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Title Predicting Earth-Vas2 parameters of coastal plain sand aquifers using artificial neural Network(s), in the Calabar region of Nigeria Author info Emmanuel I. Akaerue ... [et al.] Author Akaerue Emmanuel I. (35%)
Co-authors Onwuka Obialo S.
George Anthony M.
Ekwok Stephen Eguba
Alarifi Saad S.
Andráš Peter 1953- (30%) UMBFP01 - Katedra geografie a geológie
Eldosouky Ahmed M.
Source document Journal of African Earth Sciences. No. 209 (2024), pp. 1-12. - Oxford : Elsevier Ltd., 2024 Keywords hydrogeológia - hydrogeology korelačné koeficienty Headings Geogr. Nigéria Language English Country Great Britian Annotation This study employs artificial neural networks (ANNs), specifically the Nonlinear Autoregressive with External Input (NARX) model as an ANN add-on for Matlab, to forecast Earth-Vas2 parameters. The model leverages a time series approach, with the Earth-Vas2 index (y(t)) as the predictive target and various parameters (eleva tions, static water level, aquifer material thickness, transmissivity, hydraulic conductivity, specific capacity, vadose media) denoted as x(t) to facilitate accurate predictions. The Levenberg-Marquardt training algorithm was applied to the ANN using geo-hydraulic data from 56 boreholes for training and 24 boreholes for validation and testing. Validation metrics such as mean square error (MSE), correlation coefficient (R), and coefficient of determination (R2 ) were utilized. The results indicate a high degree of accuracy, with low MSE values of 0.0171 (training), 0.0087 (validation), and 0.0327 (testing). Strong correlation coefficients (R) of 0.9882, 0.9898, and 0.9844, along with high R2 values (97.66%), emphasize the robustness of the ANN model. Actual and predicted Earth-Vas2 values exhibit a similar pattern, affirming the model’s effectiveness. The R-value of 0.9882 signifies a strong positive correlation within the model, validating its ability to capture variable interactions in fluid migration control. Geo-hydraulic Earth-Vas2 maps identify areas with varying migration efficiency, guiding groundwater management. The study emphasizes routine subsurface assessments for crucial data in environ mental planning and risk reduction in industrial and municipal activities. This method provides cost-effective estimation of key geo-hydraulic properties for aquifer vulnerability assessments, with far-reaching implica tions for groundwater management, environmental protection, and land use planning. URL Link na plný text Public work category ADC No. of Archival Copy 54309 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika 
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Title Exploratory mapping of the geothermal anomalies in the neoproterozoic Arabian shield, Saudi Arabia, using magnetic data Author info Kamal Abdelrahman ... [et al.] Author Abdelrahman Kamal (20%)
Co-authors Ekwok Stephen Eguba (15%)
Ulem Christian Atelwhobel (10%)
Eldosouky Ahmed M. (5%)
Al-Otaibi Naif (5%)
Hazaea Bashar Y. (10%)
Hazaea Saddam Ali (5%)
Andráš Peter 1953- (20%) UMBFP01 - Katedra geografie a geológie
Akpan Anthony E. (10%)
Source document Minerals : international, peer-reviewed, open access journal of natural mineral systems, mineral resources, mining, and mineral processing. Vol. 13, no. 5 (2023), art. no. 694, pp. [1-15]. - Basel : Multidisciplinary Digital Publishing Institute, 2023 Keywords mapovanie - mapping anomálie geotermálna energia - geothermal energy Headings Geogr. Saudská Arábia Form. Descr. články - journal articles Language English Country Switzerland URL Link na plný text Public work category ADC No. of Archival Copy 53318 Repercussion category OUALID, Melouah - EBONG, Ebong D. Lithospheric and asthenospheric properties of the saharan platform inferred from potential field, geoid and heat flow data. In Journal of african earth sciences. ISSN 1464-343X, 2024, vol. 209, art. no. 105124, pp. 1-13.
Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika article
Title Accuracy assessment of various supervised machine learning algorithms in litho-facies classification from seismic data in the Penobscot field, Scotian Basin Author info Satya Narayan ... [et al.] Author Narayan Satya (30%)
Co-authors Konka Suresh (15%)
Chandra Akash (10%)
Abdelrahman Kamal (5%)
Andráš Peter 1953- (30%) UMBFP01 - Katedra geografie a geológie
Eldosouky Ahmed M. (10%)
Source document Frontiers in Earth Science. Vol. 11 (2023), pp. [1-14]. - Lausanne : Frontiers Media S.A., 2023 Keywords strojové učenie - machine learning validácia uhľovodíky Headings Geogr. Škótsko Form. Descr. články - journal articles Language English Country Switzerland URL Link na plný text Public work category ADC No. of Archival Copy 53323 Repercussion category KADRI, Mohamed Mehdi - GANGULI, Shib Sankar - SEN, Souvik - HACINI, Messaoud - KUMAR, Prakash. Characterization and feature ranking of well log variables using data-driven algorithms for total organic carbon estimation of organic-rich shales. In Energy and fuels. ISSN 0887-0624, 2023, vol. 37, no. 24, pp. 19575-19589.
CHANG, Jinyu - ZHANG, Nannan - ZHOU, Kefa - TAO, Jintao - CHEN, Li - ZHANG, Hao - CHI, Yujin. Apriori algorithm-based three-dimensional mineral prospectivity mapping-an example from meiling south area, Xinjiang, China. In Minerals. ISSN 2075-163X, 2023, vol. 13, no. 7, pp. 1-29.
Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika article
Title Direct detection of groundwater accumulation zones in saprock aquifers in tectono-thermal environments Author info Anthony E. Akpan ... [et al.] Author Akpan Anthony E. (20%)
Co-authors Ekwok Stephen Eguba (10%)
Ben Ubong Camilus (5%)
Ebong Ebong Dickson (5%)
Thomas Jewel Emem (5%)
Ekanem Aniekam Martin (5%)
George Nyaknno J. (5%)
Abdelrahman Kamal (5%)
Fnais Mohammed S. (5%)
Eldosouky Ahmed M. (5%)
Andráš Peter 1953- (20%) UMBFP01 - Katedra geografie a geológie
Alarifi Saad S. (10%)
Source document Water. Vol. 15, no 22 (2023), pp. 1-21. - Basel : Multidisciplinary Digital Publishing Institute, 2023 Keywords podzemné vody podzemné termálne vody saprockové vodonosné vrstvy - saprock aquifers Form. Descr. články - journal articles Language English Country Switzerland Annotation VES data acquired in tectono-thermally disturbed environments sometimes contain outliers when plotted on a bi-logarithmic graph. These noisy datasets usually distort the discernible trend of the VES curve, by plotting abnormally above or below its dominant trend at the point of their occurrence. This type of distortion is different from those arising from other causes such as galvanic and static distortions, which usually affect a segment of a curve without changing the curve’s trend. Allowing these unusual points to remain within the datasets during the data processing and modelling phases always produces unsatisfactory results because their presence usually causes the root-mean-square error to exceed the preset acceptable limit. Consequently, such data points are usually deleted to recover the trend of the curve and generate interpretable models during the traditional curve-smoothening (data processing) phase. This study has shown that these unusual data points are indicative of groundwater accumulation zones in porous medium and can also estimate likely borehole productivities in tectono-thermally disturbed environments. A single-point drop signifies a low-yielding fracture characterized by small apertures. The groundwater yield from this group of fractures can barely support the daily domestic water needs of some families. However, VES curves where two or more points break away from the trend of the curve indicate high-yielding fractures or nonconformities, provided that the resistivity value of the first break-point is lower than those of subsequent ones. The productivity level of this category of fractures is high enough to support the water needs of families. The apparent resistivities of these saturated fractures usually vary between 40 and 500 Wm, depending on the nature of the host rock. These qualitative interpretations have been confirmed by drilling and Water 2023, 15, 3946 17 of 21 pumping test results. Depths to these water-filled fractures, though location-dependent, typically vary between 40 and 100 m in the study area. These saturated fractures are common in locations with high lineament density. Optimal data-quality-management practices—including determining the sensitivity level of the equipment, repeating the measuring process, and changing the potential electrode positions and, where possible, the VES profile orientation—must be implemented to confirm the integrity and subterranean nature of the break-off points. URL Link na plný text Public work category ADC No. of Archival Copy 53990 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika article
Title Biostratigraphy of the late Campanian - Maastrichtian of the Duwi Basin, Red Sea, Egypt Author info Orabi H. Orabi ... [et al.] Author Orabi Orabi H. (25%)
Co-authors Eldosouky Ahmed M. (15%)
Abdelrahman Kamal (10%)
El Gammal Reda M. (10%)
Nallamuthu Malarkodi (10%)
Fnais Mohammed S. (5%)
Andráš Peter 1953- (25%) UMBFP04 - Katedra životného prostredia
Source document Open Geosciences. Vol. 15, no. 1 (2023), pp. 1-26. - Warsaw : De Gruyter Poland, 2023 Keywords foraminifery biostratigrafia Headings Geogr. Egypt Form. Descr. články - journal articles Language English Country Poland Annotation During the Late Campanian, sea-level fluctuation occurred in the form of two chert bands and the topmost conglomeratic phosphate beds (CF8a zone). A great transgression event occurred associated with the global warming (CF8b zone) trend indicated by large double-keeled foraminifera as Globotruncana aegyptiaca Nakkady of oligotrophic conditions. Through the event of CF6/CF5 zones, a gradual increase in the relative abundance of Gublerina rajagopalani Govindan and Planoheterohelix planata (Cushman) and other heterohelicids have been shown to tolerate and thrive in a wide range of environmental conditions as in high-stress environments. Sea-level fall at the CF6 zone and the overlying CF5 boundary marked a warming climate for the Middle Maastrichtian Event. In the latest CF4 records, the beginning of the decrease in planktic/benthic ratio, globotruncanids, rugoglobigerinids, and heterohelicids indicating a fall in sea level coincided with the CF4/CF3 and the development of dark grey shales in a regressive regime. The observed low abundance of planktic specimens may be due to the presence of pyrite with black shale interval suggesting low oxygen condition. The latest zones CF3, CF2, and CF1 are generally characterized by heterohelicids blooms specially Planoheterohelix globulosa (Ehrenberg), and a gradual decrease in diversity associated with the warming phase before the K/Pg boundary event, implying high biotic stress to even absent of Guembelitria cretacea species through CF3–CF1 zones. Pseudotextularia elegans (Rzehak) occurs in the zones CF4 and CF2 warming of phases 1 and 2 of Deccan Trap Volcanic. The absence of P. elegans (Rzehak) in the zone (CF3) is postulated due to a tectonic cause (maximum cooling of Deccan Trap Volcanic) whereas its absence in the zone (CF1) was due to regression of phase 2. URL Link na plný text Public work category ADC No. of Archival Copy 52900 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika article
Title Exploratory assessment of geothermal resources in some parts of the Middle Benue Trough of Nigeria using airborne potential field data Author info Hussain Jaber Alfaifi ... [et al.] Author Alfaifi Hussain Jaber (30%)
Co-authors Ekwok Stephen Eguba (10%)
Ulem Christian Atelwhobel (5%)
Eldosouky Ahmed M. (5%)
Qaysi Saleh (5%)
Abdelrahman Kamal (5%)
Andráš Peter 1953- (25%) UMBFP01 - Katedra geografie a geológie
Akpan Anthony E. (15%)
Source document Journal of King Saud University - Science. Vol. 35, no. 2 (2023), pp. [1-8]. - Amsterdam : Elsevier B.V., 2023 Keywords geotermálna energia - geothermal energy dáta - údaje - data spektrálna analýza Headings Geogr. Nigéria Form. Descr. články - journal articles Language English Country Netherlands URL Link na plný text Public work category ADM No. of Archival Copy 53319 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika article
Title Contribution of advanced edge-detection methods of potential field data in the tectono-structural study of the southwestern part of Cameroon Author info Alain Rodrigue Nzeuga ... [et al.] Author Nzeuga Alain Rodrigue (20%)
Co-authors Ghomsi Franck Eitel (10%)
Pham Luan Thanh (5%)
Eldosouky Ahmed M. (10%)
Aretouyap Zakari (5%)
Kana Janvier Domra (5%)
Yasmine Zambou Tsopgni (5%)
Fokem Alpha Baster Kenfack (5%)
Nouayou Robert (5%)
Abdelrahman Kamal (5%)
Fnais Mohammed S. (5%)
Andráš Peter 1953- (20%) UMBFP04 - Katedra životného prostredia
Source document Frontiers in Earth Science. Vol. 10 (2022), pp. 1-15. - Lausanne : Frontiers Media S.A., 2022 Keywords geologické štruktúry sedimenty - sediments Headings Geogr. Kamerun Form. Descr. články - journal articles Language English Country Switzerland Annotation The southwest part of Cameroon is composed of a range of geological structures and sedimentary basins, whose geological history dates from the Cretaceous, and their establishment would have originated from the opening of the South Atlantic. Among these structures, the most important is the Cameroon Volcanic Line, generally denoted CVL, followed by the southern part of the Central African Shear Zone (CASZ) called the Foumban Shear Zone (FSZ), the Ntem Complex, the Benue Trough, the northern margin of the Congo Craton, and many others. The major structures identified in this part are formed as a result of geodynamic activity between the Oligocene and the recent period, to which we can add the volcanism that exists along with the continental limit. The XGM201e_2159 model is used to highlight the geological structures of Southwestern Cameroon. First, we separated the regional and residual anomalies from Bouguer gravity data. Then, we used a combination of filters to enhance the signature of the residual anomalies in Southwest Cameroon. These filters identified various geological structures in the area. Finally, we applied the enhanced horizontal gradient amplitude (EHGA) and multi-scale horizontal derivative of the vertical derivative (MSHDVD) methods to reveal the geological contacts, allowing us to establish the corresponding structural map of the region. In addition, the results obtained in this study are the first to precisely define the circumferential demarcation of the continental and oceanic expansions of Mount Cameroon, while clearly illustrating the Bao, Bomana, Tiko, and Ekona faults that extend to the Bakassi Peninsula and the Douala outlet. Furthermore, they highlight the strike–slip faults in the summit vicinity. The structural map shows that most of the geological boundaries identified in the area are trending in the NE–SW, NNE–SSW, ENE–WSW, N–S, and NW–SE directions. URL Link na plný text Public work category ADC No. of Archival Copy 52195 Repercussion category SAFANI, Jamhir - IBRAHIM, Khalil - DENI, Wa - RUBAIYN, Al - FIRDAUS, F. - HARISMA, H. Interpreting structural configuration of the Sengkang Basin of Indonesia using edge detection and 3-D Euler deconvolution to satellite gravity data. In Turkish journal of earth sciences. ISSN 1300-0985, 2023, vol. 32, no. 7, pp. 894-914.
Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika article
Title Towards understanding the extent of saltwater incursion into the coastal aquifers of Akwa Ibom State, Southern Nigeria using 2D ERT Author info Stephen E. Ekwok ... [et al.] Author Ekwok Stephen Eguba (30%)
Co-authors Ben Ubong Camilus (10%)
Eldosouky Ahmed M. (10%)
Qaysi Saleh (5%)
Abdelrahman Kamal (10%)
Akpan Anthony E. (10%)
Andráš Peter 1953- (25%) UMBFP04 - Katedra životného prostredia
Source document Journal of King Saud University - Science. Vol. 34, no. 8 (2022), pp. [1-8]. - Amsterdam : Elsevier B.V., 2022 Keywords slané vody pobrežia Headings Geogr. Nigéria Form. Descr. články - journal articles Language English Country Great Britian Annotation The hydro-lithostratigraphic units of the coastal area of Akwa Ibom State, Southern Nigeria were investigated involving electrical resistivity tomography (ERT) and Wenner array. This procedure and electrode configuration were adopted because of their wide range of sensitivity and inherent characteristics to geological materials. This study is aimed at defining the extent of saltwater invasions into the coastal and inland aquifers. The investigated area is divided into three zones A ( 0 < 20 km), B (<20 < 40 km), and C (>40 km)) based on the distance from the survey locations to the shoreline. The saline aquifer of the control tomogram obtained at the shoreline (Ibeno Beach) is characterized by the electrical resistivity of 0.159–3.55 Om. Within Zone A, (Ukpenekang, Eastern Obolo, and Okoro Ette), the saline aquifer is defined by electrical resistivity values of 0.33–44.0 Om, 2.07–48.5 Om, and 8.0–60.0 Om respectively. In general, the Zone B saline aquifers are defined by electrical resistivity values of 0.602–64.5 Om. Furthermore, the third zone which is situated a distance >40 km from the shoreline, is described by relatively higher electrical resistivity values (38.9–3260 Om) and indicates a region free from saltwater incursions. Generally, the 2D ERT models showed that electrically resistivity values increase progressively inland. URL Link na plný text Public work category ADM No. of Archival Copy 52293 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika article
Title Determination of structural lineaments on Northeastern Laos using the LTHG and EHGA methods Author info Luan Thanh Pham ... [et a.] Author Pham Luan Thanh (20%)
Co-authors Oliveira Saulo P. (10%)
Eldosouky Ahmed M. (10%)
Abdelrahman Kamal (10%)
Fnais Mohammed S. (10%)
Xayavong Viengthong (10%)
Andráš Peter 1953- (20%) UMBFP04 - Katedra životného prostredia
Van Le Dung (10%)
Source document Journal of King Saud University - Science. Vol. 34, no. 3 (2022), pp. 1-7. - Amsterdam : Elsevier B.V., 2022 Keywords gravitácia - gravity - gravitation horniny - rocks Headings Geogr. Laos Form. Descr. články - journal articles Language English Country Netherlands Annotation The LTHG and EHGA methods are enhancement versions of the gradient amplitude and can outline the edges of shallow and deep anomalous bodies simultaneously. Recently, these techniques have been used in approximating the edges of gravity and magnetic data. In this paper, we apply the LTHG and EHGA methods to the gravity dataset from the global gravity model WGM2012 to extract structural features of Northeastern Laos that appear as lineaments on transformed data maps. We also apply the tilt depth method to this dataset to estimate the depth of these lineaments. The findings showed that most of structures identified in Northeastern Laos are trending in the ENE-WSW, NE-SW, E-W, WNW-ESE and N-S directions with the depth ranging from 1.3 to 2.1 km. URL Link na plný text Public work category ADM No. of Archival Copy 51544 Repercussion category OGUNGBEMI, Oluwaseun Samuel - OYEBODE, Kazeem - BADMUS, Ganiyu Olabode - OGUNYEMI, Adebayo Tajudeen. Modeling of structural features from aeromagnetic maps using an improved deep learning technique. In Earth science informatics. ISSN 1865-0473, 2022, vol. 15, no. 4, pp. 2665-2671.
XU, Menglong - YANG, Yabin - SUN, Chengye - QIU, Gengen - CHEN, Liang - JING, Lei. Geophysical characterisation and oil-gas resource analysis of the Southern Huaying Mountain fault zone, Sichuan Basin, China. In Minerals. ISSN 2075-163X, 2023, vol. 13, no. 2, pp. 1-21.
PRASAD, Korimilli Naga Durga - PHAM, Luan Thanh - SINGH, Anand P. - ELDOSOUKY, Ahmed M. - ABDELRAHMAN, Kamal - FNAIS, Mohammed S. - GOMEZ-ORTIZ, David. A novel enhanced total gradient (ETG) for interpretation of magnetic data. In Minerals. ISSN 2075-163X, 2022. vol. 12, no. 11, pp. 1-16.
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Title An alternative approach to estimate river cross-sections using LIDAR-based digital elevation model Author info Mohd Talha Anees ... [et al.] Author Anees Mohd Talha (15%)
Co-authors Bakar Ahmad Farid Bin Abu (10%)
Khan Mohammad Muqtada Ali (10%)
Syakir Muhammad I. (5%)
Abdullah K. (5%)
Nordin Mohd Nawawi Mohd (5%)
Abdelrahman Kamal (5%)
Eldosouky Ahmed M. (10%)
Andráš Peter 1953- (15%) UMBFP04 - Katedra životného prostredia
Yahaya Nasehir Khan Bin E.M. (5%)
Johar Zubaidi (5%)
Omar Fatehah Mohd (5%)
Kadir Mohd Omar Abdul (5%)
Source document Hydrological sciences journal. Roč. 67, č. 6 (2022), s. 996-1010. - London : Taylor & Francis Group, 2022 Keywords rieky - rivers životné prostredie - environment environmentalistika - environmental science Form. Descr. články - journal articles Language English Country Great Britian Annotation Topographic LIDAR can be used to estimate elevation values for dry areas down to the river water level during the extraction of river cross-sections (XS). However, LIDAR cannot accurately predict the submerged topography, which causes uncertainty in river XS area estimation. This uncertainty affects the channel water level and flood inundation depth estimation in in situ sparse data. Therefore, an alternative approach is presented to estimate unknown submerged topography (UST) using topographic LIDAR. The one dimension/two dimension Hydrologic Engineering Center River Analysis System (1D/2D HEC-RAS) model is used to simulate the estimated river XS with the help of in situ river water level and flow data which is later validated using in situ data. The results show that the proposed approach accurately estimates water level (error >0.5 m), channel flow areas, and floodplain water depths. Notably, the extent of the estimated floodplain overflow by UST models was in 94% agreement with the real XS. URL Link na plný text Public work category ADC No. of Archival Copy 52095 Repercussion category BISWAL, Sabinaya - SAHOO, Bhabagrahi - JHA, Madan K. - BHUYAN, Mahendra K. A hybrid machine learning-based multi-DEM ensemble model of river cross-section extraction : implications on streamflow routing. In Journal of hydrology. ISSN 0022-1694, 2023, vol. 625, art. no. 129951, pp. 1-24.
BISWAL, Sabinaya - SAHOO, Bhabagrahi - JHA, Madan K. - BHUYAN, Mahendra K. A copula model of extracting DEM-based cross-sections for estimating ecological flow regimes in data-limited deltaic-branched river systems. In Journal of environmental management. ISSN 0301-4797, 2023, vol. 342, art. no. 118095, pp. 1-24.
ESSEL-YORKE, K. A. - ANIM, M. - NYARKO, B. K. Sedimentation assessment using hydrological simulation and bathymetry survey : the case of river Amissa drainage basin, Ghana. In Heliyon. ISSN 2405-8440, 2023, vol. 9, no. 3, pp. 1-13.
Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika article