Measurement uncertainty arising from sampling of environmental samples

Glavič-Cindro, Denis; Hazou, Eyakifama; Korun, M.; Krištof, Romana; Osterman, Petra; Petrovič, T.; Vodenik, B.; Zorko, Benjamin

doi:10.1016/j.apradiso.2019.108978

Cited by 14 publications

(5 citation statements)

References 9 publications

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“…Thorium and potassium activity concentrations display negative values of skewness, meaning that they are skewed left and the left tail is longer. These observations could be associated to sampling and samples preparation uncertainties (Glavič-Cindro et al, 2020). Despite the non-zero values of skewness, it can be assumed that data follows normal univariate distribution because they do not exceed the confidence normal distribution interval which varied from -2 to +2 (Westfall, 2014;.…”

Section: Discussionmentioning

confidence: 99%

Health Risk Assessment and Statistical Analysis of Natural Radioactivity in the Uranium Exploration Area of Zabili, Chad

Penabeï

Bongue

Hazou

et al. 2022

Preprint

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The activity concentrations of natural radionuclides 226Ra, 232Th and 40K in nineteen soil samples from Zabili uranium exploration area were measured using a low-background digital gamma-ray spectrometer equipped with broad energy germanium detector. The activity concentrations of 238U, 232Th, and 40K range from 16.5 to 1110.9 Bq.kg− 1, 19.45 to 76.97 Bq.kg− 1, and 3.28 to 839.5Bq.kg− 1, with their mean values of 478.0, 58.9, and 562.5, respectively. In addition, radiological hazard parameters from the activity concentrations obtained were assessed by estimating radium equivalent activity, external and internal hazard index, indoor and outdoor absorbed gamma dose rate and the corresponding annual effective dose, effective dose rate to different body organs and tissues, and excess lifetime cancer risk. Derived radiological hazard indices have been revised in accordance with relevant national and international legislation and guidelines. The radiological hazard parameter values were found to be above the relevant limit values for soils. In order to investigate the distribution of radionuclides and associated health hazard parameters in the study area, a statistical study was performed.

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Section: Discussionmentioning

confidence: 99%

Health Risk Assessment and Statistical Analysis of Natural Radioactivity in the Uranium Exploration Area of Zabili, Chad

Penabeï

Bongue

Hazou

et al. 2022

Preprint

Self Cite

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Section: Discussionmentioning

confidence: 99%

Health risk assessment and statistical analysis of natural radioactivity in the uranium exploration area of Zabili, Chad

Penabeï

Bongue

Hazou

et al. 2022

International Journal of Environmental Analytical Chemistry

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“…The uncertainties of sample collection in this study mainly include spatial variability (sampling at different locations in the subwatershed) and temporal variability (sampling at different times) (Glavič‐Cindro et al, 2020). In fact, since it takes some time for precipitation to replenish river water, the time of flow generation and convergence of different events is different.…”

Section: Discussionmentioning

confidence: 99%

A preliminary estimate of how stream water age is influenced by changing runoff sources in the Nagqu river water shed, Qinghai‐Tibet Plateau

Yang

Weng

Yan

et al. 2021

Hydrological Processes

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Stream water age is an essential indicator of stream water renewal and pollutant transport rates. Recently, the concept of young water fractions, calculated using stable isotopic data, was proposed as a measure of stream water age. However, the current calculation methods do not classify stream water fractions with annual cycles (365 days), which are helpful to understand the sources of runoff and the water renewal rate in the watershed. In this study, we took the Nagqu River Watershed (NRW, with an area of 16 900 km 2 ) as an example and proposed the concept of middle-aged water to solve this problem. We used two time thresholds τ yw and τ ow to divide the stream water age into young water, middle-aged water and old water in runoff and calculated middle-aged water using a distributed hydrological model. The results revealed that in the NRW, an average of 23% of the runoff was less than 51.6 days old, whereas an average of 55% of the runoff had ages ranging from 51.6 to 365 days. The spatial change in stream water age is significantly influenced by the sources of streamflow, evaporation, air temperature and soil moisture. The annual average change in old water storage values were À0.33 km 3 , suggesting that the mean of old water in the NRW decreased from 2016 to 2019. The results of this study are helpful for the study of sources of streamflow and stream water fractions, as well as providing a more effective understanding of the internal hydrological process in a depopulated alpine zone under the impacts of climate change.

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Measurement uncertainty arising from sampling of environmental samples

Cited by 14 publications

References 9 publications

Health Risk Assessment and Statistical Analysis of Natural Radioactivity in the Uranium Exploration Area of Zabili, Chad

Health Risk Assessment and Statistical Analysis of Natural Radioactivity in the Uranium Exploration Area of Zabili, Chad

Health risk assessment and statistical analysis of natural radioactivity in the uranium exploration area of Zabili, Chad

A preliminary estimate of how stream water age is influenced by changing runoff sources in the Nagqu river water shed, Qinghai‐Tibet Plateau

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