A low-cost delta underwater gamma system (DUGS) for in-situ measurement of natural radionuclides in aquatic sediments

Kilel, K. K.; Bezuidenhout, J; Gatari, M. J.; Roux, R. R. le; Kaniu, M. I.

doi:10.1007/s10967-022-08701-7

Cited by 3 publications

(1 citation statement)

References 29 publications

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“…In situ measurements were performed in the Berg River estuary using an in‐house developed system called the Delta Underwater Gamma System (DUGS) (Kilel et al, 2021). The system encompasses a NaI(Tl) detector and signal analysis electronics enclosed in a waterproof stainless‐steel enclosure.…”

Section: Methodsmentioning

confidence: 99%

Radiometric mapping of the Berg River estuary

Henrico

Roux

et al. 2022

Transactions in GIS

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Geographic Information Systems (GIS) consists of various tools to perform spatial analyses in a wide variety of disciplines, including radiometric analysis to characterize the distribution of natural radionuclide concentrations. Recently, open-source GIS has become popular among geospatial users because it can be freely used, and powerful tools are constantly developed to enhance software capabilities. Gamma-ray spectroscopy was used to measure the concentrations of these natural radionuclides by dragging a Delta Underwater Gamma System (DUGS) among the sediment in the Berg River estuary located in Velddrif, South Africa. In this study, QGIS was used to visually illustrate and interpret the distribution of natural radionuclides, that is, potassium (K 40 ), thorium (Th 232 ), and uranium (U 238 ). These concentrations can be used to investigate various geographical and geological phenomena, which include sediment processes. The data were then interpreted to derive sediment characteristics. Various features of tidal estuaries were demonstrated by the results.

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Section: Methodsmentioning

confidence: 99%

Radiometric mapping of the Berg River estuary

Henrico

Roux

et al. 2022

Transactions in GIS

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A novel method for the efficiency calibration of in situ gamma spectrometry systems

Satti,

Siddique,

Rehman

et al. 2024

Radiation Physics and Chemistry

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The Characterization and Optimization of an Underwater Gamma-Ray Detection System (DUGS)

Bezuidenhout

Roux

Kilel

2023

JMSE

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Sedimentation can cause numerous problems in rivers, estuaries, harbors, and coastal areas. It is therefore important to trace and model the movement of sediments. The natural physical, chemical, and biological components of the aquatic sediment generally relate to these features in its terrestrial catchment area. It consequently contains the naturally occurring radionuclides of thorium, uranium, and potassium, which can be used as tracers. To achieve this aim, a delta underwater gamma system (DUGS) was developed to map the radionuclides in aquatic sediments. Though the system has been tested for radiometric accuracy, the low concentrations of natural radionuclides in aquatic sediments and the attenuation by the water and detector enclosure necessitated an evaluation to determine the detection efficiency of the detector along with optimal operational parameters. These included spectra accumulation time and underwater speed. The DUGS was consequently used to determine and optimize these parameters for mobile measurement of aquatic sediments. The acquired gamma spectra were also analyzed using full spectrum and energy window analysis to determine the optimal method for extracting the activity concentrations of the nuclides in the sediments.

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A low-cost delta underwater gamma system (DUGS) for in-situ measurement of natural radionuclides in aquatic sediments

Cited by 3 publications

References 29 publications

Radiometric mapping of the Berg River estuary

Radiometric mapping of the Berg River estuary

A novel method for the efficiency calibration of in situ gamma spectrometry systems

The Characterization and Optimization of an Underwater Gamma-Ray Detection System (DUGS)

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