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Application of Geochemical Tracers to Fluvial Sediment

Series: SpringerBriefs in Earth Sciences

By: Jerry R Miller (Author), Gail Mackin (Author), Suzanne M Orbock Miller (Author)

120 pages, 43 colour illustrations

Springer-Verlag

Paperback | Jan 2015 | #220455 | ISBN-13: 9783319132204
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NHBS Price: £44.27 $56/€52 approx

About this book

Application of Geochemical Tracers to Fluvial Sediment takes an in-depth look at the theory and methods inherent in the tracing of riverine sediments. Examined tracers include multi-elemental concentration data, fallout radionuclides (e.g., 210Pb, 137Cs, 7Be), radiogenic isotopes (particularly those of Pb, Sr, and Nd), and novel ("non-traditional") stable isotopes (e.g., Cd, Cu, Hg, and Zn), the latter of which owe their application to recent advances in analytical chemistry. The intended goal is not to replace more 'traditional' analyses of the riverine sediment system, but to show how tracer/fingerprinting studies can be used to gain insights into system functions that would not otherwise be possible. The text, then, provides researchers and catchment managers with a summary of the strengths and limitations of the examined techniques in terms of their temporal and spatial resolution, data requirements, and the uncertainties in the generated results.

The use of environmental tracers has increased significantly during the past decade because it has become clear that documentation of sediment and sediment-associated contaminant provenance and dispersal is essential to mitigate their potentially harmful effects on aquatic ecosystems. Moreover, the use of monitoring programs to determine the source of sediments to a water body has proven to be a costly, labor intensive, long-term process with a spatial resolution that is limited by the number of monitoring sites that can be effectively maintained. Alternative approaches, including the identification and analysis of eroded upland areas and the use of distributed modeling routines also have proven problematic. The application of tracers within riverine environments has evolved such that they focus on sediments from two general sources: upland areas and specific, localized, anthropogenic point sources. Of particular importance to the former is the development of geochemical fingerprinting methods that quantify sediment provenance (and to a much lesser degree, sediment-associated contaminants) at the catchment scale. These methods have largely developed independently of the use of tracers to document the source and dispersal pathways of contaminated particles from point-sources of anthropogenic pollution at the reach- to river corridor-scale. Future studies are likely to begin merging the strengths of both approaches while relying on multiple tracer types to address management and regulatory issues, particularly within the context of the rapidly developing field of environmental forensics.


Contents

1 Introduction
1.1 Tracers, Fingerprints, and Riverine Sediments
1.2 Book Format and Overview
References

2 Geochemical Fingerprinting
2.1 Introduction
2.2 Conceptual Model and Inherent Assumptions
2.3 Methodological Approach
2.3.1 Source Delineation
2.3.2 Collection and Characterization of River Sediment
2.3.3 Identifying Effective Geochemical Fingerprints
2.3.4 Inverse/Unmixing Models
2.4 Applications
2.5 Use of Geochemical Fingerprinting as a Management Tool
References

3 Fallout Radionuclides
3.1 Introduction
3.2 Lead-210, Cesium-137 and Beryllium-7: General Characteristics
3.3 Applications
3.3.1 Use as a Geochemical Tracer to Determine Sediment Provenance
3.3.2 Determination of Sediment Redistribution and Erosion Rates
3.4 Estimating Sedimentation Processes
3.5 Use of Fallout Radionuclides as an Age Dating Tool
References

4 Radiogenic Isotopes
4.1 Introduction
4.2 Sr and Nd Isotopic Systems
4.2.1 Tracing Sediments and Other Geological Materials
4.2.2 Tracing Contaminated Particles
4.3 Pb Isotopes
4.3.1 General Characteristics
|4.3.2 Applying Pb Isotopes as a Tracer in Riverine Environments
4.4 Summary and Management Implications
References

5 Stable ‘Non-Traditional’ Isotopes
5.1 Introduction
5.2 Zn and Cd Isotopes
5.2.1 Use of Zn Isotopes as Contaminated Sediment Tracers
5.2.2 Use of Cd Isotopes as Contaminated Sediment Tracers
5.3 Copper Isotopes
5.4 Mercury Isotopes
5.5 Summary and Management Implications
References

Appendix A. Abbreviations, Unit Conversions, and Elemental Data

 


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