Geosystems and Geoenvironment最新文献

{"title":"Fractal characteristics of earthquake occurrence in Al Hoceima city and its adjoining region, Morocco","authors":"Abderrahim Boulanouar ,&nbsp;Ram Krishna Tiwari ,&nbsp;Zian Ahmed ,&nbsp;Harihar Paudyal ,&nbsp;Abdelaali Rahmouni","doi":"10.1016/j.geogeo.2025.100402","DOIUrl":"10.1016/j.geogeo.2025.100402","url":null,"abstract":"<div><div>Al Hoceima region is one of the most seismically vulnerable areas in northern Morocco due to its proximity to the Africa–Eurasia plate convergence. This study presents an examination of geographic and temporal variations of the correlation fractal dimension (Dc value) and the seismic b-value in the Al Hoceima city and adjoining region, Morocco. The data file is prepared from the International Seismological Center (ISC) catalog spanning from September 1965 to April 2023, which includes 1301 earthquakes having magnitude of completeness Mc = 3.6. The maximum likelihood technique is used to estimate the b-value of the Gutenberg-Richter law, and the correlation integral technique to estimate the Dc value. Among the three approaches used for estimation, the first involves a temporal window that shifts in five-year increments. The second employs spatial sliding windows while keeping the latitude constant, and the third utilizes a spatial sliding window with a fixed longitude. The average value of the parameters b was estimated to be (1.1 ± 0.1) from the first approach, (1.45 ± 0.1) from the second approach and (1.52 ± 0.15) from the third approach. The average values of the spatial fractal dimension estimated from the three techniques are respectively (0.68 ± 0.04), (0.62 ± 0.04) and (0.37 ± 0.11). According to our results, the Dc/b ratio is smaller than 0.54 for Approach 1, smaller than 0.6 for Approach 2, and greater than 0.33 for Approach 3. This study found a strong positive correlation in the temporal approach while weak positive and negative correlations between the Dc value and the b-value for both the spatial approaches. The outcome of this study offers new understanding of the fractal characteristics of earthquake distribution in the Al Hoceima region of Morocco.</div></div>","PeriodicalId":100582,"journal":{"name":"Geosystems and Geoenvironment","volume":"4 3","pages":"Article 100402"},"PeriodicalIF":0.0,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143935946","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":"Geophysical assessment of aquifer protectivity, groundwater potential and flow dynamics in Northern Akwa Ibom state, Nigeria: Implications for sustainable freshwater management","authors":"Emem O. Ikpe ,&nbsp;Aniekan M. Ekanem ,&nbsp;Nyakno J. George ,&nbsp;Jewel E. Thomas","doi":"10.1016/j.geogeo.2025.100401","DOIUrl":"10.1016/j.geogeo.2025.100401","url":null,"abstract":"<div><div>Sustainable fresh water supply constitutes one of the challenges in recent times. We present the results of the geophysical valuation of aquifer protectivity, groundwater potentiality and flow properties in the northern part of Akwa Ibom state, Nigeria. Vertical electrical sounding (VES) and electrical resistivity tomography (ERT) were conducted at 55 and 20 locations respectively in the study area to generate 1D and 2D resistivity sections of the subsurface. A maximum of four layers have been delineated from the results of the electrical resistivity soundings. These layers are successions of poorly–sorted sands and gravels with minor clay intercalation at some locations. The aquifers lie between 1.0 to 47.8 m deep and are 18.6 to 102.7 m thick. The aquifer protective capacity (APC) grading is adjudged to be poor (96 %) to weak (4 %) respectively as the overlying layers are mostly porous and permeable. However, the aquifers have great groundwater potential with 6 % moderate grading, 9 % high grading and 85 % very high grading. The discrete rock typing (DRT) results delineate the aquifers into two hydraulic flow units (HFU) of sandy clay and fine/coarse/gravelly sands. The stratigraphic modified Lorenz Plot (SMLP) technique however delineates the aquifers into five HFUs, classified as conductors (96 %) and super conductors (4 %) with ranking efficiencies of fair and good respectively. The DRT and SMLP classifications seem to show consistency, which indicate the fidelity of our investigation approach. The aquifer units are shown to be highly heterogeneous, corroborated by the electrical resistivity sounding results and the variability in the HFUs inferred from the SMLP results. The established regression equations in this research could be utilized for the predictions of aquifer hydraulic and flow properties from surficial electrical sounding data in locations with comparable geology. These results are highly propitious in the development of efficient strategies to preserve groundwater resources in the area by policymakers and water resource managers.</div></div>","PeriodicalId":100582,"journal":{"name":"Geosystems and Geoenvironment","volume":"4 3","pages":"Article 100401"},"PeriodicalIF":0.0,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143932091","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":"Petrogenesis and tectonic implications of Early Cretaceous I-type granites from offshore drilling in east of the Fuzhou City, Southeast China","authors":"Han Yan ,&nbsp;Xi-Yao Li ,&nbsp;Xun Yuan ,&nbsp;Sanzhong Li ,&nbsp;Xin Chen ,&nbsp;Pengcheng Wang ,&nbsp;Yu Wang ,&nbsp;Jie Gao","doi":"10.1016/j.geogeo.2025.100400","DOIUrl":"10.1016/j.geogeo.2025.100400","url":null,"abstract":"<div><div>The Cretaceous (&lt;115 Ma) granitoid rocks in Southeast China provide critical insights into the role of juvenile materials in their genesis, as evidenced by the presence of I- and A-type granites. This study presents comprehensive geochronological, mineralogical, geochemical, and Sr–Nd–Hf isotopic data for granites collected from the offshore drilling in the western East China Sea, located east of the Fuzhou City (Fujian Province), Southeast China. Zircon, apatite, and titanite U–Pb dating reveal that the granite samples formed at 112–111 Ma. The samples exhibit geochemical characteristics typical of I-type granites, with negative whole-rock ε_Nd(t) values (–4.4) and zircon ε_Hf(t) values ranging from –2.8 to 0.1. These I-type granites were primarily formed through partial melting of mafic igneous protoliths, followed by magma mixing with ancient crustal materials. We propose that the SE China coast underwent a transition from a compressional to a lithospheric extensional environment during the late Early Cretaceous, driven by the slab rollback of the subducted Paleo-Pacific Plate. This lithospheric extension facilitated the underplating of mantle-derived magma, which modified the crustal source and induced melting of continental arc crustal materials.</div></div>","PeriodicalId":100582,"journal":{"name":"Geosystems and Geoenvironment","volume":"4 3","pages":"Article 100400"},"PeriodicalIF":0.0,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143935947","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":"Heavy metal contamination and risk assessments in the surface water of Tanguar Haor, Bangladesh","authors":"Md Fardullah ,&nbsp;Mohammad Saimon Islam ,&nbsp;M A A Shofi Uddin Sarkar ,&nbsp;Md. Rakibur Rahman ,&nbsp;Khadigha Akther ,&nbsp;Md. Tanvir Hossain ,&nbsp;Fataha Nur Robel","doi":"10.1016/j.geogeo.2025.100399","DOIUrl":"10.1016/j.geogeo.2025.100399","url":null,"abstract":"<div><div>Heavy metal pollution, distribution, and health concerns in Tanguar Haor's surface water were evaluated in this study. Overall, the concentration of heavy metals was as follows: Ni &gt; Cr &gt; Pb &gt; Zn &gt; Cu &gt; Mn. Cu significantly contaminated most water samples, according to the enrichment factor (<em>EF</em>), contamination factor (<em>CF</em>), pollution load index (<em>PLI</em>), and potential ecological risk (<em>PER</em>). As Cr influenced the heavy metal evaluation index (<em>HEI</em>) and heavy metal pollution index (<em>HPI</em>), Tanguar Haor water is severely contaminated. The hazard index (<em>HI</em>) and particular hazard quotients (<em>HQ</em>s) for adults and children demonstrated no non-carcinogenic heavy metal risk from cutaneous exposure. In addition, every station discovered that the values of Cr and Pb were much beyond the permitted limit given by the Bureau of Indian Standards (BIS), the Environment Conservation Rules (ECR), and the World Health Organization (WHO). Both adults and children have significant Cr's carcinogenic risk. However, adults are more vulnerable to both carcinogenic and non-carcinogenic risks. Thus, S12, near Barek Tila station, is severely toxic and dangerous. Pearson correlation showed a substantial positive correlation between Cu-Mn, Ni-Cu, Cu-Pb, and Cr-Ni, suggesting the same origins, whereas Zn and Mn were uncorrelated, showing separate origins. Primary metal contamination in Tanguar Haor, Bangladesh, comes from agricultural, household, and industrial wastes directly dumped into the waterways. Excessive metal contamination may affect local water quality, fish, food, livelihoods, and public health. Regional water quality must be monitored for metal levels to protect human and environmental health.</div></div>","PeriodicalId":100582,"journal":{"name":"Geosystems and Geoenvironment","volume":"4 3","pages":"Article 100399"},"PeriodicalIF":0.0,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143903996","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":"Lineament extraction and structural mapping using Landsat-9 OLI and Sentinel-1 SAR data in the Proterozoic North Singhbhum Mobile Belt, Eastern India","authors":"Nandini Choudhury ,&nbsp;Atin Kumar Mitra ,&nbsp;Biswajit Nath ,&nbsp;Mark D Lindsay","doi":"10.1016/j.geogeo.2025.100392","DOIUrl":"10.1016/j.geogeo.2025.100392","url":null,"abstract":"<div><div>The present study explores the application of Landsat-9 OLI and Sentinel-1 SAR data for effective lineament extraction and structural mapping in the Proterozoic North Singhbhum Mobile Belt, Eastern India, an area characterized by complex geological and significant tectonic history. The study employs a combination of manual and automated lineament extraction techniques, with principal component analysis (PCA) applied to Landsat 9 OLI imagery to enhance the visibility of underlying geological structures. The analysis revealed that PC1 captured the highest accuracy for lineament extraction. Sentinel-1 SAR data, acquired in Interferometric Wide (IW) swath mode with dual polarization (VV and VH), was processed using Google Earth Engine, allowing for detailed analysis of surface features. The VH polarization was particularly effective in detecting fine-scale linear features due to its sensitivity to surface roughness and vegetation penetration. Field data collection was integral to the research, allowing for the validation of remote sensing results and the construction of a detailed regional structural map. Stereographic projections were utilized to analyse and visualize structural orientations, including schistosity, lineations, shear foliations and fold axes, providing insights into the area's tectonic evolution. The comparative analysis of lineament characteristics from Landsat-9 OLI and Sentinel-1 SAR datasets indicated that while Sentinel-1 detected a greater number of shorter lineaments, Landsat-9 provided longer lineaments with distinct orientations. This study underscores the efficacy of integrating remote sensing data with field observations and advanced analytical tools, contributing to a deeper understanding of the geological framework.</div></div>","PeriodicalId":100582,"journal":{"name":"Geosystems and Geoenvironment","volume":"4 3","pages":"Article 100392"},"PeriodicalIF":0.0,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143870023","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":"Initial development of marine meteorology in China: Insights from two pioneers Prof. Pingjan Tsiang and Prof. Binhua Wang","authors":"Gang Fu ,&nbsp;Yihong Duan","doi":"10.1016/j.geogeo.2025.100393","DOIUrl":"10.1016/j.geogeo.2025.100393","url":null,"abstract":"<div><div>Meteorology is a science which has long time history and significant impacts on the lives of people globally, attracting worldwide attention. Qingdao Observatory, known as one of “three major observatories in the far east” built by Germany in 1898, had remarkable influences on the evolution of marine meteorology in China. Chinese Meteorological Society (CMS) was established on 10 October 1924 in Qingdao Observatory, which is widely regarded as the birthplace of modern meteorology in China. During the childhood of modern meteorology in China, quite some pioneers had made significant contributions. Based on widely-published Chinese and English books and papers, this article tells unusual stories behind two pioneers, Dr. Pingjan Tsiang (蒋丙然) and his student Binhua Wang (王彬华), who both served as the directors of Qingdao Observatory successively, and played vital roles in promoting the development of marine meteorology in China. However, due to the complex reasons like the influence of wars and the limitation of papers being published in non-English journals, their names and academic contributions were rarely recognized by the international academic community, beyond their home country – China. This paper may provide multiple-angle insights for understanding of the history of marine meteorology in China.</div></div>","PeriodicalId":100582,"journal":{"name":"Geosystems and Geoenvironment","volume":"4 3","pages":"Article 100393"},"PeriodicalIF":0.0,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143854681","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":"Biostratigraphy, stratigraphy and paleoenvironments of middle Eocene – middle Oligocene sediments from Onshore Niger Delta, Nigeria: Insights from foraminifera and palynomorphs","authors":"Moshood Adegboyega Olayiwola ,&nbsp;Olugbenga Temitope Fajemila","doi":"10.1016/j.geogeo.2025.100391","DOIUrl":"10.1016/j.geogeo.2025.100391","url":null,"abstract":"<div><div>In recent times, biostratigraphy, apart from its primary roles in age dating, paleoenvironmental reconstruction and correlation now constitutes a significant aspect of sequence stratigraphy applicable in exploration and production activities. Unfortunately, published biostratigraphic and biochronostratigraphic records of Niger Delta Eocene –Oligocene sediments are scanty. This integrated study of the H1-P well (1250–3931 m) from the Central Niger Delta revealed two lithostratigraphic units, the continental Benin Formation (1250–2384 m) and the Upper Agbada Formation (2384–3931 m) composed of alternating sand and shale intervals. The uppermost section (1250–2384 m), which is within the continental Benin Formation was barren of foraminifera. However, it was dated Early to Middle Oligocene (P520-P560) based on diagnostic palynomorphs. Conversely, the lowermost part (3931–2384 m), consisting moderate numbers of foraminifera species, was dated Late Eocene (P480). The paleoenvironments, which fluctuated between Coastal Deltaic to Middle Neritic, were subdivided into four highstand and four transgressive systems tracts. The 39.4 Ma, 38.0Ma, 36.8 Ma and 35.9 Ma maximum flooding surfaces, and three sequence boundaries were inferred. The youngest maximum flooding surface dated 35.9 Ma at 2385 m, was defined by the FDO <em>Nonion oyae</em>, FDO <em>Brizalina ihuoensis</em> (2402 m), presence of <em>Globigerina yeguaensis</em> and FDO <em>Uvigerinella sparsicostata</em> at 2713 m, the FDO of the diagnostic palynomorphs <em>Grimsdalea polygonalis, Doualaidites laevigatus,</em> at 2414 m / 2792 m respectively indicated the penetration of Late Eocene. The FDO <em>Uvigerina hourqi</em> delineated the Middle/Late Eocene boundary at 3121 m. The Middle Eocene is further characterized by Acme <em>Uvigerinella sparsicostata</em> and occurrence of <em>Chiloguembelina martini</em>. The sequence stratigraphic interpretation permitted age dating of the maximum flooding surfaces and the sequence boundaries within the well section.</div></div>","PeriodicalId":100582,"journal":{"name":"Geosystems and Geoenvironment","volume":"4 3","pages":"Article 100391"},"PeriodicalIF":0.0,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143843885","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":"Prioritization of the Tassaoute Watershed (Morocco) for soil erosion using analytical hierarchy process (AHP) and geospatial techniques","authors":"Khalid Ziadi ,&nbsp;Ahmed Barakat ,&nbsp;Abdenbi El Aloui ,&nbsp;Mustapha Ouayah ,&nbsp;Mustapha Namous","doi":"10.1016/j.geogeo.2025.100389","DOIUrl":"10.1016/j.geogeo.2025.100389","url":null,"abstract":"<div><div>Identifying areas vulnerable to soil erosion is essential for the sustainable management of natural resources and the implementation of effective prevention strategies. This study proposes a robust multi-criteria decision analysis (MCDA)framework integrated with geographic information system (GIS) technology to evaluate susceptibility to water erosion in the upstream watershed of Tassaoute (Central High Atlas, Morocco). Elevation, slope, SPI, TWI, NDVI, LULC, lithology, rainfall, distance from river, and drainage density were the ten factors we employed to establish the soil erosion vulnerability map. Criteria weights were measured using the AHP method based on suggestions from different studies and research that ensured an effective way of soil erosion control. The final susceptibility map, created from GIS data and a classification of natural phenomena, identified five distinct levels: very low, low, moderate, high and very high. It reveals a significant erosion threat, with around 60 % of the study area showing moderate to very high levels of erosion. On the other hand, 40 % of the area studied is considered to be at low risk of erosion. Areas at high risk of erosion are more common on steep slopes, with high rainfall and rocks of the marl and clay formation. The accuracy of the results is assessed using the ROC (receiver operating characteristic) curve. The area under the curve (AUC) is 0.782, equivalent to a prediction accuracy of 78.2 %. In conclusion, this model is proving to be a valuable tool for effectively guiding future planning with regard to sustainable soil and water management, in particular by addressing the problem of soil erosion.</div></div>","PeriodicalId":100582,"journal":{"name":"Geosystems and Geoenvironment","volume":"4 2","pages":"Article 100389"},"PeriodicalIF":0.0,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143825344","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":"Holocene climate variability deciphered from Chilika Lagoon sediments: Implication for anthropogenic activity or paleocyclones?","authors":"Barnita Banerjee ,&nbsp;Monalisa Mallick ,&nbsp;Mohd Amir ,&nbsp;Abdul Hameed ,&nbsp;Luan Ozelim ,&nbsp;Nihar Ranjan Kar ,&nbsp;E.V.S.S.K. Babu ,&nbsp;K. Venkatesham ,&nbsp;M. Venkateshwarlu ,&nbsp;Tanveer Hassan ,&nbsp;Vireswar Samanta ,&nbsp;Prem Chand Kisku ,&nbsp;Debajyoti Paul ,&nbsp;Pankaj Kumar ,&nbsp;Aurovinda Panda","doi":"10.1016/j.geogeo.2025.100390","DOIUrl":"10.1016/j.geogeo.2025.100390","url":null,"abstract":"<div><div>Coastal lagoons, acting as a link between land and sea, serve as valuable archives for past climate variations, human activities, and paleo-cyclonic events. In this study, we employ a multi-proxy approach to analyze sedimentary records and uncover climatic shifts influenced by both monsoonal and non-monsoonal factors. Our analysis incorporates sediment characteristics such as grain size, magnetic susceptibility (MS), and clay mineralogy to infer high-energy conditions within the Chilika Lagoon. Additionally, we utilize Rock-Eval pyrolysis and deconvolution of flame ionization detector (FID) signals to determine the type of organic matter (OM) present.</div><div>Findings reveal that during the Early Holocene, a high sand percentage and elevated MS indicate an intensified monsoon, coinciding with a dominance of terrestrial OM. However, as monsoonal intensity declined after the Early Holocene, marine OM became more prevalent, likely linked to the formation of an estuary around ∼7.7 Ka. Despite a weakening monsoon around ∼4 Ka, MS values remained high, possibly due to increased aeolian input, which transported titanomagnetite, contributing to elevated MS in the sediment record. After ∼4 Ka, the sedimentary record indicates a greater influx of terrestrial OM, likely due to the formation of a barrier spit that limited marine influence. From this period onward, monsoonal intensity gradually increased, peaking around ∼1.1 Ka, coinciding with the Medieval Warm Period. Following ∼1.1 Ka, sedimentation rates rose, accompanied by low magnetic susceptibility (MS) and high sand content. This phase also shows an increase in both terrestrial and marine OM, along with higher CaCO₃ and illite concentrations, suggesting the impact of high-energy events, possibly cyclones. The intensification of cyclonic activity after ∼1.1 Ka may be associated with a weakening of El Niño–Southern Oscillation (ENSO) intensity during this period.</div></div>","PeriodicalId":100582,"journal":{"name":"Geosystems and Geoenvironment","volume":"4 3","pages":"Article 100390"},"PeriodicalIF":0.0,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143852121","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":"WebGIS-based decision support system for soil erosion risk assessment for Guder River catchment, Ethiopia","authors":"Kedir Kemal Hajisheko ,&nbsp;Karuturi Venkata Suryabhagavan ,&nbsp;Karuturi Soumya","doi":"10.1016/j.geogeo.2025.100387","DOIUrl":"10.1016/j.geogeo.2025.100387","url":null,"abstract":"<div><div>Soil erosion is a crucial environmental issue affecting agricultural productivity, water quality, and ecosystem sustainability. Deforestation and human activities have led to excessive soil erosion. A webGIS-based decision support system (DSS) was developed to provide complete information on soil erosion in the Guder watershed forming a part of the Abay River Basin in Ethiopia. The parameters employed were estimated using remote sensing data. Sub-watersheds were prioritised based on soil erosion risk through a revised universal soil loss equation (RUSLE) integrated with geographic information system (GIS). The study employed high-resolution spatial data, including rainfall, soil properties, and topography, to model erosion rates across the watershed. Results indicate that the annual soil loss in the watershed varied significantly from 0 to 8021 t ha⁻¹ yr⁻¹, with an average loss of 97.5 t ha⁻¹ yr⁻¹. About 33.3% of the watershed experienced very high soil loss (&gt;50 t ha⁻¹ yr⁻¹), accounting for 91.3% of the total eroded. In contrast, 25.5% of the area exhibited medium soil erosion rates (&lt;5 t ha⁻¹ yr⁻¹). The WebGIS tool developed is powerful and user-friendly portal that enables non-technical users to access real-time soil erosion data and better understand soil conservation programs, helping them identify measures to reduce soil erosion in the watershed. Moreover, this information also supports land managers, policymakers, and farmers in adopting targeted soil erosion control measures, promoting sustainable land management in the region.</div></div>","PeriodicalId":100582,"journal":{"name":"Geosystems and Geoenvironment","volume":"4 2","pages":"Article 100387"},"PeriodicalIF":0.0,"publicationDate":"2025-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143783527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}