Environmental Earth Sciences最新文献

{"title":"A combined approach of thermal remote sensing and ground-based measurements for radioactive mineral exploration at the Eastern Coast of India","authors":"Samikshya Mohanty,&nbsp;Santanu Dinda,&nbsp;Nimesh Kotadia,&nbsp;Debashish Sengupta,&nbsp;Biswajit Bera,&nbsp;Somnath Adak","doi":"10.1007/s12665-025-12554-0","DOIUrl":"10.1007/s12665-025-12554-0","url":null,"abstract":"<div><p>This study investigates the potential of thermal remote sensing for delineating radioactive mineral deposits by examining the relationship between land surface temperature and the presence of these minerals. The underlying hypothesis is that radioactive decay, while typically generating heat, can contribute to detectable thermal anomalies in areas with significant concentrations of radioactive minerals. Utilizing Landsat 8 Operational Land Imager, Land Surface Temperature (LST) patterns are analysed in the coastal region, Podampata, Odisha, eastern coast of India and compared with occurrences of radioactive minerals. The Land Surface Temperature in the study area ranges from 19.4 °C to 28.34 °C. Preliminary findings indicate a positive correlation between LST and the presence of radioactive minerals such as monazite and zircon, suggesting that areas with higher LST represent potential targets for mineral exploration. However, the contribution of radioactive decay heat to the observed LST anomalies needs further investigation and validation through ground-based measurements of radioactivity, Thorium (Th), Uranium (U) and Rare Earth Element (REE) enrichment and detailed thermal modeling. The dose rate ranges from 65 to 240 µR/h, with the highest concentrations of thorium and uranium recorded at 39.61 ppm and 16.28 ppm, respectively. The presence of radioactive heavy minerals such as monazite and zircon and other heavy minerals such as ilmenite and rutile are confirmed from this study. Enrichment of light REE compared to heavy REE along with absorption dips around 1 μm, indicates the presence of Sm³⁺, commonly associated with monazite. Finally, integration of results from remotely sensed data and field data was performed to obtain a comprehensive solution for delineation of regions enriched with radioactive minerals. This research highlights the potential of thermal remote sensing as a preliminary tool for the identification of regions suitable for the exploration of radioactive minerals.</p></div>","PeriodicalId":542,"journal":{"name":"Environmental Earth Sciences","volume":"84 20","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145256560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A sequential approach for multiphase reactive transport: coupling PHREEQC with hydrological modeling","authors":"Etienne Ahusborde,&nbsp;Sara Tabrizinejadas","doi":"10.1007/s12665-025-12565-x","DOIUrl":"10.1007/s12665-025-12565-x","url":null,"abstract":"<div><p>This work addresses the challenges associated with reactive transport modeling in environmental applications, such as nuclear waste disposal and geological sequestration of CO<span>(_2)</span>. Due to limited experimental studies in long-term scenarios, numerical simulation is crucial. A thorough survey of existing codes reveals mainly two types of numerical approaches for reactive flows: global implicit and sequential or operator splitting approaches. Sequential approaches allow specific programming for hydrological and chemical processes. The objective is to develop a reactive transport package that couples PHREEQC for chemical aspects and DuMu<span>(^X)</span> for hydrological aspects. The operator splitting method is implemented in a non-iterative sequential approach and a comprehensive description of the mathematical formulation is presented. The spatial discretization employs a cell-centered finite volume method with an implicit Euler scheme for time discretization. The model has been developed and implemented for both single-phase and two-phase flows. Its efficiency and robustness have been validated through a series of numerical experiments, ranging from single-phase benchmarks to complex two-phase flow scenarios. The methodology has been tested notably in two- and three-dimensional configurations, including high-performance computing, thereby demonstrating its relevance for realistic applications.</p></div>","PeriodicalId":542,"journal":{"name":"Environmental Earth Sciences","volume":"84 20","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145256558","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Competitive mechanisms of thermal and chemical permeability enhancement effects under the influence of CO2-H2O-coal interaction temperature","authors":"Yu Shi,&nbsp;Baiquan Lin,&nbsp;Ting Liu,&nbsp;Tao Huang","doi":"10.1007/s12665-025-12603-8","DOIUrl":"10.1007/s12665-025-12603-8","url":null,"abstract":"<div><p>Utilizing the thermal and chemical permeability enhancement effects of hot flue gas can effectively improve the gas permeability of deep coal seams. However, the competitive permeability enhancement mechanism between thermal and chemical effects caused by temperature changes in the CO₂-H₂O-coal interaction remains unclear, and the theoretical model that can capture the permeability changes induced by the coupled thermal and chemical effects has rarely been mentioned. Therefore, it is of great significance to explore the influence of the coupled thermal and chemical effects on coal permeability and further establish an appropriate permeability model for gas production capacity forecast. In this paper, the reaction solution pH, soluble mineral content, and coal permeability under different treating temperatures were first tested and analyzed based on a self-built CO₂-H₂O-coal interaction platform. Subsequently, a permeability model considering the coupling of thermal effects (thermal damage, thermal expansion, and dissolution weakening) and chemical effects (mineral dissolution, inward expansion of matrix strengthening, and fracture modulus degradation) was established and matched with experimental data. Finally, the magnitude of permeability enhancement resulting from thermal and chemical effects was quantitatively analyzed based on the verified permeability model. The research can provide theoretical guidance for the application of hot flue gas to enhance permeability in deep coal seams.</p></div>","PeriodicalId":542,"journal":{"name":"Environmental Earth Sciences","volume":"84 20","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145256360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Evaluation on the sealing capacity of caprocks in underground gas storage by measuring breakthrough pressure under complex stress paths","authors":"Shengnan Ban,&nbsp;Hejuan Liu,&nbsp;Chunhe Yang,&nbsp;Xilin Shi,&nbsp;Haizeng Pan,&nbsp;Weimin Wang,&nbsp;HongWei Wang","doi":"10.1007/s12665-025-12533-5","DOIUrl":"10.1007/s12665-025-12533-5","url":null,"abstract":"<div><p>Natural gas plays a critical role in advancing national energy transitions. Increasing underground natural gas storage capacity is essential for ensuring energy supply security. The operation of underground natural gas storage results in cyclic stress variations in formation that can significantly affect the pore structures and sealing performance of caprocks. This study investigates the impacts of lithology, permeability, and cyclic loading on the sealing capacity of caprocks. Using a self-developed experimental device, the breakthrough pressure under alternating loads was measured. Results indicate that the breakthrough pressure varies by lithology in the following the order: rock salt &gt; mudstone &gt; shale &gt; muddy siltstone (MS) &gt; silty mudstone (SM) &gt; volcanic rock (VS) &gt; marlstone &gt; sandstone. A functional relationship exists between rock permeability and breakthrough pressure. However, variations in rock composition cause notable variations in the parameters of this relationship. The breakthrough pressure increases linearly with the confining pressure. For example, when the confining pressure is increased from 5 MPa to 30 MPa, the breakthrough pressure of argillaceous siltstone rises from 0.73 MPa to 12.2 MPa, that of mudstone rises from 0.7 MPa to 9.5 MPa, and that of marlstone rises from 0.6 MPa to 5.5 MPa. The cyclic loading experimental results demonstrate that cyclic stress affects caprock sealing capacity. The dynamic breakthrough pressures increased by 12%, 14%, and 7% compared to values under static state, respectively. It highlights the impact of cyclic stress on caprock sealing and provide valuable insights for improving the safety and efficiency of underground gas storage systems.</p></div>","PeriodicalId":542,"journal":{"name":"Environmental Earth Sciences","volume":"84 20","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145256399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recurrent adversarial learning for geo-technical time-series augmentation: application to slope instability forecasting in open-pit mines","authors":"Bangsheng An,&nbsp;Zhijie Zhang,&nbsp;Jintong Ren,&nbsp;Wanchang Zhang","doi":"10.1007/s12665-025-12566-w","DOIUrl":"10.1007/s12665-025-12566-w","url":null,"abstract":"<div><p>Slope instability in open-pit mines represents a critical geological engineering hazard, characterized by frequent catastrophic failures that jeopardize both operational safety and economic sustainability. Conventional data-driven displacement prediction models exhibit pronounced performance degradation under small-sample conditions, significantly impeding their practical applicability. To address this challenge, this study introduces an innovative hybrid framework integrating Recurrent Generative Adversarial Network (RGAN)-based data augmentation with Simulated Annealing (SA)-optimized Support Vector Regression (SVR). The proposed RGAN architecture synthesizes geo-technical time-series data that strictly adheres to the statistical distribution of real-world monitoring datasets, while the SA algorithm dynamically optimizes SVR hyper-parameters to bolster predictive robustness. Comprehensive experimental validation demonstrates that models trained on augmented datasets achieve a 33.16% reduction in mean absolute error (MAE) relative to baseline models employing solely original data. Sensitivity analyses further reveal an optimal synthetic-to-real data ratio of 1:1 for peak predictive performance. The principal contributions of this work are threefold: (1) development of a domain-specific RGAN architecture tailored for geo-technical time-series augmentation, (2) establishment of an integrated pipeline synergizing data generation with model optimization, and (3) provision of a scalable solution for small-sample learning in slope stability prediction. This research advances intelligent early-warning systems by proposing a data-efficient paradigm for high-risk slope monitoring applications.</p></div>","PeriodicalId":542,"journal":{"name":"Environmental Earth Sciences","volume":"84 20","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145256395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Retention of metals in Sepetiba Bay (SE Brazil) conditioned by Climatic conditions and oceanic front placement","authors":"Amanda Pacheco Seixas,&nbsp;Maria Virgínia Alves Martins,&nbsp;Heloisa Helena Gomes Coe,&nbsp;Karina Ferreira Chueng,&nbsp;Rubens Cesar Lopes Figueira,&nbsp;Paulo Alves de Lima Ferreira,&nbsp;Egberto Pereira,&nbsp;Denise Lara,&nbsp;Luzia Antonioli,&nbsp;Rodolfo Dino,&nbsp;Josefa Varela Guerra,&nbsp;Antonio Tadeu dos Reis,&nbsp;Renata Cardia Rebouças,&nbsp;Caroline Adolphsson do Nascimento,&nbsp;André Luiz Carvalho da Silva,&nbsp;João Wagner Alencar Castro,&nbsp;Fernando Rocha,&nbsp;Renata Cardia,&nbsp;André Luiz Carvalho da Silva -","doi":"10.1007/s12665-025-12513-9","DOIUrl":"10.1007/s12665-025-12513-9","url":null,"abstract":"<div><p>Sepetiba Bay (SB) in Rio de Janeiro State, Brazil, plays a vital role for local fishermen, farmers, holidaymakers, and residents. However, these communities are facing a pressing problem, since the bay has been significantly polluted by sewage, urban and industrial effluents and maritime activities, particularly since the latter half of the 20th century. The inner area of the SB is heavily contaminated with metals and is experiencing processes of silting and eutrophication. The urgent need to address this pollution is one of the major concerns confronting humanity today. The transfer of pollutants from transitional waters to the ocean can disrupt biogeochemical cycles, disturb the balance of natural ecosystems, impact marine food webs, and pose risks to human health. This study examines the factors influencing the temporal record of natural and anthropogenic impacts in the outer region of SB, aiming to provide crucial insights for addressing this urgent issue. This will be achieved through a multi-proxy approach that includes analyses of grain size, mineralogy, geochemistry and silica phytoliths along the core SP16, collected between Itacuruça and Jaguanum islands, an intermediate region of Sepetiba Bay. The age model of this core was estimated using ²¹⁰Pb and ¹³⁷Cs methods. Although silica biomineralization has been frequently applied in continental areas of Brazil, studies conducted on environmental evolution in coastal sediments using silica phytoliths as bioindicators of sediment sources and paleoclimatic conditions are rare. The SP16 core with an average mass sedimentation rate of 0.26 ± 0.03 g cm⁻² yr⁻¹ records the period from 1878 to 2022. The findings indicate that the human interventions in the Guandu River basin, the most important in the region, rainfall regime, the positioning of oceanic fronts, and the stratification of water masses have influenced the sedimentological (including granulometric, mineralogical, and geochemical), oxygenation, and diagenetic characteristics of the sediments in the external area of SB. During periods of reduced rainfall, turbid river plumes are confined to the inner region of the SB, allowing oceanic fronts to develop close to the continent. These conditions enhance the retention of metals and organic matter in the internal area of the SB, which is currently experiencing significant metal contamination and eutrophication. Conversely, during periods of increased rainfall, the extension of the turbid river plumes to the outer region of the SB and the heightened stratification of water masses promote the accumulation of fine sediments in more distal zones. The results suggest that phytoliths can provide important information in paleoenvironmental reconstruction studies in coastal marine environments.</p></div>","PeriodicalId":542,"journal":{"name":"Environmental Earth Sciences","volume":"84 20","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12665-025-12513-9.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210620","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Correction: Effects of flow velocity and concentration on the overtopping failure mechanism of tailings dams","authors":"Kunpeng Zhao,&nbsp;Zhao Deng,&nbsp;Shengshui Chen,&nbsp;Qiming Zhong,&nbsp;Yao Chao,&nbsp;Junfeng Jiang","doi":"10.1007/s12665-025-12613-6","DOIUrl":"10.1007/s12665-025-12613-6","url":null,"abstract":"","PeriodicalId":542,"journal":{"name":"Environmental Earth Sciences","volume":"84 20","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210827","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modelling artificial infiltration through the vadose zone in the unconfined coastal aquifer of Dar Es Salaam (Tanzania): a preliminary assessment for a managed aquifer recharge (MAR) solution","authors":"Francesco Maria De Filippi,&nbsp;Giuseppe Sappa,&nbsp;Liana Ricci,&nbsp;Federica Giaccio","doi":"10.1007/s12665-025-12556-y","DOIUrl":"10.1007/s12665-025-12556-y","url":null,"abstract":"<div><p>Groundwater is an essential source of freshwater worldwide. In urban and peri-urban areas of Sub-Saharan Africa cities, such as Dar es Salaam (Tanzania), the scarcity of good quality surface water has led to the overexploitation of the aquifer, due to the growing demand for water linked to the demographic and economic development of the city. This has also caused the phenomenon of saltwater intrusion degrading the quality of groundwater resources. In addition, rapid urban expansion and the consequent increase in impermeable areas, hindering infiltration, have led to a reduction in groundwater recharge with significant water table decrease. This study explores the potential of managed aquifer recharge (MAR) as a sustainable solution for integrated water resource management by assessing their suitability in selected areas of Dar es Salaam City. The infiltration process has been modelled with SEEP-W software, considering different basins with embankments and two scenarios: a constant head water volume given by a flooding event and a high intensity precipitation event inducing the storage of rainfall water. The results show that MAR can represent a useful tool for integrated water resource management in the study area with the potential to effectively enhance groundwater sustainability and contributing to more resilient urban water systems in the city.</p></div>","PeriodicalId":542,"journal":{"name":"Environmental Earth Sciences","volume":"84 20","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12665-025-12556-y.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatiotemporal evolution model of protected coal seam permeability before and after first fracture of overlying key strata: a case study of Mengjin coal mine","authors":"Yanyan He,&nbsp;Yanwei Liu,&nbsp;Hongkai Han,&nbsp;Weiqin Zuo,&nbsp;Ping Chang,&nbsp;Guozhong Hu,&nbsp;Can Shi","doi":"10.1007/s12665-025-12516-6","DOIUrl":"10.1007/s12665-025-12516-6","url":null,"abstract":"<div><p>The fracture movement of the overlying key strata (OKS) significantly impacts the permeability evolution of protected coal seam (PDCS), with distinct variation patterns observed before and after the first fracture. However, a spatiotemporal evolution model has not yet been established. This paper proposes a method for constructing a spatiotemporal evolution model of PDCS permeability. A model was developed, applied, and validated based on the conditions of Mengjin coal mine to elucidate the effects of OKS fracture movement on PDCS permeability evolution. The results show that at the test site, only KS₁ fractures. Before the first fracture, the PDCS permeability increased slightly, with a maximum of 6.9 times the initial permeability. Within 6 m of the fracture, the permeability increased sharply by 148–169 times, peaking at 190–3,372 times before the first square dimension. Subsequently, the compaction effect of the goaf became evident, causing the permeability to decrease by 92–1,198 times, while the permeability valley region increased steadily after the second square dimension. The peak permeability period occurred 18–213 m behind the working face. Overall, OKS fracture movement governs the permeability evolution by controlling the stress field and the deformation of the coal and rock structures.</p></div>","PeriodicalId":542,"journal":{"name":"Environmental Earth Sciences","volume":"84 20","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210618","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"An energy based constitutive model of water-saturated frozen rock","authors":"Xunjie Hu,&nbsp;Xin Liu,&nbsp;Zhenyang Xu,&nbsp;Jianyu Zhao","doi":"10.1007/s12665-025-12538-0","DOIUrl":"10.1007/s12665-025-12538-0","url":null,"abstract":"<div><p>To study the effects of cold region climatic characteristics and excavation disturbance on the mechanical properties of rocks, a constitutive model was established. Dynamic compression test were conducted on red sandstone using a split Hopkinson pressure bar (SHPB) to investigate the combined effects of freezing temperature and impact pressure. The results show that the stress-strain curve of the specimen did not exhibit a compaction stage, and the elastic deformation stage was very small, accounting for approximately 2.1% of the total stress-strain curve. The dynamic compressive strength increased as the freezing temperature decreased, and there was a strain-rate enhancement effect. The energy absorbency rate (<i>η</i>) increased with the decrease in freezing temperature, and it remained constant at around 40%, unaffected by changes in impact pressure. At high freezing temperatures and low impact pressures, the degree of fragmentation decreased, and the fractal dimension reduced. From a micromechanical perspective, the action mechanisms of freezing temperature and impact pressure on the rock were explained. A dynamic constitutive model for saturated frozen red sandstone was established based on energy theory, and compared with experimental results. This research provides theoretical guidance for the study of rock properties and engineering construction in cold regions.</p></div>","PeriodicalId":542,"journal":{"name":"Environmental Earth Sciences","volume":"84 20","pages":""},"PeriodicalIF":2.8,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145210619","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}