Geosystems and Geoenvironment最新文献

{"title":"Modelling environmental fragility in an industrial landscape: An integrated remote sensing-GIS framework for sustainable planning in Brahmani-Dwarka Interfluve","authors":"Bhaskar Mandal,&nbsp;Kaushalendra Prakash Goswami,&nbsp;Sharmistha Mondal","doi":"10.1016/j.geogeo.2025.100460","DOIUrl":"10.1016/j.geogeo.2025.100460","url":null,"abstract":"<div><div>Evaluating environmental vulnerability is crucial for efficient and sustainable management, particularly in regions that are ecologically sensitive and experiencing rapid transformations. Thus, the main goal of this study is to evaluate the environmental fragility of the Brahmani-Dwarka Interfluve by integrating key natural and human-induced factors through the analytical hierarchy process (AHP) and fuzzy analytical hierarchy process (FAHP) within a remote sensing and geographic information systems (RS-GIS) framework. To achieve this, ten unique factors influencing potential environmental fragility (PEF) were analyzed, along with four new factors to tackle emerging fragility (EEF). This study holds significant value as it focuses on a region profoundly affected by stone crushing industries, which encounter considerable threats of environmental harm. The results of the PEF model showed that high and very high fragility zones accounted for 23.96% and 22.38% of the area, according to the AHP and FAHP models. Similarly, EEF models highlighted a growing fragility, with FAHP and AHP indicating that 27.85% and 16.80% of the region were categorized as having high and very high fragility. Hotspot analysis indicated that environmentally fragile hotspots constituted 21.07% and 31.46% of the area in the AHP and FAHP-based models, respectively. ROC validation indicated that FAHP demonstrated superior performance compared to AHP in both PEF and EEF models, highlighting its exceptional predictive accuracy and reliability. The observed negligible difference between high and low sensitive parameters was 0.866% in FAHP-based PEF and 0.532% in FAHP-based EEF, indicating the models’ reliability. The findings of the study will help policymakers, planners, and stakeholders to develop environmentally resilient strategies and policies as well as achieve sustainability in the study region.</div></div>","PeriodicalId":100582,"journal":{"name":"Geosystems and Geoenvironment","volume":"5 1","pages":"Article 100460"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Geochemical and mineralogical constraints on lithium mineralization in rare-metal pegmatites of the Amareshwar region, Eastern Dharwar Craton, India","authors":"C.S. Sindhuja ,&nbsp;M. Satyanarayanan ,&nbsp;Srijita Banerjee ,&nbsp;Soumi Chatterjee","doi":"10.1016/j.geogeo.2025.100439","DOIUrl":"10.1016/j.geogeo.2025.100439","url":null,"abstract":"<div><div>Around 50 percent of global lithium resources are hosted in the rare-metal pegmatites. The present study deals with whole-rock geochemistry as well as zinnwaldite mineral chemistry of rare-metal pegmatites from Amareshwar, Gurugunta schist belt, Eastern Dharwar Craton to understand the source of lithium bearing ore fluids in these pegmatites and to evaluate their mineralization potential. Detailed petrography and mineral chemistry of Amareshwar pegmatites indicate that lithium is hosted in both spodumene and zinnwaldite. The zinnwaldite mineral chemistry elucidates the incorporation of lithium in mica crystal lattice along the vector Al₂(R²⁺)_–3. The whole rock geochemical signatures suggest that these pegmatites are alkaline to calc-alkaline in nature, peraluminous and emplaced in S-type and syn-collisional tectonic setting. The chondrite normalized REE patterns are characterized by prominent negative Eu anomalies coupled with significant LREE enrichment and HREE depletion indicating fractional crystallization with plagioclase separation. Elevated concentrations of Li (Avg. = 1355 ppm), Cs (Avg. = 246 ppm), Ta (Avg. = 124 ppm), Sr (Avg. = 105 ppm) and Rb (Avg. = 2234 ppm) coupled with their geochemical characteristics classify them as LCT type of rare-metal pegmatites. The relationship between La/Ta versus Mg/Li and Zr/Hf versus Nb/Ta attest that the studied samples are lithium mineralized pegmatites of magmatic-hydrothermal origin. Extremely low ratios of Mg/Li (0.004), K/Rb (0.004), K/Cs (0.05), K/Ba (0.07), Al/Ga (0.23) fingerprint that these pegmatites have evolved from highly fractionated, fertile parental granitic magma having promising economic potential.</div></div>","PeriodicalId":100582,"journal":{"name":"Geosystems and Geoenvironment","volume":"5 1","pages":"Article 100439"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144896118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Paradox of the Сrystal peaceful underground nuclear explosion site (Yakutia, 1974): Evidence from electrical resistivity tomography and water runoff chemistry","authors":"Svetlana Yurievna Artamonova","doi":"10.1016/j.geogeo.2025.100467","DOIUrl":"10.1016/j.geogeo.2025.100467","url":null,"abstract":"<div><div>This paper comprehensively discusses data from electrical resistivity tomography, land geomagnetic surveys, radionuclides, and the major-ion chemistry of water flowing at the epicenter of the Crystal peaceful underground nuclear explosion (it was carried out in 1974). The integrity of the seal at the emplacement hole cap was compromised during the explosion, the soils at the epicenter were contaminated by radionuclides. To immobilize these radionuclides cryogenically and prevent migration of radionuclides from the central explosion area (at a depth of 98 meters), the head of the emplacement hole and its surroundings were buried in 1992 with block-rubble stone material composed of pure limestone and dolomite fragments. Additionally, the block-rubble artificial cover was further reinforced in 2006. The artificial cover is revealed to remain unfrozen and waterlogged nowadays. Snowmelt and rainwater are observed to seep through this cover, while air convection within it likely leads to the condensation of atmospheric moisture. The bicarbonate magnesium-calcium waters that originate from the percolation of rain, melted snow, and atmospheric condensate through the cover are enriched with technogenic ions such as SO₄²⁻, Mg²⁺, Ca²⁺, Li⁺, K⁺, and Sr, alongside natural components like Cl⁻, Mg²⁺, Ca²⁺, K⁺, Na⁺, Br, Sr, I, and Li⁺, which are derived from underground natural gas-brine fluids that rise along the open emplacement hole and the damage zone. It is hypothesized that Li⁺ could be a component of the nuclear explosive device. Given the low current activity of radionuclides in water flowing from beneath the artificial cover (measured in Bq/dm³): ³H, 4–12; ⁹⁰Sr, 0.004–0.4, and diminishing levels of ²³⁹^,²⁴⁰Pu (&lt;10⁻⁶), the current migration of technogenic radionuclides with water is assessed as insignificant. Therefore, there is no immediate need for additional measures to strengthen or modify the block-rubble artificial cover.</div></div>","PeriodicalId":100582,"journal":{"name":"Geosystems and Geoenvironment","volume":"5 1","pages":"Article 100467"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145618227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Paleoproterozoic rift-related volcanism and associated ore mineralization in the Alwar Basin, India","authors":"R. Sajeev ,&nbsp;Dinesh Pandit ,&nbsp;M. Santosh ,&nbsp;Cheng-Xue Yang","doi":"10.1016/j.geogeo.2025.100455","DOIUrl":"10.1016/j.geogeo.2025.100455","url":null,"abstract":"<div><div>Alwar Basin, located within the North Delhi Fold Belt (NDFB) of India, is a key area to study the processes of Precambrian geological history and related mineralization. In this study, we document two discrete pulses of volcanic activity in the Alwar Basin, dated at 1.865 ± 0.021 Ga and 1.635 ± 0.017 Ga, recorded by weighted‐mean zircon U–Pb ages. These episodic eruptions generated a compositional spectrum from basalt through rhyolite, emplacing volcanic sequences in a shallow‐marine, within‐plate rift environment. Subsequent percolation of metal‐rich hydrothermal fluids – driven by sustained heat flux and extensional fracturing – focused along stratigraphic contacts and pre‐existing weak planes, precipitating Cu–Pb–Zn sulfide mineralization within quartz–carbonate veins. Geochemical signatures, including peraluminous major‐ and trace‐element patterns and characteristic REE anomalies, further attest to syn-rift magma evolution and crustal assimilation. This pulsatory volcanism and linked hydrothermal activity were pivotal in concentrating base metals, revealing the interplay between Precambrian rifting and ore genesis in the North Delhi Fold Belt.</div></div>","PeriodicalId":100582,"journal":{"name":"Geosystems and Geoenvironment","volume":"5 1","pages":"Article 100455"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145095447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Paleo-weathering and paleoclimate of the Miocene syn-rift sandstones in the Midyan Basin, NW Saudi Arabia: Petrographic and geochemical constrains","authors":"Madyan A. Yahya ,&nbsp;Hamdalla A. Wanas ,&nbsp;Faisal A. Alqahtani ,&nbsp;Amara Masrouhi ,&nbsp;Murad R. Abdulfarraj","doi":"10.1016/j.geogeo.2025.100451","DOIUrl":"10.1016/j.geogeo.2025.100451","url":null,"abstract":"<div><div>This study aims to investigate the provenance, tectonic setting, paleo-weathering, and paleoclimate of sandstones of the syn-rift Oligocene?-Middle-Miocene Sharik and Nutaysh formations in the Midyan Basin, located in the northwestern portion of Saudi Arabia. This has been achieved by a multidisciplinary approach combining fieldwork, petrographic analysis, and bulk-rock geochemistry (major, trace and rare earth elements) of sandstones of the Sharik and Nutaysh formations. Integrated petrographic and geochemical data indicate that the studied sandstones are predominantly of sublithic and subarkose arenites. These sandstones were mainly derived from felsic plutonic igneous (mainly granite) and volcanic (mainly andesite and rhyolite tuff) rocks, with a lesser contribution from recycled sedimentary (mainly sandstone, mudrock and chert) and metamorphic (mainly gneiss) sources. These source rocks are typical of a craton interior with notable input from transitional continental and quartzose recycled orogenic tectonic provenance. They were belonged to the nearby Neoproterozoic basement rocks located in the northwest of the study area, as indicated by paleocurrent direction. These source rocks were tecttonically linked to an active continental margin to a continental island arc. These tectonic settings were subsequently influenced by rifting, as evidenced by discrimination function diagrams based on the high-and low-silica sandstone samples. In terms of paleoweathering and paleoclimate,the studied sandstones experienced a week to moderate chemical weathering under semi-arid to semi-humid climatic condition (low to moderate rainfall ranges from 250 to 1000 mm per year). With respect to tectono-sedimentary evolution, the alluvial sandstones of the Sharik Formation were deposited during the initial stages of continental extension and gradual subsidence linked to the early syn-rift phase in the Oligocene?-Early Miocene. The deposition of the deep-sea sandstones of the Nutaysh Formation were deposited during a period of accelerated subsidence in the Early-Middle Miocene, corresponding to the rift climax. Findings of the present study is consistent with the Oligo-Miocene broader tectono-sedimentary evolution of the region.</div></div>","PeriodicalId":100582,"journal":{"name":"Geosystems and Geoenvironment","volume":"5 1","pages":"Article 100451"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144916568","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Uncovering the Late Cretaceous paleoenvironment and paleoclimate of the Agbaja Plateau, Bida Basin, Nigeria: An inorganic geochemical analysis of shales and implications for organic matter enrichment","authors":"Olusola J. Ojo ,&nbsp;Suraju A. Adepoju ,&nbsp;Ayodeji Awe ,&nbsp;Moses O. Adeoye ,&nbsp;Emmanuel G. Olumayede ,&nbsp;Otobong S. Ndukwe ,&nbsp;Sikiru O. Abdulraman ,&nbsp;Abdulrazaq K. Haruna ,&nbsp;Yusuf A. Jimoh","doi":"10.1016/j.geogeo.2025.100452","DOIUrl":"10.1016/j.geogeo.2025.100452","url":null,"abstract":"<div><div>The bulk geochemical composition of the shale samples of the Maastrichtian Patti Formation exposed at the Agbaja Plateau, southern Bida Basin, Nigeria was studied using X-ray fluorescence (XRF) and inductive coupled plasma mass spectrophotometry (ICPMS) techniques. The objectives of this study are to decipher their paleoenvironment, palaeoclimate and examine the influence of the paleogeographic conditions on the hydrocarbon source rock potential. The geochemical proxies indicate that the shales were deposited under oxic and warm and humid conditions. The plots of V/(V + Ni) vs. U/Th and Ni/Co vs. U/Th support the oxic setting for the shales. The slight Ce anomalies (0.93–1.26), ΣREE (39.40–1607.37 ppm) and (La/Yb)_N ratio (4.11–10.78 ppm) are in support of the sub-oxic to oxic condition. The studied shales show Th/U values from 1.98 to 4.38 which indicates prevalence of high primary paleoproductivity. The clustering of the analyzed samples near the A-K line in the A-CN-K (Al₂O₃-CaO + Na₂O-K₂O) ternary diagram depicts an intense chemical weathering in the source region. In conclusion, the obtained paleogeographic scenario in the study area (warm temperature, high precipitation, oxic to dysoxic condition, and moderate to high primary paleoproductivity) typical of the west Africa upper Cretaceous and freshwater to brackish water environment would have supported the development of moderate organic matter rich source beds with potential for gas and oil in the Bida Basin. This study has underscored the significance of understanding the interplay between sedimentary environment, organic productivity and organic matter enrichment in predicting and exploring hydrocarbon source rocks.</div></div>","PeriodicalId":100582,"journal":{"name":"Geosystems and Geoenvironment","volume":"5 1","pages":"Article 100452"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145019026","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Morphological, mineralogical and geochemical characterization of Ngaoundal soils (Adamawa-Cameroon): Implications for weathering mechanisms and trajectories in tropical zones","authors":"Abdoul Aboubakar ,&nbsp;Ilalie Bertille Kentsa Manefouet ,&nbsp;Loique Rodolph Mbounou Azefack ,&nbsp;Yannick Langollo Tchedele ,&nbsp;Dalil Adoulko ,&nbsp;Demonstel Yvan Ntomb ,&nbsp;Abakar Mahamat ,&nbsp;Jacques Wadjou Wassouo ,&nbsp;Quentin marc Anaba Fotze","doi":"10.1016/j.geogeo.2025.100450","DOIUrl":"10.1016/j.geogeo.2025.100450","url":null,"abstract":"<div><div>Ngaoundal, located in the Adamaoua region of Cameroon, has a tropical climate and is known for its characteristic soils. The aim of the present study was to evaluate the action of weathering on Ngaoundal's lateritic soils. Morpho-structural, mineralogical and geochemical analyses enabled us to carry out this study. The morphological study carried out on 15 soil samples shows a variation in colour from reddish (2.5YR 5/8) to dark brown (7.5YR 6/8), varying from reddish yellow (7.5YR 6/8), orange brown (10YR 5/6) and yellowish brown (10YR 5/4), and have clayey to sandy-clayey matrices with nodules of the order of millimetres to centimetres. X-ray diffractometry and x-ray fluorescence show the following mineral phases in Ngaoundal's lateritic soils: quartz, goethite, gibbsite, kaolinite, hematite, magnetite, anatase and boehmite. Geochemical analysis of these soils shows high average levels of SiO₂ (36.41 %), Fe₂O₃ (31.48 %) and Al₂O₃ (17.72 %), and low average levels of TiO₂ (1.02 %) and CaO (0.36 %), which characterise characteristic soils rich in ferruginous oxide and alumina oxide. The weathering indices of Ngaoundal soils (sesquioxide ratio) vary between 0.22 and 2.98 with an average of 1.09. This average value qualifies these soils as lateritic soils rich in gibbsite and kaolinite (average CIA = 96.38 %) and resulting from chemical alteration of the hydrolysis type (alloying and monosiallitisation).</div></div>","PeriodicalId":100582,"journal":{"name":"Geosystems and Geoenvironment","volume":"5 1","pages":"Article 100450"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895609","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Urbanization induced heat wave risk assessment of Khulna City, Bangladesh: A 30-years analysis of land surface temperature, climate trends and forecasting","authors":"Nusrat Jahan Suborna ,&nbsp;Raian Islam Evan ,&nbsp;Mostafa Jaman Rabby ,&nbsp;Maksudur Rahman ,&nbsp;Arabe Khan ,&nbsp;Md Mahmudul Hasan Rakib ,&nbsp;Rahat Khan ,&nbsp;Irteja Hasan ,&nbsp;Dhiman Kumer Roy","doi":"10.1016/j.geogeo.2025.100448","DOIUrl":"10.1016/j.geogeo.2025.100448","url":null,"abstract":"<div><div>This study examines how urbanization has influenced heatwave risk in Khulna, Bangladesh, from 1993 to 2023 by analyzing changes in land surface temperature (LST) and land use land cover (LULC) using satellite imagery and statistical methods. Over the 30‐year period, mean LST rose by 7 °C, with 23.7 % of Khulna now classified as an excessive heat zone. The Mann–Kendall (MK) test and Sen’s slope (SS) estimator confirm a significant warming trend, particularly during the warmest months. Pearson correlation (PC) analysis indicates a negative relationship between temperature and humidity, exacerbating heatwave severity. LULC results reveal that urbanized areas have expanded approximately threefold while vegetation cover has decreased by nearly 50 %. Using a seasonal-trend decomposition based on LOESS with an auto regressive integrated moving average (STL‐ARIMA) model, the study forecasts 29 additional heatwave days exceeding 36 °C over the next five years. This projection suggests a likely intensification of the urban heat island (UHI) effect driven by rapid urban growth and diminished natural spaces, heightening heat‐related hazards. The findings support the need for sustainable urban development strategies in Khulna, such as increasing green cover and improving water management to inform policy interventions aimed at mitigating rising heat risks in the city’s expanding urban environment.</div></div>","PeriodicalId":100582,"journal":{"name":"Geosystems and Geoenvironment","volume":"5 1","pages":"Article 100448"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144863948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Interpretation of gravity-seismic joint inversion and its application in Longmenshan region","authors":"Wenyue Zhou,&nbsp;Yanyun Sun,&nbsp;Wan Zhang,&nbsp;Guotao Yao,&nbsp;Ruohan Wu","doi":"10.1016/j.geogeo.2025.100469","DOIUrl":"10.1016/j.geogeo.2025.100469","url":null,"abstract":"<div><div>Analysis and research of large complex phenomena before and after the devastating earthquake is of great significance to reduce the threat of natural disasters. Understanding the complex structural deformation of the Longmenshan Fault Zone is essential for elucidating crustal deformation and seismic dynamic mechanisms. This paper analyzes the gravity anomaly distribution characteristics in the Wenchuan Earthquake zone, and subsequently applies edge detection method to invert the pre-earthquake gravity anomalies of the Longmenshan region. The fault distribution characteristics in the Longmenshan region and its adjacent areas before the earthquake have been determined. Besides, morphology difference and possible earthquake formation have been analyzed through the Euler deconvolution results of gravity anomaly profile before and after the earthquake. Finally, a 2-D interactive joint inversion was performed based on the existing seismic and gravity data. The subsurface structure was revealed, and the earthquake formation mechanism was discussed by comparing the underground changes before and after the event.</div></div>","PeriodicalId":100582,"journal":{"name":"Geosystems and Geoenvironment","volume":"5 1","pages":"Article 100469"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145464838","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Developing a riverbank erosion susceptibility index: A pragmatic approach to reveal the level of vulnerability in coastal Bangladesh","authors":"Arabe Khan ,&nbsp;Md Mahmudul Hasan Rakib ,&nbsp;Irteja Hasan ,&nbsp;Apurba Roy ,&nbsp;Mehedi Hasan Ovi ,&nbsp;Md Mostafa Jaman Rabby ,&nbsp;Raian Islam Evan ,&nbsp;Nusrat Jahan Suborna ,&nbsp;Maksudur Rahman ,&nbsp;Rahat Khan ,&nbsp;Dhiman Kumer Roy","doi":"10.1016/j.geogeo.2025.100459","DOIUrl":"10.1016/j.geogeo.2025.100459","url":null,"abstract":"<div><div>Riverbank erosion is one of the significant natural hazards affecting the livelihoods of communities living along riverbanks in Bangladesh. This study develops a novel riverbank erosion susceptibility index (RESI) to quantitatively assess community susceptibility to this hazard. The RESI framework integrates five core dimensions: exposure, susceptibility, sensitivity, adaptability, and resilience, encompassing 34 context-specific indicators derived from household surveys, interviews, and field observations. The RESI scoring scale ranges from -1 (most resilient) to +1 (most susceptible), where higher positive scores indicate greater susceptibility to riverbank erosion. The findings in this study conclude that Chadpur Union is the most susceptible (RESI score: 0.47), followed by Shambupur (0.36) and Chanchra (0.29) union. These scores are further validated with historical remote-sensing analysis, and sensitivity tests show that varying indicator weights (equal, expert, or PCA) do not change the relative union ranking, underscoring the model’s robustness. The analysis highlights key drivers of vulnerability: frequent erosion occurrences, high population density along riverbanks, considerable losses in land and assets, and recurrent displacement due to erosion. All three unions are facing significant challenges in building adaptability and resilience, as indicated by low scores in infrastructure, financial resources, and social support systems. The study emphasizes the need for targeted interventions to reduce susceptibility, which include reinforcing protective structures, improving access to financial and technical resources, and promoting livelihood diversification strategies. Integrating the RESI into planning enables decision-makers to prioritize high-risk areas and allocate resources more effectively.</div></div>","PeriodicalId":100582,"journal":{"name":"Geosystems and Geoenvironment","volume":"5 1","pages":"Article 100459"},"PeriodicalIF":0.0,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}