This paper will evaluate the depth distribution of Cs 137 in soils and near-shore dune sands of Pinery Provincial Park, Ontario, in order to relate soil properties to the Cs 137 distribution as well as to investigate the possibility of using the Cs
The evaluation of the pluvial erosion - accumulation processes in two model territories on ploughed slopes in the region of hilly relief of Považské podolie, near the villages of Horné Srnie and Lúborča. It was used the Cs-137 method based
Validating the use of Cs 137 measurements to estimate rates of soil redistribution by wind
Cultivated land ; Erosion rate ; Geochemistry ; Grain size distribution ; Isotope analysis ; Model ; Semi-arid area ; Soil erosion ; Texas ; United States of America ; Wind erosion
The AA. investigated the partitioning of Cs 137 in wind-eroded sediments and with soil surface samples sieved into contiguous ranges of particle sizes. They also compared the Cs 137 activities and stratification of several adjacent soils with known
wind erosion and deposition histories. Finally, they tested Cs-based soil loss models with measured data from sites with document histories. Good agreement between model estimations and measured data indicated that Cs 137 models developed to estimate
A method for dating pollution by means of Cs fallout from nuclear explosions into the sediment has been tested in three lakes of western Switzerland. The method involves determining the sedimentation rate in grams of dry sediment per surface unit
The effects of grain abrasion and disaggregation on 137 Cs concentrations in different size fractions of soils developed on three different rock types
Australia ; Erosion ; Geochemistry ; Grain size distribution ; Isotope analysis ; Sediment transport ; Sedimentology ; Tracer ; Victoria ; Watershed
of disaggregation and grain abrasion on the distribution of 137 Cs with respect to particle size fractions were studied in soils derived from the 3 different rock types of the Tarago catchment.
The limitations of using Cs 137 for estimating soil redistribution in semi-arid environments
Arid area ; Isotope analysis ; Krigeage ; Niger ; Sampling ; Semi-arid area ; Soil erosion
Using a study conducted in southwest Niger the aim here is to illustrate the difficulty in satisfying the assumptions for using the Cs 137 technique to estimate net soil flux, and to demonstrate that these assumptions may be satisfied to overcome
Cs 137 dating of lacustrine sediments and human impacts on Dalian Lake, Qinghai Province, China
Aeolian features ; China ; Environment ; Grain size distribution ; Human impact ; Isotope analysis ; Lacustrine sedimentation ; Lake ; Qinghai ; Sedimentation rate ; Wind erosion
Here the AA. report the preliminary results of Cs 137 measurements on the lacustrine sediments of Dalian Lake, Qinghai Province, China. The objectives were to determine sediment accumulation rates and trace environmental changes in the surrounding
by the simultaneous determination of anthropogenic Cs-137. There is only limited discussion as how to explain the unsupported Pb-210 and Cs-137 activities within a geomorphological frame.
This paper reviews the basis for using fallout Cs 137 measurements of floodplain sediment samples to study rates and patterns of overbank sediment deposition on floodplains. The processes involved in the incorporation of Cs 137 into overbank
floodplain sediments will be discussed, and the primary factors influencing the distribution of Cs 137 in the sediment will be examined. The results obtained from a case study of a floodplain reach of the River Stour, Dorset, UK, will be used to illustrate
Ecosystem ; Isotope analysis ; Kansas ; Meadow ; Overland flow ; Sediment transport ; Slope gradient ; Soil erosion ; United States of America ; Watershed
Here, the AA. use Cs 137 to characterize and quantify soil erosion at the Konza Prairie Long-Term Ecological Research (LTER) site, an undisturbed grassland in northeastern Kansas. Their goals are to quantify the small-scale variability of Cs 137
in soils and to ascertain if basin-scale variability exceeds small-scale variability. In addition, they test whether topographical attributes such as slope, curvature, and upslope contributing area are related to Cs 137 inventories, and use
Arid area ; Australia ; Bank erosion ; Braided channel ; Floodplain ; Gully erosion ; Inventory ; Isotope analysis ; Queensland ; Sedimentation ; Semi-arid area ; Watershed
This study assesses the utility of Cs 137 inventory and depth-profile techniques for determining relative amounts of floodplain sedimentation in the Fitzroy River, northeastern Australia, a semi-arid river system. Caesium-137 inventories were
calculated for foodplain and reference location bulk soil cores collected from 4 sites. Depth profiles of Cs 137 concentration from each floodplain site and a reference location were recorded. The similarity between floodplain and reference bulk inventories
does not necessarily indicate a lack of erosion or deposition, due to low Cs 137 fallout in the region and associated high measurements uncertainties, and a likely influence of gully and bank eroded sediments with no or limited adsorbed Cs 137
. In this low-fallout environment, detailed depth-profile data are necessary for investigating sedimentation using Cs 137.
Sediment accumulation of Dianchi Lake determined by Cs 137 dating
China ; Geographical information system ; Isotope analysis ; Lake ; Plateau ; Qinghai ; Sedimentation rate ; Tibet ; Water quality
To identify the internal pollution load of Dianchi Lake it is necessary to evaluate its sediment accumulation. Sedimentation rates of Dianchi Lake are determined by Cs 137 dating. However, Cs 137 vertical distribution in sediment cores of Dianchi
sediment accumulation of Dianchi Lake by using the Cs 137 dating method and the technique of Geographical Information Systems (GIS)
Agricultural practice ; Cultivated land ; Erosion rate ; Iowa ; Isotope analysis ; Model ; Soil erosion ; United States of America ; Watershed
Soil erosion rates at the National Soil Tilth Laboratory Deep Loess Research Station, near Treynor, southwest Iowa, were determined from Cs 137 inventories using a multi-box numerical model that incorporates time-dependent atmospheric Cs 137
deposition. Nine sites along a downslope transect where Cs 137 inventories were measured in 1974 by Spomer et al. were revisited in 1998, allowing estimation of erosion over 3 time periods : 1954-1974, 1954-1998 and 1974-1998. The results permit comparison
of erosion rates over these 3 periods, to assess the effects of changes in soil conservation practices. The AA. introduce a model that accounts for time-dependent Cs 137 fallout, precipitation and soil cultivation.
A preliminary investigation of the integration of modelled floodplain hydraulics with estimates of overbank floodplain sedimentation derived from Pb-210 and Cs-137 measurements
Dating ; Devon ; England ; Flood ; Floodplain ; Fluvial dynamics ; Isotope analysis ; Model ; Runoff ; Sediment transport ; Sedimentology ; Stream ; United Kingdom
spatial heterogeneity in rock fragment content. Cs 137 measurements were used to quantify fine-earth contamination of dry-sieved and washed rock fragments because they are nondestructive and allowed for repeated analysis of the same sample. The Cs 137
During a palaeoflood study of the Llobregat River in Catalonia, analysis of Cs 137 was carried out on slackwater flood deposits to obtain an improved flood chronology for the most recent flood sediments. The onset of measured caesium activity
estimates associated with the flood deposits, Cs 137 analysis and the instrumental peak discharge series, it was possible to identify the particular flood events responsible for the majority of the slackwater flood units.
England ; Floodplain ; Geochemistry ; Grain size distribution ; Isotope analysis ; Microrelief ; Sediment transport ; Sedimentation ; Spatial variation ; Stream ; United Kingdom
The study reported uses Cs 137 measurements on sediment cores to investigate the spatial variability of sediment deposition on selected floodplain reaches of five British lowland rivers. Attention is given both to the overall reach and to more
Fallout 137 Cs as a tracer for soil mobility in the landscape framework of the Belgian loamy region
137 Cs ; Argile ; Belgique ; Erosion des sols ; Géochimie ; Géographie physique ; Loess ; Sol ; Technique de recherche ; Traceur
Thanks to its strong adsorption on clay minerals horizontal redistribution of fallout 137 Cs can be related to soil movement. The technique was tested in a study on the effectivity of semi-natural benches in erosion retardation and colluviation
England ; Floodplain ; Fluvial processes ; Geochemistry ; Geochronology ; Isotope ; Model ; Palaeogeography ; Tracer ; United Kingdom ; Watershed
The geochemical record preserved in overbank floodplain deposits is used in combination with a composite fingerprinting technique and the chronology provided by Cs 137 dateable horizons, to reconstruct recent changes in sediment sources in the Exe
Catastrophe ; Chernobyl ; Contamination ; European part of Russia ; Isotope ; Ladoga Lake ; Lake ; Nuclear power station ; Pollution ; Radioactive pollution ; Spatial distribution
Etude de l’état radioactif du lac Ladoga. Lors de l’observation du système montagneux alpin, pollué par Cs 137 suite à l’accident de la centrale nucléaire de Tchernobyl, les AA. analysent les caractéristiques de la contamination des lacs et les