Spatial distribution of<sup>137</sup>Cs in surface soil under different land uses in Chao Phraya watershed: Potential used as sediment source tracing

Srisuksawad, Kanitha; Porntepkasemsan, Boonsom; Noipow, N; Omanee, A; Wiriyakitnateekul, Wanpen; Chouybudha, R; Srimawong, Prapaipit

doi:10.1088/1742-6596/611/1/012026

Cited by 3 publications

(2 citation statements)

References 20 publications

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“…The applicability of the approach in Taiwan was also demonstrated in a study conducted in a catchment covered with tea plantations (Zehetner et al, 2008). In contrast, in a catchment of Central Thailand, 137 Cs activities were systematically < 1 Bq kg -1 for all sources (i.e., uncultivated, cultivated and pasture soils) (Srisuksawad et al, 2015). These results differed with those obtained in a study conducted in Eastern Indonesia, where surface (mean: 1.9 Bq kg -1 ) and subsurface (< 0.3 Bq kg -1 ) source contributions could be discriminated based on their 137 Cs fallout activities (Hobgen et al, 2014).…”

Section: Spatial Applicability Of 137 Cs Based-tracing Across the Globementioning

confidence: 92%

A global review of sediment source fingerprinting research incorporating fallout radiocesium (137Cs)

et al. 2020

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Information on the main sources supplying deleterious sediment loads to river systems is needed to improve our understanding of soil erosion processes. In particular, it is important to quantify the respective contributions of surface and subsurface sources to material degrading waterbodies. Radiocesium (137 Cs), emitted during thermonuclear bomb testing (~1950-1980) and nuclear accidents provides significant discrimination between surface material exposed to atmospheric fallout and subsurface material sheltered from it. A systematic worldwide review of research articles (n=123) that used 137 Cs to trace sediment sources showed that the United Kingdom (n=24), Australia (n=23) and the United States (n=20) had the highest number of publications utilizing 137 Cs in a sediment tracing framework. In contrast, few studies were published for catchments in Africa (n=9) or South America (n=2). In the northern hemisphere, positive relationships were evident between 137 Cs activities in surface and subsurface sources and the proportion of thermonuclear bomb fallout. However, given the low proportions of fallout received in regions between 0-20°N and 0-20°S, the potential application of 137 Cs tracing techniques may be limited in this area of the world as well as in agricultural regions with severe soil erosion (i.e. Chinese Loess Plateau and South Africa). In total, 94% of the studies researching surface and subsurface sources that analyzed 137 Cs as a potential tracing property included this parameter in end-member mixing models. The main challenges for the future of this technique are mainly related to the access to ultra-low background gamma spectrometry facilities and the development of surrogate tracers. Future research should ensure that basic catchment information and details on the sampling design are properly documented to ensure studies are reproducible. Moreover, researchers should provide raw measurement data to help improve our global understanding of 137 Cs dynamics in soil erosion research.

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Section: Spatial Applicability Of 137 Cs Based-tracing Across the Globementioning

confidence: 92%

A global review of sediment source fingerprinting research incorporating fallout radiocesium (137Cs)

et al. 2020

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“…Additionally, sediment samples (n = 8) were collected on the 28 August 2017, at the place where the stream enters the Hartbeespoort dam, by surficial scarping of the deposited sediment layers using plastic trowels during the dry season, when the river flow has receded to represent the sink areas. All subsurface sources (n = 34) were collected from recently developed gully walls ( Figure 1 A), while the riverbank samples were collected at a depth below 20 cm, as prescribed by [ 26 , 59 ]. Both types of samples were collected on the 5 April 2018.…”

Section: Methodsmentioning

confidence: 99%

Anthropogenic Land Use and Land Cover Change as Potential Drivers of Sediment Sources in the Upper Crocodile River, North West Province, South Africa

Nde

Bett

Mathuthu

et al. 2022

IJERPH

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In this study, we investigated the accelerating pace of anthropogenic land use and land cover change (LULCC) disturbance, which has generated enormous impacts on the Crocodile River. Spot images from 1996, 2009 and 2022 were used to generate the land use maps and quantify the changes. A supervised classification with the maximum likelihood classifier was used to classify the images. Sediment sources were classified into two sources, revealed by erosional characteristics in the catchment. A gamma spectrometry detector, high-purity germanium (HPGe) “Well” detector by Canberra and inductively coupled plasma mass spectrometry (ICP–MS) were used for the analysis of the samples. The results revealed that from 1996–2022, built-up areas, bare land and water bodies increased by 3.48%, 2.47% and 1.90%, respectively. All the LULCC classes increased annually from 1996–2022, except for grassland, which shrunk. The results of the radionuclides analysis showed that 210Pbex was found to be a more effective tracer than 137Cs. The mass balance model revealed that subsurface sources contributed 60%, while surface sources contributed 40%, of the sediment load in the river. This research provides valuable information necessary for integrated catchment management policies for future LULCC and soil erosion to be adopted.

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Distribution and characteristics of 137Cs in surface soil in the middle of Laos

Nguyen¹,

Bui²,

Duong³

et al. 2023

J Radioanal Nucl Chem

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Spatial distribution of¹³⁷Cs in surface soil under different land uses in Chao Phraya watershed: Potential used as sediment source tracing

Cited by 3 publications

References 20 publications

A global review of sediment source fingerprinting research incorporating fallout radiocesium (137Cs)

A global review of sediment source fingerprinting research incorporating fallout radiocesium (137Cs)

Anthropogenic Land Use and Land Cover Change as Potential Drivers of Sediment Sources in the Upper Crocodile River, North West Province, South Africa

Distribution and characteristics of 137Cs in surface soil in the middle of Laos

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Spatial distribution of137Cs in surface soil under different land uses in Chao Phraya watershed: Potential used as sediment source tracing

Cited by 3 publications

References 20 publications

A global review of sediment source fingerprinting research incorporating fallout radiocesium (137Cs)

A global review of sediment source fingerprinting research incorporating fallout radiocesium (137Cs)

Anthropogenic Land Use and Land Cover Change as Potential Drivers of Sediment Sources in the Upper Crocodile River, North West Province, South Africa

Distribution and characteristics of 137Cs in surface soil in the middle of Laos

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Spatial distribution of¹³⁷Cs in surface soil under different land uses in Chao Phraya watershed: Potential used as sediment source tracing