Sedimentary Petrology, 55, 457-470.
Meyers, P.A., 1994. Preservation of elemental and isotopic source identification of sedimentary organic matter. Chemical Geology, 114(3-4), 289-302.
Millot, C., 1999. Circulation in the Western Mediterranean Sea. Journal of Marine Systems, 20, 423-442.
Miralles, J., Radakovitch, O., Aloisi, J.-C., 2005. 210Pb sedi–mentation rates from the Northwestern Mediterranean margin. Marine Geology, 216(3), 155-167.
Miserocchi, S., Langone, L., Tesi, T., 2007. Content and isotopic composition of organic carbon within a flood layer in the Po River prodelta (Adriatic Sea). Continental Shelf Research, 27(3-4), 338-358.
Nelsen, T.A., Blackwelder, P., Hood, T., McKee, B., Romer, N., Alvarez-Zarikian, C., Metz, S., 1994. Time-based correlation of biogenic, lithogenic and authigenic sediment components with anthropogenic inputs in the Gulf of Mexico NECOP study area. Estuaries, 17(4), 873-885.
Nieuwenhuize, J., Maas, Y.E.M., Middelburg, J.J., 1994. Rapid analysis of organic carbon and nitrogen in particulate materials. Marine Chemistry, 45(3), 217-224.
Nitsche, F.O., Bell, R., Carbotte, S.M., Ryan, W.B.F., Flood, R., 2004. Process-related classification of acoustic data from the Hudson River Estuary. Marine Geology, 209, 131-145.
Odin, G.S. (ed.), 1988. Green Marine Clays. Oolitic Ironstone Facies, Verdine Facies, Glaucony Facies and Celadonite-Bearing Rock Facies - A Comparative Study. Elsevier (Ams–terdam), Developments in Sedimentology, 45, 446pp.
Odin, G.S., Matter, A., 1981. De glauconiarum origine. Sedimentology, 28, 611-641.
Palanques, A., Díaz, J.I., 1994. Anthropogenic heavy metal pollution in the sediment of the Barcelona continental shelf. Marine Environmental Research, 38, 17-31.
Palanques, A, Sanchez-Cabeza, J.A., Masqué, P., León, L, 1998. Historical record of heavy metals in a highly contaminated Mediterranean deposit: The Besós prodelta. Marine Chemistry, 61, 209-217.
Palanques, A., Guillén, J., Puig, P, 2001. Impact of bottom trawling on water turbidity and muddy sediment of an unfished continental shelf. Limnology and Oceanography, 46(5), 1100-1110.
Palanques, A., Masqué, P., Puig, P., Sanchez-Cabeza, J.A., Frignani M., Alvisi, F., 2008. Anthropogenic trace metals in the sedimentary record of the Llobregat continental shelf and adjacent Foix Submarine Canyon (northwestern Mediterranean). Marine Geology, 248(3-4), 213-227.
Palinkas, C.M., Nittrouer, C.A., 2006. Clinoform sedimentation along the Apennine shelf, Adriatic Sea. Marine Geology, 234(1-4), 245-260.
Palinkas, C.M., Nittrouer, C.A., 2007. Modern sediment accumulation on the Po shelf, Adriatic Sea. Continental Shelf Research, 27, 489-505.
Pettijohn, F.J., Potter, P.E., Siever, R., 1987. Sand and sandstone (2nd edition). New York, Springer-Verlag, 553pp.
Puchades, J.M., 1948. El río Besós. Estudio monográfico de hidrología fluvial. Publicaciones del Instituto Geológico, Diputación Provincial de Barcelona. Miscelanea Almera, 7(II), 195-354.
Puig, P., Palanques, A., 1998. Nepheloid structure and hydrographic control on the Barcelona continental margin, northwestern Mediterranean. Marine Geology, 149, 39-54.
Puig, P., Palanques, A., Sanchez-Cabeza, J.A., Masqué, P., 1999. Heavy metals in particulate matter and sediments in the southern Barcelona sedimentation system (North-western Mediterranean). Marine Chemistry, 63, 311-329.
Puig, P., Palanques, A., Guillén, J., García-Ladona, E., 2000. Deep slope currents and suspended particle fluxes in and around the Foix submarine canyon (NW Mediterranean). Deep-Sea Research I, 47, 343-366.
Pusceddu, A., Grémare, A., Escoubeyrou, K., Amouroux, J.M., Fiordelmondo, C., Danovaro, R., 2005. Impact of natural (storm) and anthropogenic (trawling) sediment resuspension on particulate organic matter in coastal environments. Continental Shelf Research, 25, 2505-2520.
Radakovitch, O., Heussner, S., 1999. Fluxes and budget of 210Pb on the continental margin of the Bay of Biscay (Northeastern Atlantic). Deep-Sea Research II, 46, 2175-2203.
Radakovitch, O., Charmasson, S., Arnaud, M., Bouisset, P., 1999. 210Pb and caesium accumulation in the Rhone delta sediments. Estuarine Coastal and Shelf Science, 48, 77-92.
Rao, V.P., Lamboy, M., Dupeuble, P.A., 1993. Verdine and other associated authigenic (glaucony, phosphate) facies from the surficial sediments of southwestern continental margin of India. Marine Geology, 111, 133-158.
Roussiez, V., Ludwig, W., Monaco, A., Probst, J.-L., Bouloubassi, I., Buscail, R., Saragoni, G., 2006. Sources and sinks of sedimentbound contaminants in the Gulf of Lions (NW Mediterranean Sea): A multi-tracer approach. Continental Shelf Research, 26, 1843-1857.
Rubio, A., Arnau, P.A., Espino, M., Flexas, M.M., Jordà, G., Salat, J., Puigdefàbregas, J., Arcilla, A.S., 2005. A field study of the behaviour of an anticyclonic eddy on the Catalan continental shelf (NW Mediterranean). Progress in Oceanography, 66, 142-156.
Sanchez-Cabeza, J.A., Masqué, P., Ani-Ragolta, I., 1998. 210Pb and 209Po analysis in sediments and soils by microwave acid digestion. Journal of Radioanalytical and Nuclear Chemistry, 227, 19-22.
Sanchez-Cabeza, J.A., Masqués, P., Ani-Ragolta, I., Merino, J., Frignani, M., Alvisi, F., Palanques, A, Puig, P., 1999. Sediment accumulation rates in the southern Barcelona continental margin (NW Mediterranean Sea) derived from 210Pb and 137Cs chronology. Progress in Oceanography, 44, 313-332.
Seiter, K., Hensen, C., Schroter, J., Zabel, M., 2004. Organic carbon content in surface sediments-defining regional provinces. Deep Sea Research I, 51(12), 2001-2026.
Shepard, F.P., 1954. Nomenclature based on sand-silt-clay ratios. Journal of Sedimentary Petrology, 24, 151-158.
Somayajulu, B.L.K., Rhushan, R., Sarkar, A., Burr, G.S., Jull, A.J.T., 1999. Sediment deposition rates on the continental margins of the eastern Arabian Sea using 210Pb, 137Cs and 14C. Science of the Total Environment, 237, 429-439.
Sommerfield, C.K., Nittrouer, C.A., 1999. Modern accumulation rates and a sediment budget for the Eel shelf: a flood-dominated depositional environment. Marine Geology, 154(1-4), 227-241.
Sommerfield, C.K., Ogston, A.S., Mullenbach, B.L., Drake, D.E., Alexander, C.R., Nittrouer, C.A., Borgeld, J.C., Wheatcroft, R.A., Leithold, E.L., 2007. Oceanic dispersal and accumulation of river sediment. In: Nittrouer, C.A., Austin, J.A., Field, M.E., Kravitz, J.H., Syvitski, J.P.M., Wiberg, P.L. (eds.). Continental Margin Sedimentation: From Sediment Transport to Sequence Stratigraphy. Blackwell Publishing, Malden, International Association of Sedimentologists (IAS), 37(Special Publication), 157-212.
Stein, R., 1991. Accumulation of organic carbon in marine sediments. Lecture Notes on Earth Science, Universität Giessen, Springer Verlag, 34, 217pp.
Sutherland, R.A., Lee, C.-T., 1994. Discrimination between coastal subenvironments using textural characteristics. Sedimentology, 41, 1133-1145.
Sutherland, T.F., Galloway, J., Loschiavo, R., Levings, C.D., Hare, R., 2007. Calibration techniques and sampling resolution requirements for groundtruthing multibeam acoustic backscatter (EM3000) and QTC VIEWTM classification technology. Estuarine, Coastal and Shelf Science, 75, 447-458.
Tateda, Y., Carvalho, F.P., Fowler, S.W., Miquel, J.-C., 2003. Fractionation of 210Po and 210Pb in coastal waters of the NW Mediterranean continental margin. Continental Shelf Research, 23(3-4), 295-316.
Urgeles, R., Locat, J., Schmitt, T., Hughes-Clarke, J.E., 2002. The July 1996 flood deposit in the Saguenay Fjord, Quebec, Canada: implications for sources of spatial and temporal backscatter variations. Marine Geology, 184, 41-60.
Urgeles, R., De Mol, B., Liquete, C., Canals, M., De Batist, M., Hughes-Clarke, J.E., Arraix Shipboard Party, 2007. Sediment undulations on the Llobregat prodelta: Signs of early slope instability or sedimentary bedforms? Journal of Geophysical Research, 112, B05102.
Visher, G.S., 1969. Grain size distribution and depositional processes. Journal of Sedimentary Petrology, 9, 1074-1106.
Zuo, Z., Eisma, D., Gieles, R., Besks, J., 1997. Accumulation rates and sediment deposition in the Northwestern Mediterranean. DeepSea Research II, 44, 597-609.
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