137Cs and 210Pb transport and geochronologies in urbanized reservoirs with rapidly increasing sedimentation rates

McCall, Peter L.; Robbins, John A.; Matisoff, Gerald

doi:10.1016/0009-2541(84)90066-4

Cited by 94 publications

(45 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pb supply (CRS) model was applied to date the sediment cores to obtain sediment flux over time (McCall et al, 1984).…”

Section: Discussionmentioning

confidence: 99%

“…In order to construct a reliable 210 Pb chronology, a suitable model should be applied to process the 210 Pb accumulation data. In the constant initial 210 Pb concentration (CIC) model, the sediment core is dated by an average sedimentation rate and an average sedimentation flux (McCall et al, 1984;Zhang et al, 1999). The constant rate of 210 Pb supply (CRS) model assumes that over the time of the sedimentation there has been a constant flux of unsupported 210 Pb (derived from 222 Rn in the atmosphere and rapidly decaying to 210 Pb) to the sediments and the specific activity of 210 Pb in the sediments varies exponentially with the cumulative dry-mass of the sediment (McCall et al, 1984;Oldfield and Appleby, 1984;Towler and Smith, 2000).…”

Section: Pb Dating and Sedimentation Ratesmentioning

confidence: 99%

“…In the constant initial 210 Pb concentration (CIC) model, the sediment core is dated by an average sedimentation rate and an average sedimentation flux (McCall et al, 1984;Zhang et al, 1999). The constant rate of 210 Pb supply (CRS) model assumes that over the time of the sedimentation there has been a constant flux of unsupported 210 Pb (derived from 222 Rn in the atmosphere and rapidly decaying to 210 Pb) to the sediments and the specific activity of 210 Pb in the sediments varies exponentially with the cumulative dry-mass of the sediment (McCall et al, 1984;Oldfield and Appleby, 1984;Towler and Smith, 2000). The CRS model is suitable for a system where the transfer of 210 Pb to sediments is very efficient, such as large water bodies with long hydraulic retention times or for a system where the 210 Pb supply comes directly from atmospheric deposition (Appleby et al, 1979;McCall et al, 1984;Ugur and Yener, 2001).…”

Section: Pb Dating and Sedimentation Ratesmentioning

confidence: 99%

“…The CIC model, on the other hand, is appropriate for a system where the 210 Pb supply is directly proportional to erosive inputs (e.g. erosion of surface materials) (McCall et al, 1984;Appleby and Oldfield, 1992). Dramatic environmental changes have taken place over the past 50 years in the PRD region.…”

Section: Pb Dating and Sedimentation Ratesmentioning

confidence: 99%

See 3 more Smart Citations

Over one hundred years of trace metal fluxes in the sediments of the Pearl River Estuary, South China

Zhang

et al. 2004

Environmental Pollution

150

View full text Add to dashboard Cite

The rapid economic development in the Pearl River Delta (PRD) region in south China in the last three decades has had a significant impact on the local environment.Estuarine sediment is a major sink for contaminants and nutrients in the surrounding ecosystem. The accumulation of trace metals in sediments may cause serious environmental problems in the aquatic system. Thirty sediment cores were collected in the Pearl River Estuary (PRE) in 2000 for a study on trace metal pollution in this region. Heavy metal concentrations and Pb isotopic compositions in the four 210 Pb-dated sediment cores were determined to assess the fluxes in metal deposits over the last one hundred years. The concentrations of Cu, Pb and Zn in the surface sediment layers were generally elevated when compared with the sub-surface layers. There has been a significant increase in inputs of Cu, Pb and Zn in the PRE since the 1970s. The results also showed that different sampling locations in the estuary received slightly different types of inputs. Pb isotopic composition data indicated that the increased Pb in the recent sediments was of anthropogenic origin. The * Corresponding author (X.D. Li), email: cexdli@polyu.edu.hk; fax: (852) 2334 6389; tel: (852) 2766 6041 This is the Pre-Published Version.2 results of trace metal influxes showed that about 30% of total Pb and 15% of total Zn in the sediments in the 1990s were from anthropogenic sources. The combination of trace metal analysis, Pb isotopic composition and 210 Pb dating in an estuary can provide vital information on the long-term accumulation of metals in sediments.

show abstract

“…Pb supply (CRS) model was applied to date the sediment cores to obtain sediment flux over time (McCall et al, 1984).…”

Section: Discussionmentioning

confidence: 99%

Section: Pb Dating and Sedimentation Ratesmentioning

confidence: 99%

Section: Pb Dating and Sedimentation Ratesmentioning

confidence: 99%

Section: Pb Dating and Sedimentation Ratesmentioning

confidence: 99%

See 2 more Smart Citations

Over one hundred years of trace metal fluxes in the sediments of the Pearl River Estuary, South China

Zhang

et al. 2004

Environmental Pollution

150

View full text Add to dashboard Cite

show abstract

“…As the core did not reach the critical depth of excessive 210 Pb/0, only a Constant Initial 210 Pb Concentration (CIC) model was used, which assumes that dry mass entering the sediment pool has the same radioactivity concentration, to give an average sedimentation rate. Sedimentation age was calculated using a constant flux (CF) model (McCall et al, 1984),…”

Section: Sediment Datingmentioning

confidence: 99%

Polycyclic aromatic hydrocarbons (PAHs) in the water column and sediment core of Deep Bay, South China

Qiu

Zhang

Liu

et al. 2009

Estuarine, Coastal and Shelf Science

153

View full text Add to dashboard Cite

Use of magnetic and radiometric measurements to investigate erosion and sedimentation in a British upland catchment

Hutchinson

1995

Earth Surf Processes Landf

View full text Add to dashboard Cite

In response to the potential shortcomin s of sin le technique strategies in the investigation oferosion and sedimentation, a of Howden Reservoir, Derbyshire. By combining these techniques, some assessment of sediment sources and the erosion status of the catchment has been achieved. Alone, each approach would have been unable to determine unequivocally sediment provenance. Furthermore, the parallel use of these measurements has highlighted limitations and/or uncertainties in both the magnetic and I3'Cs techniques. These problems reflect the particular soil characteristics and drainage conditions of this upland catchment. Despite the documented severity of peat erosion in the region, Howden Reservoir has a mixture of sediment sources and a relatively moderate rate of sedimentation. Sediment yields (total 127.7 t km-* yr-' including organic fraction 31.3 t km-2 yr-') are, however, higher than in other British upland areas. combined magnetic and radiometric ( 1 8 Cs and*"Pb) approach has been undertaken in the upland, watershed-lake system

show abstract

137Cs and 210Pb transport and geochronologies in urbanized reservoirs with rapidly increasing sedimentation rates

Cited by 94 publications

References 10 publications

Over one hundred years of trace metal fluxes in the sediments of the Pearl River Estuary, South China

Over one hundred years of trace metal fluxes in the sediments of the Pearl River Estuary, South China

Polycyclic aromatic hydrocarbons (PAHs) in the water column and sediment core of Deep Bay, South China

Use of magnetic and radiometric measurements to investigate erosion and sedimentation in a British upland catchment

Contact Info

Product

Resources

About