Article
Engineering, Environmental
Shi-chun Cai, Xiao-hua Yang, Fei Ye
Summary: A calculation method based on the Winkler foundation model is proposed for analyzing the stress and deformation in excavation support structures in seasonally frozen soil regions. The method considers various factors and has been validated to exhibit good applicability.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Shivam Pandey, Ajay Singh, Anuj Kumar, Inderjeet Tyagi, Rama Rao Karri, Rama Gaur, Hamedreza Javadian, Monu Verma
Summary: This research compares the effectiveness of hydrothermally produced ZnO and SnO2 nanocatalysts in degrading p-nitrophenol, a noxious chemical in water. The study finds that ZnO catalyst has better degradation efficiency compared to SnO2 catalyst. Detailed investigation reveals the optimal conditions for degrading p-nitrophenol using ZnO photocatalysts.
PHYSICS AND CHEMISTRY OF THE EARTH
(2024)
Article
Computer Science, Interdisciplinary Applications
Deze Yang, Xihua Chu
Summary: Creep and stress relaxation behaviors in granular materials are influenced by the time-dependent changes in their microstructure, with particle shape playing a significant role. However, the effects of particle shape on these behaviors are still not well understood. In this study, 3D DEM models incorporating the rate process theory and superellipsoids are used to simulate creep and stress relaxation in granular samples with different aspect ratios and blockiness. The results show that both aspect ratio and blockiness have a significant influence on creep and stress relaxation, with aspect ratio affecting creep through contact force ratio and blockiness affecting stress relaxation through variation in normal contact force anisotropy. These findings provide insights into the effects of particle shape on creep and stress relaxation in granular assemblies.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Geosciences, Multidisciplinary
Zhenhua Tian, Shangwen Zhou, Songtao Wu, Sai Xu, Junping Zhou, Jianchao Cai
Summary: This paper presents a modified method for calculating the lost gas content of shale by analyzing the coring and on-site desorption processes. The method accurately depicts the loss characteristics of free and adsorbed gas and identifies parameters that influence the calculation of in-situ shale gas content. The results demonstrate that the method shows satisfactory applicability in gas loss curve prediction and in-situ gas content estimation.
Article
Geosciences, Multidisciplinary
Simone M. A. Lira, Ralf Schwamborn, Mauro de Melo Junior, Humberto L. Varona, Syumara Queiroz, Doris Veleda, Alef J. Silva, Sigrid Neumann-Leitao, Moacyr Araujo, Catarina R. Marcolin
Summary: In this study, CTD and ADCP data, as well as zooplankton samples from Fernando de Noronha Archipelago, were used to analyze the relationship between flow, island topography, chlorophyll-a fluorescence, and zooplankton abundance. The study found the presence of island and larval island effects downstream, and an upstream island effect upstream.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Xindong Pan, Zhenjiang Ye, Jia Wo, Qingwang Xing, Jian Yang, Yong Chen, Yongjun Tian
Summary: This study focuses on the otolith biogeochemical signatures of Japanese Spanish mackerel in the Yellow Sea. The results show that these signatures can be used as natural tags to understand the interannual variability in migration of marine fish species.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Engineering, Environmental
Mikael Schlumpf, Jordy Hendrikx, John Stormont, Ryan Webb
Summary: The formation of wet-snow slab avalanches is related to the liquid water content and strength of the snow layers. However, current studies disagree on this relationship and there is limited understanding of snow layers with a saturation level of θ=7% and above.
COLD REGIONS SCIENCE AND TECHNOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Xuemei Mei, Chuangui Wang, Guojun Zhang, Xiaoming Zhang, Peng Li, Zhengyan Ren, Wei Leng
Summary: Large-scale afforestation on the Loess Plateau of China may lead to increased soil moisture deficit and SOC loss, especially in downslope areas. Natural grassland, on the other hand, exhibits low water depletion and high SOC sequestration. Therefore, a vegetation restoration strategy involving afforestation of downslope patches within a contiguous grassland matrix may be an effective approach.
Article
Geosciences, Multidisciplinary
Xiaolong Qiao, Muntasir Murshed, Mohammad Mahtab Alam, Narasingha Das, Kurshid Khudoykulov, Salman Tariq
Summary: This study examines how macroeconomic factors influence India's carbon emission intensity levels and confirms the impact of factors such as foreign remittance receipts, energy consumption, urbanization, and technological progress. The findings provide policy recommendations for India's carbon emission reduction targets.
Article
Geosciences, Multidisciplinary
N. Colombo, R. Balestrini, D. Godone, D. Vione, D. Said-Pullicino, G. Viviano, M. Martin, C. A. Delconte, S. Fratianni, A. G. Capodaglio, E. Pintaldi, M. Freppaz, F. Salerno
Summary: This study utilizes a UV-Vis submersible spectrophotometric probe to measure the concentration of nitrate nitrogen in a high-elevation pond. Through continuous measurements and analysis of stable isotopes, meteorological data, and water temperature, the study examines the dynamics of nitrate in response to changes in meteoclimatic conditions. The results highlight the significant influence of summer precipitation, snow melt, and temperature on nitrate concentration, with short-duration meteorological events causing rapid variations. Additionally, the study reveals the important role of in-pond biological processes and the impact of heavy rainfall events on nitrate trends in high-elevation ponds.
Article
Geosciences, Multidisciplinary
Nirdesh Sharma, Manabendra Saharia, G. V. Ramana
Summary: This study develops a probabilistic framework combining imbalance handling and ensemble machine learning for landslide susceptibility mapping. It overcomes limitations of existing landslide susceptibility maps and successfully develops India's first national-scale machine learning-based landslide susceptibility map. The framework demonstrates high accuracy, robustness, and generalizability, and identifies new landslide susceptible zones in India.
Article
Geosciences, Multidisciplinary
Maurizio Palmisano, Giuseppina Balassone, Sabino Maggi, Alexander Armesto Arenas, Luis E. Correa Valero, Feliciano Ippolito, Nicola Mondillo, David F. Morales Giraldo, Angela Mormone, Annamaria Pellino, Francesco Putzolu, Diana Di Luccio
Summary: Mud volcanoes in northwestern Colombia are used by local people as affordable recreational and wellness centers, particularly for pelotherapy. This research aims to determine the potential therapeutic value of the solid and liquid fractions of the muds sampled from these volcanoes through geochemical and mineralogical analysis. The study found that the muds are suitable for use by the local population due to their extremely low levels of contaminants harmful to human health.
Article
Geosciences, Multidisciplinary
Denise Fabiana de Moraes Costa Schwamborn, Catarina R. Marcolin, Nathalia Lins-Silva, Alexandre Oliveira de Almeida, Ralf Schwamborn
Summary: The present study aimed to quantify the contributions of decapod crustaceans to the zooplankton in coastal tropical ecosystems and found that decapods were the second most important organisms, after copepods, in abundance, biomass, and biovolume. Crabs and shrimps were the most relevant decapod taxa in these ecosystems.
JOURNAL OF MARINE SYSTEMS
(2024)
Article
Geosciences, Multidisciplinary
Yanxian Zhu, Zhiliang He, Xiaowen Guo, Long Li, Sheng He, Jian Gao, Shuangjian Li, Huili Li
Summary: This study investigates the fluid evolution history of the hydrothermal dolomite reservoir in the Middle Permian Maokou Formation in the Sichuan Basin. The results reveal the diagenetic sequences, mineral origins, salinity history, and pressure evolution using various analytical techniques. The findings provide important insights into the gas charge, escape, and preservation conditions of the reservoir.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Geosciences, Multidisciplinary
Donghui Zhao, Congcong Shen, Zhi-Ming Zhang, Jichen Wang, Li-Mei Zhang, Baodong Chen, Guo-Xin Sun, Yuan Ge
Summary: By studying soil samples from different slope directions along an elevational gradient in a mountain ecosystem, we found that soil bacterial diversity and microbial functions exhibit distinct elevational patterns, which are consistent across slope directions. The bacterial diversity shows a hump-shaped pattern, while microbial functions exhibit a linear increasing trend. Additionally, the beta diversity pattern of soil bacteria is significantly influenced by elevational distance decay relationships. Soil bacterial diversity patterns are determined by transitions in community assembly processes, whereas microbial functions are mainly influenced by bacterial community composition.
Article
Geosciences, Multidisciplinary
Kang Meng, Tongwei Zhang, Deyong Shao, Xiuyan Liu, Hui Song, Heng Peng
Summary: In this study, an integrated method of measuring optical reflectance and Raman spectroscopy is proposed to accurately determine the thermal maturity of Lower Cambrian shales in South China. The results show that this method is reliable and effective, and it has important implications for analyzing overmature shale.
MARINE AND PETROLEUM GEOLOGY
(2024)
Article
Computer Science, Interdisciplinary Applications
Mingjun Zhou, Zhenming Shi, Chong Peng, Ming Peng, Kahlil Fredrick E. Cui, Bo Li, Limin Zhang, Gordon G. D. Zhou
Summary: In this paper, the erosion and deposition processes during overtopping dam breaching are simulated using a novel method (ED-SPH). The proposed model is able to capture the complex behaviors of dam soil erosion, entrainment, and depositions. Soil deposition hinders particle movement and reduces water velocity at the water-soil interface.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Geosciences, Multidisciplinary
Muhammad Farhan Ul Moazzam, Sudeep Thakuri, Ghani Rahman, Byung Gul Lee
Summary: This study explores the elevation dependent warming in the Indus River Basin and its impacts on cryospheric and hydrological changes. The results show significant warming trends in the Tmax and Tmin in the upper Indus Basin, with a more prominent trend observed during the winter season for Tmax. These consistent warming trends can have harmful impacts on the cryosphere of the region, leading to water scarcity and extreme droughts.
PHYSICS AND CHEMISTRY OF THE EARTH
(2024)
Article
Computer Science, Interdisciplinary Applications
Yuan Cao, Yan-Guo Zhou, Kyohei Ueda, Yun-Min Chen
Summary: Investigated shear stress responses of enclosed soil in deep soil mixing (DSM) grid-improved ground, and revealed the characteristics of the waist effect and mathematical model for shear stress reduction ratio.
COMPUTERS AND GEOTECHNICS
(2024)
Article
Computer Science, Interdisciplinary Applications
Jinfan Chen, Zhihong Zhao, Jintong Zhang
Summary: This study develops data-driven criteria to estimate the peak shear strength (PSS) of rock fractures, considering the effects of surface roughness features. A high-quality dataset is created using particle-based discrete element method and diamond-square algorithm. Tree-based models and convolutional neural network are trained to predict the PSS of rock fractures, and their reliability is verified using experimental data.
COMPUTERS AND GEOTECHNICS
(2024)
