Research on the correlation between surface damage and radon release of uranium tailings dam after seismic based on binocular vision DOI Creative Commons
Kai Liu,

Xingwang Dai,

Yong Liu

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: May 21, 2024

Abstract In order to obtain the surface crack development, displacement information of uranium tailing dam conveniently, and evaluate interrelationship between damage radon migration changes, this paper constructed an indoor model based built a binocular camera using smartphones image data under multi-stage simulated seismic loading. Image processing techniques were used quantify cracks displacements, meters recorded release data. The results showed that was positively correlated with loading strength. At 0.9 g, rate reached 3.27%, free caused by led multiple traction failures; maximum artificial markers on slope increased steadily from 7.748 mm after 0.3 g 19.45 0.7 then surged 46.52 g; stronger earthquake intensity, higher concentration released model. trend consistent displacement, but change more synchronized displacement. technique is expected provide economical intuitive method for engineering environmental safety evaluation.

Language: Английский

Submarine Groundwater Discharge: A Source of Nutrients, Metals, and Pollutants to the Coastal Ocean DOI
Karen L. Knee, Natasha Dimova, Alanna L Lecher

et al.

Elsevier eBooks, Journal Year: 2023, Volume and Issue: unknown, P. 123 - 163

Published: Nov. 21, 2023

Language: Английский

Citations

28
Short-lived natural radionuclides as tracers in hydrogeological studies – A review DOI Creative Commons
Michael Schubert, Mang Lin, Jordan F. Clark

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 920, P. 170800 - 170800

Published: Feb. 9, 2024

Fundamental approaches to the study of groundwater rely on investigating spatial and temporal distribution stable radioactive isotopes other anthropogenic compounds in natural waterbodies. The most often used tracers for estimating flow paths residence times, groundwater/surface water interaction as well tracing chemical (contamination) sources include (δ 18O δ 2H), radiocarbon (14C; t1/2 = 5730 a), tritium (3H; 12.43 a) unreactive fluorine-containing gases (e.g., chlorofluorocarbons CCl3F or CFC-11; CCl2F3 CFC-12; C2Cl3F3 CFC-113; SF6). While gas are usually referred transient appropriate modern systems, isotopic investigated paleo regional systems. Stable can also be investigate interactions. Another, thus far been less frequently group tracers, cosmo- geo- genic short-lived radioisotopes. These uniquely suited studying a wide range problems that have short time scales including high aquifer vulnerability quantitative qualitative impacts discharge surface waters. Here, we discuss compare applications radio‑sulphur (35S; half-life 87 d), radio‑beryllium (7Be; 53 radio‑phosphorus (32/33P; combined 33 radon (222Rn; 3.8 d) radium (224/223Ra; 5.2 d). paper discusses principles individual tracer methods, focusing isotopes' input functions values, sampling techniques, methods analyses. Case studies applied use readers who wish learn more about application so underused radioisotopes aquatic tracers.

Language: Английский

Citations

9
Groundwater releases CO 2 to diverse global coastal ecosystems DOI Creative Commons
Aprajita Singh Tomer, Tristan McKenzie, Claudia Majtényi‐Hill

et al.

Science Advances, Journal Year: 2025, Volume and Issue: 11(2)

Published: Jan. 10, 2025

Coastal ecosystems play a major role in marine carbon budgets, but substantial uncertainties remain the sources and fluxes of coastal dioxide (CO 2 ). Here, we assess when, where, how submarine groundwater discharge (SGD) releases CO to shallow ecosystems. Time-series observations dissolved radon ( 222 Rn, natural tracer) across 40 systems from 14 countries revealed large SGD-derived fluxes. The mean partial pressure was 35 times higher than surface seawater. flux 148 ± 226 millimoles per square meter day (mmol m −2 −1 ), resulting water-air 80 133 mmol . Tidal rather diel cycles drove enrichment most Tidally driven SGD primary source mangroves, salt marshes, tidal flats, estuaries, canals. Overall, expand current knowledge by demonstrating as an important that requires inclusion budgets.

Language: Английский

Citations

1
Control of Groundwater‐Lake Interaction Zone Structure on Spatial Variability of Lacustrine Groundwater Discharge in Oxbow Lake DOI Creative Commons
Xiaoliang Sun, Yao Du, Jiawen Xu

et al.

Water Resources Research, Journal Year: 2025, Volume and Issue: 61(1)

Published: Jan. 1, 2025

Abstract Lacustrine groundwater discharge (LGD) is an important water and nutrient source for lakes. Despite its importance, high‐resolution quantifying the spatial variability of LGD remains challenging. Particularly, little studies have explored impact interaction zone structure between lakes aquifers on this variability. Present study presents a quantitative estimation patterns in oxbow lake by combining thermal remote sensing with 222 Rn mass balance model. The vertical distribution characteristics various parameters including temperature, concentration, electrical conductivity, δ 18 O were examined to elucidate influence pattern surface temperature (LST). Regression equations formulated correlate LST concentration across different depth zones, enabling inverse calculation entire lake. Utilizing model all grid points, rate was determined vary from 0 330.96 mm/d, average 55.02 ± 19.61 mm/d. In shallow accumulation lacustrine sediments has resulted isolation confined aquifers, causing primarily occur as springs nearshore areas. Conversely, direct connection deepwater water‐rich aquifer higher interior. not only offers novel approach but also provides valuable insights conducted globally.

Language: Английский

Citations

1
Potential radon risk in permafrost regions of the Northern Hemisphere under climate change: A review DOI
Shengrong Zhang,

Doudou Jin,

Huijun Jin

et al.

Earth-Science Reviews, Journal Year: 2024, Volume and Issue: 250, P. 104684 - 104684

Published: Jan. 19, 2024

Language: Английский

Citations

7
Characteristics of methane and carbon dioxide in ice caves at a high-mountain glacier of China DOI

Zhiheng Du,

Hao Cui, Lei Wang

et al.

The Science of The Total Environment, Journal Year: 2024, Volume and Issue: 946, P. 174074 - 174074

Published: June 21, 2024

Language: Английский

Citations

5
Methane Emissions in Seagrass Meadows as a Small Offset to Carbon Sequestration DOI Creative Commons
Yvonne Y. Y. Yau, Gloria Reithmaier, Claudia Majtényi‐Hill

et al.

Journal of Geophysical Research Biogeosciences, Journal Year: 2023, Volume and Issue: 128(6)

Published: May 13, 2023

Abstract Seagrass meadows are effective carbon sinks due to high primary production and sequestration in sediments. However, methane (CH 4 ) emissions can partially counteract their sink capacity. Here, we measured diffusive sediment‐water sea‐air CO 2 CH fluxes a coastal embayment dominated by Posidonia oceanica the Mediterranean Sea. High‐resolution timeseries observations revealed large spatial temporal variability concentrations (2–36 nM). Lower were observed an area with dense seagrass compared patchy seagrass. A 6%−40% decrease of concentration surface water around noon indicates that photosynthesis likely limits fluxes. Sediments major source as implied from radon (a natural porewater tracer) evidence for methanogenesis deeper (0.1 ± 0.1–0.4 0.1 μmol m −2 d −1 higher than average (0.12 0.10 ), suggesting dilution oxidation column could reduce net into atmosphere. Overall, relatively low represent subtidal habitat not influenced allochthonous sources. The local P. offset less 1% burial sediments (142 69 g 2eq yr ). Combining our results earlier other worldwide reveals global only small fraction (<2%) meadows.

Language: Английский

Citations

12
Synergy of lacustrine groundwater discharge and algal biomass on CH4 and CO2 pathways and emissions in a large shallow eutrophic lake DOI
Shi Xiao-yan, Xin Luo,

Jiu Jimmy Jiao

et al.

Journal of Cleaner Production, Journal Year: 2024, Volume and Issue: 466, P. 142798 - 142798

Published: June 7, 2024

Language: Английский

Citations

4
Is the impact of groundwater on lake greenhouse gas dynamics underestimated? A comparative analysis of subsurface and ecological factors DOI

Jieyu Yu,

Qianqian Wang, Benjamin Gilfedder

et al.

Journal of Hydrology, Journal Year: 2024, Volume and Issue: 640, P. 131666 - 131666

Published: July 22, 2024

Language: Английский

Citations

4
Lacustrine groundwater discharge as an important hidden source of nutrients to a large eutrophic lake: Implications for eutrophication management DOI
Junyao Zheng, Kouping Chen, Jianfeng Wu

et al.

The Science of The Total Environment, Journal Year: 2025, Volume and Issue: 960, P. 178313 - 178313

Published: Jan. 1, 2025

Language: Английский

Citations

0