Geological record of extreme floods and anthropogenic impacts on an industrialised bay: the inner Abra of Bilbao (northern Spain)
| Autor: | José Gómez-Arozamena, Ana Carolina Ruiz-Fernández, Joan-Albert Sanchez-Cabeza, Alejandro Cearreta, Humberto Serrano, María Jesús Irabien |
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| Přispěvatelé: | Universidad de Cantabria |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
Environmental Engineering
010504 meteorology & atmospheric sciences metals benthic foraminifera 010501 environmental sciences Geologic record 01 natural sciences Natural (archaeology) Foraminifera Extreme weather Environmental Chemistry Waste Management and Disposal radionuclides 0105 earth and related environmental sciences geography geography.geographical_feature_category biology sedimentary record environmental improvement Sediment Estuary biology.organism_classification Pollution extreme floods Oceanography Benthic zone Environmental science Bay |
| Zdroj: | Addi. Archivo Digital para la Docencia y la Investigación instname Sci Total Environ, 696, 133946 2019 Dec 15 UCrea Repositorio Abierto de la Universidad de Cantabria Universidad de Cantabria (UC) |
| Popis: | The Bilbao estuary is one of themost polluted areas on the northern coast of Spain, owing to the direct disposal of urban effluents and wastewaters frommining and industrial activities that has occurred during the last 170 years. Recent sediment records collected fromthe inner Abra of Bilbao baywere examined using amultidisciplinary approach including geochemical,micropaleontological and isotopic proxies to evaluate heavy metal contamination (Pb, Zn and Cd), ecological condition (benthic foraminifera), and sediment accumulation variability (210Pb). Results evidenced the interplay of both human activities and extremeweather events.Most contaminatedmaterials are buried belowa thin layer (1?21 cm) of cleaner sedimentswhich have been deposited since contaminant discharges have substantially decreased, due to industrial reconversion and environmental regulations. However, the fingerprint left in the sedimentary record by the catastrophic floods of 1983 confirms the potential of natural events for sediment relocation, showing catastrophic eventsmay endanger recently-achieved environmental improvements in historically contaminated coastal areas. Acknowledgements: This research was funded by Spanish MINECO (CGL2013-41083-P), UPV/EHU (UFI11/09) and EJ/GV (IT976-16) projects. Microfossil samples of cores Abra1, Abra4 and Abra6 were prepared and analyzed initially by I. Kortabitarte and A. González-Lanchas. L.H. Pérez-Bernal (UNAM) contributed to 210Pb and sediment characterization analyses. This is contribution 48 of the Geo-Q Zentroa Research Unit (Joaquín Gómez de Llarena Laboratory). |
| Databáze: | OpenAIRE |
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