Sedimentation Rate and 210Pb Sediment Dating at Apipucos Reservoir, Recife, Brazil

Souza, Vivianne Lúcia Bormann de; Rodrigues, Kélia R. G.; Pedroza, Eryka H.; Melo, Roberto Terraza; Lima, Vanessa L. de; Hazin, C.A.; Almeida, Mayara G. O. de; Nascimento, Rízia K. do

doi:10.3390/su4102419

Cited by 16 publications

(4 citation statements)

References 8 publications

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“…This occurred especially as regards agricultural uses in the 1950s and 1960s (IPA, 2008). As it had been previously mentioned, the reservoir's construction was completed in 1936, and a difference of 10 years is admissible for the dating method used in this study (Souza et al, 2012). Thereby, the estimated age of the dam is compatible with the original construction of the reservoir and its correlation with the agronomic history of the area.…”

Section: Sedimentation Ratesmentioning

confidence: 69%

Method of 210Pb geochronological to estimate sedimentation rate in water reservoir in the Brazilian semiarid region

Ferreira¹,

Araújo²,

Júnior³

et al. 2023

J. Env. Anal. Progr.

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Dams are important reservoirs in semiarid regions providing the needs of the population and agricultural activities in an area in which intermittent rivers predominate. These reservoirs are subject to erosion processes that can cause sedimentation and affect the quality of the water in them. The method of dating sediments using 210Pb is well known and is used to establish a precise chronology of the sediments in places where abrupt changes in sedimentation conditions do not occur. The work aims to determine the sedimentation rate in five main tributary points of the dam located in the semiarid region of the state of Pernambuco, Brazil, using the geochronologic dating of the sediments by measuring 210Pb activity. The method used was the Constant Rate of Supply (CRS) model. Dating coincides with the date of the conclusion of the construction of the dam. The sedimentation rate grew with the increase in depth and presented a decline in both the rate and flow of the sediments over time. The most recent results presented a decrease in sedimentation rates. The greatest occurrence of the sedimentation rate was identified at points located at the entrance of the dam, which could be justified by the reduction in the average speed of final drainage due to the existence of the reservoir itself.

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Section: Sedimentation Ratesmentioning

confidence: 69%

Method of 210Pb geochronological to estimate sedimentation rate in water reservoir in the Brazilian semiarid region

Ferreira¹,

Araújo²,

Júnior³

et al. 2023

J. Env. Anal. Progr.

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“…There is no standard guideline for the optimum thickness of the sediment core section due to some literature indicates that the thickness between 2 and 7 cm has been used. However, the thickness of sediment core with 1 cm does not show very precise results [49]. In the present paper, we intended to maintain an average value of 3 cm for B5, B9 and B13 sediment core thickness.…”

Section: Methodsmentioning

confidence: 96%

The Evaluation of Brunei Bay Sediment Cores Sedimentation Rate Using 210Pb Radiometric Dating Technique

Joseph

Ghazali

Shazili

et al. 2018

IJET

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The use of radioisotopes 210Pb and 226Ra in establishing the geochronology of pollutants in the sediment core and sediment dating is being widely used in the world. The present study was conducted in Brunei Bay region of Malaysian waters to define the sedimentation rate and sediment age as well as to investigate the possible sources of pollutants into this bay. Sediment core samples were cut by layers, dried and analyzed using High Purity Germanium (HPGe) Spectrometer. Results obtained marked the time interval of 1875, 1956, 1962 and 1945 for sediment core B5, B9, B13 and LB consecutively. Sediment core of B9 and LB showed higher sedimentation rate compared to B5 and B13 due to the rapid development of urban and industrial. The increasing of sedimentation rate over the last 25 years was in line with the increasing of human activities surround the bay. Additionally, the health and distribution of mangroves surround Brunei Bay were important to determine the sediment movement which will affect the sedimentation rate in the bay. Overall, by controlling human activities as well as sustaining the mangroves population, could maintain and preserve the natural and unique environment of Brunei Bay.

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“…Compared to other costal zones, estuaries and the Uruguayan continental shelf (de Souza et al, 2012;Martins et al, 2012;Sánchez-Cabeza et al, 2012;de Mahiques et al, 2013;Pérez et al, 2016Pérez et al, , 2017, the sedimentation rate of core BAR1 (see Marrero et al, 2014) displays medium/low values (0.08 cm yr -1 -0.52 cm yr -1 ). This can be explained by the high dynamics of flocculation, convection, erosion, resuspension and transport processes observed in the study area (FREPLATA, 2004;Framiñan et al, 2008;Fossati et al, 2014).…”

Section: Historical Aspects Of Rdlp Sediment Ommentioning

confidence: 93%

Spatial and Temporal Variation in the Present and Historical Sedimentary Organic Matter Within the Río De La Plata Estuary (South America) in Relation to the Salinity/Turbidity Gradient / Variação Espacial E Temporal Presente E Histórica Da Matéria Orgânica Sedimentar No Estuário Do Río De La Plata (América Do Sul) Em Relação Ao Gradiente De Salinidade / Turbidez

et al. 2018

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The aim of this study is to examine sedimentary organic matter sources, spatial distribution and temporal variability in a large estuarine system, the Río de la Plata estuary (South America). For this purpose, this work integrates recent and historical carbon and nitrogen isotopes (δ13C, δ15N), total organic carbon, total nitrogen, C/N ratios and sediment grain size analyses along the Río de la Plata estuary. Principal component analysis based on biogeochemical variables and salinity revealed two main biogeochemical contrasting zones, corresponding to the upper and the lower estuary. Such zones are derived from the density gradient observed at the maximum turbidity zone acting as a physical barrier by trapping fine sediments and controlling primary productivity. As a consequence, sedimentary total organic carbon and total nitrogen increase from upper reaches towards lower reaches to attain maximum values under the turbidity gradient due to the presence of fine sediments. On the other hand, C/N ratios display an opposite trend, with higher values in the upper reaches due to a higher influence of continental organic matter. Moreover, Stable Isotope Analysis in R (SIAR) based on δ13C and δ15N reveals that the main organic matter source to the sediment appears to be the continental particulate organic matter and the estimated percentages of terrestrial allochthonous contribution (C3 plants) indicated a decreased contribution towards the lower reaches. The paleoenvironmental analysis shows a change in the sedimentary organic matter composition since 1970 associated to an increased influence of terrestrial organic matter. This trend is related to an increase in the Paraná River flow, which in turn is related to climatic variability (i.e., the polarity change of the Pacific Decadal Oscillation). ResumoO objetivo deste estudo é estimar fontes de matéria orgânica sedimentar, distribuição espacial e variabilidade temporal num grande sistema estuarino, o estuário do Río de la Plata (América do Sul). Este trabalho integra dados atuais e históricos de isótopos de carbono e nitrogênio (δ13C, δ15N), carbono orgânico total, nitrogênio total, relação C/N e granulometria do sedimento ao longo do estuário do Río de la Plata. A análise de componentes principais baseada em variáveis biogeoquímicas e salinidade revelou duas zonas biogeoquímicas contrastantes, correspondentes ao estuário superior e inferior. Tais zonas são definidas por diferenças no gradiente de densidade na zona de turbidez máxima, o qual atua como uma barreira física, causando o aprisionamento de sedimentos finos e influenciando a produtividade primária. Como conseqüência, o carbono orgânico total sedimentar e o nitrogênio total aumentam dos trechos superiores para os trechos inferiores atingindo valores máximos sob o gradiente de turbidez devido à presença de sedimentos finos. Por outro lado, a razão C/N exibe uma tendência oposta, atingindo valores mais elevados no estuário superior devido a uma maior influência da matéria orgânica continental. Os resultados isotópicos de δ13C e δ15N sugerem que a principal fonte de matéria orgânica para o sedimento é a matéria orgânica particulada continental. A contribuição alóctone terrestre (plantas C3) diminui no estuário inferior. A análise paleoambiental mostra uma mudança na composição da matéria orgânica sedimentar a partir de 1970, causada pelo aumento do fornecimento da matéria orgânica terrestre. Essa tendência está relacionada a um aumento no fluxo do Rio Paraná, na sequência de alterações climáticas relacionadas com a mudança de polaridade da Oscilação Decadal do Pacífico.

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Sedimentation Rate and 210Pb Sediment Dating at Apipucos Reservoir, Recife, Brazil

Cited by 16 publications

References 8 publications

Method of 210Pb geochronological to estimate sedimentation rate in water reservoir in the Brazilian semiarid region

Method of 210Pb geochronological to estimate sedimentation rate in water reservoir in the Brazilian semiarid region

The Evaluation of Brunei Bay Sediment Cores Sedimentation Rate Using 210Pb Radiometric Dating Technique

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