Current distribution of 137cs in sod-podzolic soils of different types of forest conditions
Journal Title: Восточно-Европейский журнал передовых технологий - Year 2018, Vol 5, Issue 10
Abstract
We have examined the current distribution of <sup>137</sup>Cs in the turf-podzolic forest soils for different types of forest conditions. The analysis of the redistribution of <sup>137</sup>Cs in soil in 30 years after the Chernobyl nuclear plant accident is necessary in order to assess the intake of the radionuclide by the various components of forest ecosystems and to substantiate the rehabilitation of forest areas. We have discovered a significant displacement of significant amount of<sup> 137</sup>Cs to mineral part of the soil in all types of forest conditions under consideration. The maximum magnitudes of the <sup>137</sup>Cs specific activity in the forest litter were established, as well as a reduction in this indicator from its upper part (current litter) to the bottom (decomposed). In fresh forests, it reduced by 3.1 times; in fresh subors, by 1.2 times; in wet subors, by 1.5 times. Based on the magnitude of specific activity of<sup> 137</sup>Cs, the layers of the forest litter for the examined types of forest conditions can be placed in a descending order: decomposed layer > semi-decomposed layer > current litter. The humus-eluvial horizon of the soil with a capacity of 12 cm has concentrated: in fresh forests, 54.0 %; in fresh subors, 40.0 %; in wet subors, 52.8 %, of the total radionuclide activity in the soil, and, together with the content of <sup>137</sup>Cs in the forest litter, 75.0 %; 65.8 %, and 71.5 % (according to the type of forest conditions). We have noted a gradual decrease in the<sup>137</sup>Cs specific activity along the profile to the parent rock. Thus, 26.4 %, 35.7 %, and 28.5 %, respectively, of the total stock of the radionuclide in the soil, have migrated to the lower layers of the soil profile (12–88 cm). The obtained materials have been confirmed by a one-factor dispersion analysis at a 95-% confidence level. Based on the results obtained, one can predict the future levels of radioactive contamination in forestry products
Authors and Affiliations
Viktoriia Melnyk, Tatiana Kurbet
Development of measures to improve milk quality and safety during production
<p>The number of somatic cells in cow milk affects its quality indicators, grade and safety. The level of somatic cells in milk depends on the state of the udder in animals. That is why it is important to diagnose sub-cl...
Detecting the influence of heat sources on material properties when producing aviation parts by a direct energy deposition method
<p>Quality of the material obtained by the method of direct energy deposition using three heat sources (plasma arc, electric welding arc and welding arc with cold metal transfer) was studied. AlMg5 alloy wire was used as...
Forecasting the estimated time of arrival for a cargo dispatch delivered by a freight train along a railway section
<p>This paper reports a method for predicting the expected time of arrival (ETA) of a cargo dispatch taking into consideration determining the duration at which a freight train travels along a railroad section where trai...
Development of portable dc voltage calibrators with additive offsets adjusting
<p>Improvement of portable equipment for controlling the DC voltage measuring channels of cyber-physical systems at the operating sites is proposed. Additive offsets and drifts make a dominant contribution to the error o...
Method for the detection of smallsized air objects by observational radars
<p>We proposed the introduction of an additional mode of dispersed reception and the combination of one-position and multiple reception of signals to the existing one-position observation radar. We improved the algorithm...