cesium 137 redistribution

Spatial analysis and modeling of cesium-137 redistribution ...

fate of the redistribution of many soil particles in the landscape. Therefore, Cs-137 is a unique tracer for studying soil erosion and sedimentation. Numerous studies of the behavior of Cs-137 by fallout from nuclear test have shown its uniqueness for investigation of soil erosion and sedimentation. Global Cs-137 fallout was successfully

Using Cesium-137 to estimate soil particle redistribution ...

Using Cesium-137 to estimate soil particle redistribution by wind in an arid region of central Iran . By ... (TN) and particle size distributions indicated that soil redistribution by wind erosion might have modified the soil properties along the studied transect. A multiple linear regression model was developed for estimating 137Cs by ...

Using Cesium-137 to estimate soil particle redistribution ...

Using Cesium-137 to estimate soil particle redistribution by wind in an arid region of central Iran Fatemeh Gheysari a, Shamsollah Ayoubi a, *, Mohammad Reza Abdi b a Department of Soil Science, College of Agriculture, Isfahan University of Technology, Isfahan, Iran b Department of Physics, Faculty of Science, University of Isfahan, Isfahan, Iran

Quantification of soil redistribution and sediment budget ...

In this study, caesium-137 (137Cs) was used to investigate the spatial extent and severity of soil erosion for an 80-ha watershed in Southeastern Quebec (cultivated area = 75 ha). Soil samples were col-lected based on a 25 × 30 m grid and revealed soil redistribution rates ranging from –20 to +12 Mg ha–1 yr–1. From radiocaesium

137 Cs Redistribution in Thin Stony Soil of a Carbonate ...

The fallout radionuclide cesium-137 (137 Cs) has been widely employed as a tracer for assessment of soil loss from thick uniform soils; however, few studies have been conducted on thin stony soils on slopes underlain by carbonate rocks which are widely distributed in karst areas.Information derived from 137 Cs measurement of soil samples collected along a carbonate rock slope with thin stony ...

Validating a Basic Assumption of Using Cesium‐137 Method ...

Therefore, the abundance of 137 Cs cannot be used to estimate soil redistribution where gully erosion is severe. However, after calibration, the inter‐gully soil loss was consistently related to 137 Cs abundance, which means that the 137 Cs technique can be used at the plot or slope scale on the Loess Plateau. Our results also reveal the ...

Cesium (Cs)-137 in Erosion and Deposition Analysis []

Cs-137 is distributed primarily by rainfall, and is readily absorbed by soil. Cesium-137 decays to barium-137 which then decays to a non-radioactive form of barium. Cs-137 has a half-life of 30.17 years. The measure of Cs-137 concentration is the SI unit of radioactivity, the Becquerel (Bq) per kg or m 2.

The use of caesium-137 measurements in soil erosion surveys

(b) Rapid adsorption of caesium-137 fallout onto soil particles. (c) Subsequent redistribution of caesium-137 reflects sediment movement. (d) Estimates of rates of soil loss can be derived from measurements of soil caesium-137 inventories. FIG. 1 Locations where caesium-137 has been successfully used in soil erosion

Application of caesium (cesium) -137 in soil erosion and ...

What is caesium-137? As the expression indicated, caesium-137, cesium-137, or Cs-137 is one of radioisotopes of caesium with a nominal atomic mass of 137. It is an artificial radionuclide with a half-life of 30 years or so, which was released into the stratosphere by the testing of above ground thermonuclear weapons in the late 1950s and early 1960s and deposited as fallout.

Soil redistribution rate and its relationship with soil ...

The spatial pattern of soil redistribution rate was investigated using cesium-137 ((137)Cs) within a cultivated complex hillslope in western Iran. The relationship between soil redistribution rate and soil organic carbon and total nitrogen pattern were studied using co-regionalization analysis. Ninety-one soil cores were sampled for (137)Cs, total nitrogen, and soil organic carbon measurements.

Spatial Distribution of Caesium-137 | SpringerLink

Conclusion. It has been shown that 137 Cs inventories have a coefficient of variation of approximately 20% at reference sites (Pennock, 2000), and that this variability is probably because of random spatial variability (Owens and Walling, 1996). At reference sites it is recommended that a grid-sampling network is employed, with the collection of three replicate cores within 1 m of each ...

SHORT COMMUNICATION: Distribution of ...

The spatial distribution of cesium-137 was examined at two uncultivated sites in the Black soifzone of Saskatchewan. Although considerable variability occurred at both sites, the variability was not systematically related to ... redistribution of r37Cs observed by Kachanoski (i986) is not evi.4ent in these prairie landscapes.

Cesium-137 - Its applications for understanding soil ...

In the 1960s research began on the application of fallout radionuclides to determine sediment deposition and soil redistribution rates and patterns in agricultural and natural ecosystems. This research was based on the use of fallout Cesium-137 (Cs-137) from nuclear weapon tests deposited worldwide during the 1950's and 1960's.

Using fallout Cesium-137 to understand soil redistribution ...

Using fallout Cesium-137 to understand soil redistribution on agricultural landscapes Jerry C. Ritchie1 – Gregory W. McCarty2 1,2USDA ARS Hydrology and Remote Sensing Laboratory, Beltsville, MD 20705, USA 1Tel.: 1-301-504-8717; Fax: 1-301-504-8931; E-mail: [email protected] 1. Abstract While it is recognized that soil erosion is highly variable in space and time, studies of the ...

Use of caesium-137 and lead-210 as tracers in soil erosion ...

using caesium-137 as a tracer in soil erosion investigations and caesium-137 measurements are now accepted as an effective and valuable means of producing retrospective information on medium-term rates and patterns of soil redistribution. There are, however, two important limitations to the general application of the approach. These involve the

Soil redistribution rate and its relationship with soil ...

The spatial pattern of soil redistribution rate was investigated using cesium-137 (137 Cs) within a cultivated complex hillslope in western Iran.The relationship between soil redistribution rate and soil organic carbon and total nitrogen pattern were studied using co-regionalization analysis.

Journal of Environmental Quality Abstract - Improved ...

Abstract. Fallout cesium-137 (137 Cs) measurements have been used in investigations of water-induced soil erosion in a wide range of environments and in many different areas of the world over the past 20 yr.However, the existing calibration procedures commonly used for deriving quantitative estimates of soil redistribution rates from 137 Cs measurements involve several limitations and ...

Application of Radioactive Fallout Cesium-137 for ...

Application of Radioactive Fallout Cesium-137 for Measuring Soil Erosion and Sediment ... are major causes of redistribution of 137CS in soils and movement of 137CS from soils to water. Cesium-137 in water is from direct deposition on water surfaces and input of 137CS adsorbed on eroded ...

Using Cesium-137 to estimate soil particle redistribution ...

The spatial pattern of soil redistribution rate was investigated using cesium-137 ((137)Cs) within a cultivated complex hillslope in western Iran. The relationship between soil redistribution rate and soil organic carbon and total nitrogen pattern were studied using co-regionalization analysis. Ninety-one soil cores were sampled for (137)Cs, total nitrogen, and soil organic carbon measurements.

USGS -- Isotope Tracers -- Resources

Periodic Table--Cesium. Cesium has only one naturally occurring stable isotope, 133 Cs. The radiogenic isotope 137 Cs has been used in hydrologic studies, analogous to the use of 3 H. 137 Cs is produced from detonation of nuclear weapons and emissions from nuclear power plants. Beginning in 1954 with the commencement of nuclear testing, 137 Cs was released into the atmosphere where it is ...

Caesium-137 - Wikipedia

Caesium-137 (137 55 Cs), or radiocaesium, is a radioactive isotope of caesium which is formed as one of the more common fission products by the nuclear fission of uranium-235 and other fissionable isotopes in nuclear reactors and nuclear weapons. Trace quantities also originate from natural fission of …