Article
Mechanics
Xuhang Su, Ning Qi, Xuesong Li, Shengnan Chen, Long He
Summary: This study predicts the main flow path of reactive fluids in complex porous media based on Darcy's law and the control domain theory. By identifying the connectivity possibility between fractures and caves, and considering the geometry of these features, the main flow path of reactive fluids can be accurately estimated.
Article
Mechanics
Long Ju, Baochao Shan, Peiyao Liu, Zhaoli Guo
Summary: This study simulates two-dimensional density-driven convective mixing processes in synthetic porous media at pore-scale using lattice Boltzmann method. Results show that the convective mixing process varies with the Rayleigh number, and different characteristics are observed at different Ra values.
Article
Mechanics
A-M Eckel, R. Pini
Summary: The study numerically investigates convective dissolution in saline aquifers and reveals an acceleration of the mixing process over time, transitioning from diffusive to superdiffusive mixing patterns regardless of Ra. The onset time of convection and the linear reduction of time needed to reach close-to-complete mixing with Ra are significant findings. The non-dimensional mass flux, expressed in terms of the Sherwood number, exhibits a natural logarithmic scaling for Ra <= 2 500.
Article
Geochemistry & Geophysics
Xi Chen, Ying Zhou
Summary: Various methods have been developed to extract primary seawater Sr isotope signals from carbonate rocks, but there is little consensus on the best method due to variations in sample purity and mineralogy. This study used sequential leaching to extract the strontium isotope ratios from argillaceous and dolomitic limestone samples. The results showed that a dilute acetic acid leach was the most effective method, extracting the least altered seawater Sr-87/Sr-86 isotope ratios. The new dissolution method significantly improves the chances of obtaining primary seawater Sr-87/Sr-86 isotope ratios from these limestone samples.
GEOSTANDARDS AND GEOANALYTICAL RESEARCH
(2023)
Article
Energy & Fuels
Shuaiwei Gu, Zhizhong Yang, Zhen Chen, Haiming Wang, Hanzi Liu, Wei Zhang, Changfu You
Summary: The utilization of low-grade limestone in wet flue gas desulfurization has shown promising results due to the higher dissolution rate and better desulfurization performance of finer LGL particles. Characterizations through XRD, SEM, EDS, and ICP-OES analyses revealed that smaller particles of LGL have higher desulfurization capacity and can greatly enhance gypsum crystal formation.
Article
Environmental Sciences
Pardeep Kumar, Saumitra Mukherjee
Summary: Seawater intrusion is a common problem in coastal and island aquifers, especially in developing countries affected by climate change. The complex island hydrology is associated with interactions between groundwater, surface water, and seawater, which are further exacerbated by sea level rise, erratic rainfall, and over-extraction of groundwater. A study in middle Andaman used ionic ratios to assess seawater intrusion and limestone cave effects on groundwater. The integration of hydrogeochemical parameters and ionic ratios in GIS revealed moderately and slightly affected saline regions. Tectonic activities and active lineaments were found to play a major role in seawater intrusion, allowing surface water to recharge groundwater.
JOURNAL OF CONTAMINANT HYDROLOGY
(2023)
Article
Microbiology
Jin Chen, Qing Zhao, Fangbing Li, Xiangwei Zhao, Yang Wang, Limin Zhang, Jinan Liu, Lingbin Yan, Lifei Yu
Summary: Microorganisms play a crucial role in rock deterioration, accelerating soil formation and ecosystem restoration. This study found that factors such as organic acid, inorganic acid, nutrient availability, and water availability affect microbial colonization of sterile limestone. The research also showed that limestone is highly receptive to microbial colonization, with rapid colonization occurring within 60 days.
FRONTIERS IN MICROBIOLOGY
(2023)
Article
Geology
Paul Enos, Elias Samankassou
Summary: The Lofer cyclothems of the Alpine Upper Triassic share many similarities with Holocene sediments of Florida Bay, including symmetrical cycles and similar depositional textures and structures. These similarities suggest that sedimentation patterns at a small scale may be independent of the global climate regime, providing important insights into the Triassic depositional environment and future evolution of modern environments.
Review
Crystallography
Wentao Wang, Congxin Yang, Yuhang You, Huawei Yin
Summary: Liquid lead-bismuth eutectic alloy is a promising coolant for fourth-generation nuclear power systems due to its favorable properties and safety. However, the compatibility with structural steel remains a challenge for its industrial application. This paper reviews the corrosion characteristics of liquid lead-bismuth and the behavior of structural steel in this eutectic. The study summarizes the methods to inhibit corrosion and suggests future research directions.
Article
Materials Science, Multidisciplinary
Junjun Jin, Wei Lu, Zhenghong Fu, Zhongyin Zhu, Wenjing Chen, Guoqing Gou
Summary: This study investigates the corrosion fatigue crack growth (CFCG) in the local zones of A7N01S-T5 aluminum alloy metal inert gas (MIG) welded joints from high-speed train underframes. The results indicate that the base metal (BM) region has the highest rate of CFCG compared to the heat-affected zone (HAZ) and the weld metal (WM) zone. The failure mode of the BM is hydrogen-assisted propagation, while the HAZ and WM exhibit anodic dissolution. The study provides insights into the specific CFCG mechanisms in each zone of aluminum alloy welded joints.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Materials Science, Ceramics
Ben Dillinger, Carlos Suchicital, David Clark
Summary: Previous research has mainly focused on the flow dissolution of complex glasses like those used in nuclear waste encapsulation, while this study specifically examines the effect on lithium disilicate glass. The results indicate that temperature and flow rate have an impact on dissolution, with flow having little effect on silicon dissolution. The higher pH in the static system increases the dissolution of silica. The overall trends are similar to previous research but differ from complex glasses.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Ceramics
Changji Xuan, Wangzhong Mu
Summary: The origin and variation of oxide dissolution profile in the oxide melt is explained for the first time with a mechanism of diffusion-distance-controlled dissolution (DDD). A novel analytical model is derived to present this theory, where the profile shape is governed by the diffusion distance of the dissolved components in the oxide melt. Both temperature and initial viscosity of oxide melt are key factors determining the oxide dissolution kinetics, and this theory can be applied to describe diffusion-limited particle dissolution in a general system.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Engineering, Chemical
Anna-Maria Eckel, Rebecca Liyanage, Takeshi Kurotori, Ronny Pini
Summary: Dissolution trapping is an important mechanism for carbon dioxide storage in deep saline aquifers. Previous experiments mainly focused on 2D systems and did not reflect the subsurface CO2/brine system accurately. In this study, we use X-ray computed tomography to investigate the evolution of the convective mixing process in 3D porous media and observe the impact of hydrodynamic dispersion on longitudinal mixing. Our findings suggest that the finger pattern and counter-current flow structure enhance the spread of solute compared to unidirectional dispersion.
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
(2023)
Article
Engineering, Civil
Lei Gan, Yu Liu, Teng Xu, Lei Xu, Hongying Ma, Weichao Xu
Summary: The effects of roughness and seepage fluids on the seepage characteristics of limestone with rough fractures were investigated. A total of five sets of limestone fracture specimens with the same surface morphology were obtained using 3D scanning and sculpting techniques. The seepage dissolution tests were conducted on the specimens using distilled water and sodium sulfate solutions. A novel method for characterizing the fracture surface morphology was proposed. The study analyzed the seepage parameters and presented a quantitative relationship between joint roughness coefficient and permeability.
JOURNAL OF HYDROLOGY
(2023)
Article
Geology
Ann C. Pizzorusso
Summary: Italy's caves, caverns, and grottoes have served various purposes for humans, from shelter to sustenance and even sanctuaries. Ancient traditions in certain caves involved nursing mothers using mineral-laden liquids for healing purposes, with the purported healing properties traced back to specific microbes and bacteria present in the cloudy waters known as moonmilk.
CARBONATES AND EVAPORITES
(2021)
Article
Geosciences, Multidisciplinary
Georg Kaufmann, Matthias Hinderer, Douchko Romanov
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2016)
Article
Archaeology
Burkart Ullrich, Ronald Freibothe, Henning Zoellner, Ines Beilke-Voigt, Andreas Mehner, Georg Kaufmann
ARCHAEOLOGICAL PROSPECTION
(2016)
Article
Engineering, Civil
Georg Kaufmann, Douchko Romanov
JOURNAL OF HYDROLOGY
(2016)
Article
Engineering, Civil
Georg Kaufmann
JOURNAL OF HYDROLOGY
(2016)
Article
Geography, Physical
Georg Kaufmann, Douchko Romanov
Article
Geosciences, Multidisciplinary
Georg Kaufmann, Douchko Romanov, Thomas Tippelt, Thomas Vienken, Ulrike Werban, Peter Dietrich, Franziska Mai, Frank Boerner
JOURNAL OF APPLIED GEOPHYSICS
(2018)
Article
Engineering, Civil
Franci Gabrovsek, Borut Peric, Georg Kaufmann
JOURNAL OF HYDROLOGY
(2018)
Article
Engineering, Civil
Georg Kaufmann, Douchko Romanov
JOURNAL OF HYDROLOGY
(2019)
Article
Engineering, Civil
Sibo Zeng, Huan Liu, Zaihua Liu, Georg Kaufmann, Qingrui Zeng, Bo Chen
JOURNAL OF HYDROLOGY
(2019)
Article
Engineering, Civil
Georg Kaufmann, Douchko Romanov
JOURNAL OF HYDROLOGY
(2020)
Article
Multidisciplinary Sciences
Sibo Zeng, Zaihua Liu, Georg Kaufmann
NATURE COMMUNICATIONS
(2019)
Article
Geography, Physical
Georg Kaufmann, Douchko Romanov, Ralf Nielbock, Joyce Lundberg
Article
Environmental Sciences
Sibo Zeng, Georg Kaufmann, Zaihua Liu
Summary: This paper evaluates the global applicability of different environmental drivers on carbonate dissolution intensity and carbon sink flux. The study uses ecological models and satellite data to estimate global averages and compares the accuracy of different models. The results highlight the intertwined nature of natural and anthropogenic factors in shaping global carbonate dissolution intensity and carbon sink patterns.
GLOBAL BIOGEOCHEMICAL CYCLES
(2022)
Article
Geosciences, Multidisciplinary
Georg Kaufmann, Franci Gabrovsek, Douchko Romanov
Article
Geosciences, Multidisciplinary
Georg Kaufmann, Franci Gabrovsek, Janez Turk
Article
Engineering, Civil
Arfan Arshad, Ali Mirchi, Javier Vilcaez, Muhammad Umar Akbar, Kaveh Madani
Summary: High-resolution, continuous groundwater data is crucial for adaptive aquifer management. This study presents a predictive modeling framework that incorporates covariates and existing observations to estimate groundwater level changes. The framework outperforms other methods and provides reliable estimates for unmonitored sites. The study also examines groundwater level changes in different regions and highlights the importance of effective aquifer management.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Lihua Chen, Jie Deng, Wenzhe Yang, Hang Chen
Summary: A new grid-based distributed karst hydrological model (GDKHM) is developed to simulate streamflow in the flood-prone karst area of Southwest China. The results show that the GDKHM performs well in predicting floods and capturing the spatial variability of karst system.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Faruk Gurbuz, Avinash Mudireddy, Ricardo Mantilla, Shaoping Xiao
Summary: Machine learning algorithms have shown better performance in streamflow prediction compared to traditional hydrological models. In this study, researchers proposed a methodology to test and benchmark ML algorithms using artificial data generated by physically-based hydrological models. They found that deep learning algorithms can correctly identify the relationship between streamflow and rainfall in certain conditions, but fail to outperform traditional prediction methods in other scenarios.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Yadong Ji, Jianyu Fu, Bingjun Liu, Zeqin Huang, Xuejin Tan
Summary: This study distinguishes the uncertainty in drought projection into scenario uncertainty, model uncertainty, and internal variability uncertainty. The results show that the estimation of total uncertainty reaches a minimum in the mid-21st century and that model uncertainty is dominant in tropical regions.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Z. R. van Leeuwen, M. J. Klaar, M. W. Smith, L. E. Brown
Summary: This study quantifies the effectiveness of leaky dams in reducing flood peak magnitude using a transfer function noise modelling approach. The results show that leaky dams have a significant but highly variable impact on flood peak magnitude, and managing expectations should consider event size and type.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Zeda Yin, Yasaman Saadati, M. Hadi Amini, Linlong Bian, Beichao Hu
Summary: Combined sewer overflows pose significant threats to public health and the environment, and various strategies have been proposed to mitigate their adverse effects. Smart control strategies have gained traction due to their cost-effectiveness but face challenges in balancing precision and computational efficiency. To address this, we propose exploring machine learning models and the inversion of neural networks for more efficient CSO prediction and optimization.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Qimou Zhang, Jiacong Huang, Jing Zhang, Rui Qian, Zhen Cui, Junfeng Gao
Summary: This study developed a N-cycling model for lowland rural rivers covered by macrophytes and investigated the N imports, exports, and response to sediment dredging. The findings showed a considerable N retention ability in the study river, with significant N imports from connected rivers and surrounding polders. Sediment dredging increased particulate nitrogen resuspension and settling rates, while decreasing ammonia nitrogen release, denitrification, and macrophyte uptake rates.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Xue Li, Yingyin Zhou, Jian Sha, Man Zhang, Zhong-Liang Wang
Summary: High-resolution climate data is crucial for predicting regional climate and water environment changes. In this study, a two-step downscaling method was developed to enhance the spatial resolution of GCM data and improve the accuracy for small basins. The method combined medium-resolution climate data with high-resolution topographic data to capture spatial and temporal details. The downscaled climate data were then used to simulate the impacts of climate change on hydrology and water quality in a small basin. The results demonstrated the effectiveness of the downscaling method for spatially differentiated simulations.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Tongqing Shen, Peng Jiang, Jiahui Zhao, Xuegao Chen, Hui Lin, Bin Yang, Changhai Tan, Ying Zhang, Xinting Fu, Zhongbo Yu
Summary: This study evaluates the long-term interannual dynamics of permafrost distribution and active layer thickness on the Tibetan Plateau, and predicts future degradation trends. The results show that permafrost area has been decreasing and active layer thickness has been increasing, with an accelerated degradation observed in recent decades. This has significant implications for local water cycle processes, water ecology, and water security.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Chi Zhang, Xu Zhang, Qiuhong Tang, Deliang Chen, Jinchuan Huang, Shaohong Wu, Yubo Liu
Summary: Precipitation over the Tibetan Plateau is influenced by systems such as the Asian monsoons, the westerlies, and local circulations. The Indian monsoon, the westerlies, and local circulations are the main systems affecting precipitation over the entire Tibetan Plateau. The East Asian summer monsoon primarily affects the eastern Tibetan Plateau. The Indian monsoon has the greatest influence on precipitation in the southern and central grid cells, while the westerlies have the greatest influence on precipitation in the northern and western grid cells. Local circulations have the strongest influence on the central and eastern grid cells.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Manuel Almeida, Antonio Rodrigues, Pedro Coelho
Summary: This study aimed to improve the accuracy of Total Phosphorus export coefficient models, which are essential for water management. Four different models were applied to 27 agroforestry watersheds in the Mediterranean region. The modeling approach showed significant improvements in predicting the Total Phosphorus diffuse loads.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Yutao Wang, Haojie Yin, Ziyi Wang, Yi Li, Pingping Wang, Longfei Wang
Summary: This study investigated the distribution and transformation of dissolved organic nitrogen (DON) in riverbed sediments impacted by effluent discharge. The authors found that the spectral characteristics of dissolved organic matter (DOM) in surface water and sediment porewater could be used to predict DON variations in riverbed sediments. Random forest and extreme gradient boosting machine learning methods were employed to provide accurate predictions of DON content and properties at different depths. These findings have important implications for wastewater discharge management and river health.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Saba Mirza Alipour, Kolbjorn Engeland, Joao Leal
Summary: This study assesses the uncertainty associated with 100-year flood maps under different scenarios using Monte Carlo simulations. The findings highlight the importance of employing probabilistic approaches for accurate and secure flood maps, with the selection of probability distribution being the primary source of uncertainty in precipitation.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Janine A. de Wit, Marjolein H. J. van Huijgevoort, Jos C. van Dam, Ge A. P. H. van den Eertwegh, Dion van Deijl, Coen J. Ritsema, Ruud P. Bartholomeus
Summary: The study focuses on the hydrological consequences of controlled drainage with subirrigation (CD-SI) on groundwater level, soil moisture content, and soil water potential. The simulations show that CD-SI can improve hydrological conditions for crop growth, but the success depends on subtle differences in geohydrologic characteristics.
JOURNAL OF HYDROLOGY
(2024)
Article
Engineering, Civil
Constantin Seidl, Sarah Ann Wheeler, Declan Page
Summary: Water availability and quality issues will become increasingly important in the future due to climate change impacts. Managed Aquifer Recharge (MAR) is an effective water management tool, but often overlooked. This study analyzes global MAR applications and identifies the key factors for success, providing valuable insights for future design and application.
JOURNAL OF HYDROLOGY
(2024)