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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 2:02 |
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Conference: Bucharest University Faculty of Physics 2010 Meeting
Section: Applied Nuclear Physics
Title:
Assessment of sedimentation rate through the use of anthropogenic 137Cs radionuclide
Authors:
A. M. Blebea-Apostu (1), I. Radulescu (1), R. Margineanu (1), I. Ionita (2), I.V. Popescu (1)(3)
Affiliation:
(1) Horia Hulubei National Institute for Physics and Nuclear Engineering
(2) Alexandru Ioan Cuza University of Iasi, Faculty of Geography and Geology
(3) Valahia University of Targoviste, Faculty of Sciences and Arts
E-mail
anapostu@ifin.nipne.ro
Keywords:
137Cs, sediment deposition, gamma spectrometry
Abstract:
A typical example of gamma spectrometry application using 137Cs technique is related to the assessment of sedimentation rates in both the river floodplains and the reservoirs. The presence of 137Cs in soil and sediments is mainly associated to the Chernobyl accident.This paper deals with the four sites within the Moldavian Plateau, namely: three reservoirs in the Moldavian Plain (Campeni-Miletin, Lungani–Albesti and Ciurbesti-Nicolina) and the alluvial plain of the Studinet River upstream of Corodesti within the Tutova Rolling Hills. Use of the 137Cs technique has demonstrated a slow rate of sedimentation of 0.9 – 2.6 cm yr-1 at those reservoirs in the Moldavian Plain since 1986 and a high rate of aggradation of 4.2 cm yr-1 in the northern part of Tutova Rolling Hills. Excepting Miletin basin most of the catchments are small in area, usually under 5,000 ha.The significant difference of the sedimentation rates in those two areas of the Moldavian Plateau is resulting from the particular features of the landscape morphology and the geologic substratum. Thus, almost platte landforms developed on clayey layers are typically in the Moldavian Plain, while high hills on sandy layers are depicting the northern half of the Tutova Rolling Hills.
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