Upscaling the Use of Fallout Radionuclides in Soil Erosion and Sediment Budget Investigations: Addressing the Challenge

Abstract The application of fallout radionuclides in soil erosion investigations and related sediment budget studies has provided a widely used tool for improving understanding of soil erosion and sediment transfer processes. However, most studies using fallout radionuclides undertaken to date have focussed on small areas. This focus on small areas reflects both the issues addressed and practical constraints associated with sample collection and analysis. Increasing acceptance of the important role of fine sediment in degrading aquatic habitats and in the transfer and fate of nutrients and contaminants within terrestrial and fluvial systems has emphasised the need to consider larger areas and the catchment or regional scale. The need to upscale existing approaches to the use of fallout radionuclides to larger areas represents an important challenge. This contribution provides a brief review of existing and potential approaches to upscaling the use of fallout radionuclides and presents two examples where such approaches have been successfully applied. These involve a national scale assessment of soil erosion rates in England and Wales based on 137 Cs measurements and an investigation of the sediment budgets of three small/intermediate-size catchments in southern Italy.

[1]  W. Salomons,et al.  Fine‐grained sediment in river systems: environmental significance and management issues , 2005 .

[2]  Paul S. Kemp,et al.  The impacts of fine sediment on riverine fish , 2011 .

[3]  D. Walling,et al.  Conversion Models for Use in Soil-Erosion, Soil-Redistribution and Sedimentation Investigations , 2002 .

[4]  D. Walling,et al.  An investigation of soil erosion and redistribution in a Mediterranean lowland agricultural catchment using caesium-137. , 2010 .

[5]  D. Walling,et al.  Morphological controls on medium-term sedimentation rates on British lowland river floodplains , 2003 .

[6]  L. Mabit,et al.  Assessment of erosion in the Boyer River watershed (Canada) using a GIS oriented sampling strategy and 137Cs measurements , 2007 .

[7]  D. Walling,et al.  Use of Fallout Pb-210 Measurements to Investigate Longer-Term Rates and Patterns of Overbank Sediment Deposition on the Floodplains of Lowland Rivers , 1996 .

[8]  A. Chappell.  Using remote sensing and geostatistics to map137Cs-derived net soil flux in south-west Niger , 1998 .

[9]  V. Golosov.  Special Considerations for Areas Affected by Chernobyl Fallout , 2002 .

[10]  Desmond E. Walling,et al.  Improved Models for Estimating Soil Erosion Rates from Cesium‐137 Measurements , 1999 .

[11]  Yanglin Wang,et al.  Applicability study of using in-situ gamma-ray spectrometry technique for 137Cs and 210Pb(ex) inventories measurement in grassland environments. , 2010, Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine.

[12]  Anthony J. Parsons,et al.  What can we learn about soil erosion from the use of 137Cs , 2011 .

[13]  K. Meusburger,et al.  Suitability of 239+240Pu and 137Cs as tracers for soil erosion assessment in mountain grasslands. , 2014, Chemosphere.

[14]  P. Schuller,et al.  Use of 137Cs to estimate tillage- and water-induced soil redistribution rates on agricultural land under different use and management in central-south Chile , 2003 .

[15]  D. Walling,et al.  A suspended sediment budget for the agricultural Can Revull catchment (Mallorca, Spain) , 2012 .

[16]  V. Golosov,et al.  Combining direct observations, modelling, and 137Cs tracer for evaluating individual event contribution to long-term sediment budgets. , 2008 .

[17]  F. Zapata,et al.  Handbook for the assessment of soil erosion and sedimentation using environmental radionuclides , 2003 .

[18]  P. Armitage,et al.  Biological Effects of Fine Sediment in the Lotic Environment , 1997, Environmental management.

[19]  R. Loughran.  The measurement of soil erosion , 1989 .

[20]  D. Walling,et al.  Comparative advantages and limitations of the fallout radionuclides (137)Cs, (210)Pb(ex) and (7)Be for assessing soil erosion and sedimentation. , 2008, Journal of environmental radioactivity.

[21]  James C. Bathurst,et al.  Use of caesium‐137 data to evaluate SHETRAN simulated long‐term erosion patterns in arable lands , 2004 .

[22]  D. Walling,et al.  Use of fallout 137Cs in investigations of overbank sediment deposition on river floodplains , 1997 .

[23]  D. Walling,et al.  Changes in soil erosion associated with the shift from conventional tillage to a no-tillage system, documented using 137Cs measurements , 2007 .

[24]  D. Walling.  Beryllium‐7: The Cinderella of fallout radionuclide sediment tracers? , 2013 .

[25]  D. Walling,et al.  Integrated assessment of catchment suspended sediment budgets: a Zambian example , 2001 .

[26]  D. Walling,et al.  Using ²¹⁰Pb measurements to estimate sedimentation rates on river floodplains. , 2012, Journal of environmental radioactivity.

[27]  Desmond E. Walling,et al.  Suspended sediment sources in British rivers , 2005 .

[28]  M. Nguyen,et al.  Chapter 7 Soil Erosion and Sedimentation Studies Using Environmental Radionuclides , 2009 .

[29]  Desmond E. Walling,et al.  Sediment Source Fingerprinting (Tracing) and Sediment Budgets as Tools in Targeting River and Watershed Restoration Programs , 2013 .

[30]  R. Bartley,et al.  Plutonium as a tracer of soil and sediment movement in the Herbert River, Australia , 2010 .

[31]  R. Loughran,et al.  A Survey of Soil Erosion in Australia using Caesium‐137 , 2004 .

[32]  D. Walling,et al.  Use of a (137)Cs re-sampling technique to investigate temporal changes in soil erosion and sediment mobilisation for a small forested catchment in southern Italy. , 2014, Journal of environmental radioactivity.

[33]  D. Walling,et al.  Testing distributed soil erosion and sediment delivery models using 137Cs measurements , 2003 .

[34]  D. E. Walling,et al.  A national assessment of soil erosion based on caesium-137 measurements. , 2010 .

[35]  Andrew Parker,et al.  Pesticides and other micro-organic contaminants in freshwater sedimentary environments—a review , 2003 .

[36]  W. E. Galloway,et al.  Reply to the comments of W. Helland-Hansen on "Towards the standardization of sequence stratigraphy" by Catuneanu et al. (Earth-Sciences Review 92(2009)1-33) , 2009 .

[37]  L. K. Fifield,et al.  Applicability of 239Pu as a tracer for soil erosion in the wet-dry tropics of northern Australia , 2013 .

[38]  D. Walling,et al.  Relating caesium-137 and soil loss from cultivated land , 2003 .

[39]  D. Walling,et al.  Extending the timescale for using beryllium 7 measurements to document soil redistribution by erosion , 2009 .

[40]  D. Walling,et al.  Using 137Cs and 210Pbex measurements to investigate the sediment budget of a small forested catchment in southern Italy , 2013 .

[41]  D. Walling.  The sediment delivery problem , 1983 .

[42]  D. Walling,et al.  The catchment sediment budget as a management tool , 2008 .

[43]  D. Walling,et al.  New strategies for upscaling high-resolution flow and overbank sedimentation models to quantify floodplain sediment storage at the catchment scale , 2006 .

[44]  D. Walling,et al.  Using caesium-137 and unsupported lead-210 measurements to explore the relationship between sediment mobilisation, sediment delivery and sediment yield for a Calabrian catchment , 2009 .

[45]  P. J. Whiting,et al.  Measuring Soil Erosion Rates Using Natural ( 7 Be, 210 Pb) and Anthropogenic ( 137 Cs, 239,240 Pu) Radionuclides , 2012 .

[46]  D. Walling,et al.  The role of channel and floodplain storage in the suspended sediment budget of the River Ouse, Yorkshire, UK , 1998 .

[47]  Thomas F. Waters,et al.  Sediment in streams: Sources, biological effects, and control , 1995 .

[48]  R. Loughran,et al.  Rates of soil erosion in Australia determined by the caesium-137 technique: a national reconnaissance survey , 1996 .

[49]  D. Walling,et al.  Establishing sediment budgets for two small lowland agricultural catchments in the UK , 2002 .

[50]  A. Chappell,et al.  Spatial scales of 137Cs-derived soil flux by wind in a 25 km2 arable area of eastern England , 2003 .

[51]  D. Walling,et al.  Fallout 210Pb as a soil and sediment tracer in catchment sediment budget investigations: A review , 2014 .

[52]  36. Predicting Slope – Channel Connectivity: A National-Scale Approach , 2005 .

[53]  D. Walling,et al.  Validating erosion rate estimates provided by caesium‐137 measurements for two small forested catchments in Calabria, southern Italy , 2003 .

[54]  R. J. Rickson,et al.  Conserving soil resources: European perspectives. , 1994 .

[55]  Richard E. Brazier,et al.  Quantifying soil erosion by water in the UK: a review of monitoring and modelling approaches , 2004 .

[56]  D. Walling,et al.  Using 137Cs measurements to establish catchment sediment budgets and explore scale effects , 2011 .

[57]  D. Walling,et al.  Establishing fine-grained sediment budgets for the Pang and Lambourn LOCAR catchments, UK , 2006 .

[58]  Adrian Chappell,et al.  Spatial uncertainty of 137Cs‐derived net (1950s–1990) soil redistribution for Australia , 2011 .

[59]  D. Walling,et al.  Using Fallout Lead‐210 Measurements to Estimate Soil Erosion on Cultivated Land , 1999 .

[60]  K. Meusburger,et al.  The usefulness of 137Cs as a tracer for soil erosion assessment: A critical reply to Parsons and Foster (2011) , 2013 .

[61]  R. Shakesby,et al.  Deriving hillslope sediment budgets in wildfire-affected forests using fallout radionuclide tracers , 2009 .

[62]  D. Walling,et al.  Validating the ANSWERS soil erosion model using 137Cs. , 1994 .

[63]  D. Walling,et al.  Calibration of a field-portable gamma detector to obtain in situ measurements of the 137Cs inventories of cultivated soils and floodplain sediments. , 2000, Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine.

[64]  D. Walling,et al.  Application of a field-portable scintillation detector for studying the distribution of 137Cs inventories in a small basin in central Russia. , 2000 .