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1.

001-es BibID:BIBFORM103812
035-os BibID:(cikkazonosító)e2021WR031821 (WoS)000863634200001 (Scopus)85141708017
Első szerző:Bahmanpouri, Farhad
Cím:Estimating the average river cross section velocity by observing only one surface velocity value and calibrating the entropic parameter / Farhad Bahmanpouri, Anette Eltner, Silvia Barbetta, László Bertalan, Tommaso Moramarco
Dátum:2022
ISSN:0043-1397
Megjegyzések:The current research aims to predict the velocity distribution and discharge rates in rivers based on the entropy concept using only one surface velocity measurement. In this direction, first, UAV-based image acquisition technique was applied to collect the surface velocity distribution along two European rivers, the Sajó and the Freiberger Mulde Rivers. Seven cross-sections were chosen for the analysis. At each cross-section, first, the entropic parameter phí(M) was calibrated based on the maximum and mean velocity magnitudes, derived from Acoustic Doppler Current Profilers (ADCP), respectively, showing a trend for all cross-sections with a range of 0.6 < phí(M) < 0.75. Next, the maximum surface velocity provided by the UAV was implemented as a single velocity input. Finally, the bathymetry data, herein collected by UAV, were considered as the input for the entropy approach. In this way, the entropy iterative method allowed estimating the mean flow velocity by identifying the location (dip) of maximum velocities across the river site and inferring the 2D velocity distribution. The results highlighted that the entropy approach can accurately predict the velocity distribution and discharge rates with a percentage error lower than 13%.
Tárgyszavak:Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
UAV
entropy method
velocity estimation
discharge estimation
river monitoring
Megjelenés:Water Resources Research. - 58 : 10 (2022), p. 1-15. -
További szerzők:Eltner, Anette Barbetta, Silvia Bertalan László (1989-) (geográfus) Moramarco, Tommaso
Pályázati támogatás:DAAD-TKA : 307670
Egyéb
TKP2020-NKA-04
Egyéb
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2.

001-es BibID:BIBFORM075898
035-os BibID:(cikkazonosító)1613 (Wos)000451736300120 (Scopus)85056238502
Első szerző:Bertalan László (geográfus)
Cím:Issues of Meander Development: Land Degradation or Ecological Value? The Example of the Sajó River, Hungary / Bertalan László, Novák Tibor József, Németh Zoltán, Rodrigo-Comino Jesús, Kertész Ádám, Szabó Szilárd
Dátum:2018
ISSN:2073-4441
Megjegyzések:The extensive destruction of arable lands by the process of lateral bank erosion is a major issue for the alluvial meandering type of rivers all around the world. Nowadays, land managers, stakeholders, and scientists are discussing how this process affects the surrounding landscapes. Usually, due to a land mismanagement of agroforestry activities or urbanization plans, river regulations are designed to reduce anthropogenic impacts such as bank erosion, but many of these regulations resulted in a degradation of habitat diversity. Regardless, there is a lack of information about the possible positive effects of meandering from the ecological point of view. Therefore, the main aim of this study was to investigate a 2.12 km long meandering sub-reach of Sajó River, Hungary, in order to evaluate whether the process of meander development can be evaluated as a land degradation processes or whether it can enhance ecological conservation and sustainability. To achieve this goal, an archive of aerial imagery and UAV (Unmanned Aerial Vehicle)-surveys was used to provide a consistent database for a landscape metrics-based analysis to reveal changes in landscape ecological dynamics. Moreover, an ornithological survey was also carried out to assess the composition and diversity of the avifauna. The forest cover was developed in a remarkable pattern, finding a linear relationship between its rate and channel sinuosity. An increase in forest areas did not enhance the rate of landscape diversity since only its distribution became more compact. Eroding riverbanks provided important nesting sites for colonies of protected and regionally declining migratory bird species such as the sand martin. We revealed that almost 70 years were enough to gain a new habitat system along the river as the linear channel formed to a meandering and more natural state.
Tárgyszavak:Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
bank erosion
landscape metrics
diversity
uav
Sajó
Megjelenés:Water. - 10 : 11 (2018), p. 1-21. -
További szerzők:Novák Tibor (1973-) (geográfus) Németh Zoltán (1976-) (biológus) Rodrigo-Comino, Jesús Kertész Ádám (1948-) Szabó Szilárd (1974-) (geográfus)
Pályázati támogatás:EFOP-3.6.1-16-2016-00022
EFOP
NKFIH 108755
Egyéb
ÚNKP-17-3
Egyéb
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3.

001-es BibID:BIBFORM106749
035-os BibID:(cikkazonosító)358 (Scopus)85146798477
Első szerző:Chakilu, Gashaw Gismu
Cím:The Dynamics of Hydrological Extremes under the Highest Emission Climate Change Scenario in the Headwater Catchments of the Upper Blue Nile Basin, Ethiopia / Gashaw Gismu Chakilu, Szegedi Sándor, Túri Zoltán
Dátum:2023
ISSN:2073-4441
Megjegyzések:Climate change and its impact on surface runoff in the upper Blue Nile basin and sub-basins have been widely studied in future climate projections. However, the impact on extreme flow events of rivers is barely investigated discretely. In this paper, the change in temperature and rainfall under the Representative Concentration Pathway (RCP) highest emission scenario (RCP 8.5) and its impact on the high flow and low flow simulated by the Soil and Water Assessment Tool (SWAT 2012) in major watersheds of the Lake Tana Basin has been evaluated by comparing the baseline period (1971-2000) with the 2020s (2011-2040), 2050s (2041-2070), and 2080s (2071-2100). The high flows of watersheds were selected by the Annual Maximum Series (AMS) model, whereas the low-flow watersheds were selected by the 7-day sustained mean annual minimum flow method. The result showed that the highest change in maximum temperature ranged from 2.93 ?C to 5.17 ?C in monthly time scales in the 2080s. The increment in minimum temperature is also more prominent in the 2080s and it is expected to rise by 4.75 ?C. Inter-annual variability of the change in rainfall has shown increasing and decreasing patterns. The highest increments are expected by 22.37%, 25.58%, and 29.75% in the 2020s, 2050s, and 2080s, respectively, whereas the projected highest decrease in rainfall dictates the decrease of 6.42%, 7.11%, and 9.26% in 2020s, 2050s, and 2080s, respectively. Due to changes in temperature and rainfall, the low flow is likely to decrease by 8.39%, 8.33%, 6.21%, and 5.02% in Ribb, Gumara, Megech, and Gilgel Abay watersheds, respectively, whereas the high flow of Gilgel Abay, Megech, Gumara, and Ribb watersheds are expected to increase by 13.94%, 12.16%, 10.90%, and 10.24%, respectively, every 30 years.
Tárgyszavak:Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
climate change
high flow
low flow
SWAT
upper Blue Nile basin
Megjelenés:Water. - 15 : 2 (2023), p. 1-20. -
További szerzők:Szegedi Sándor (1970-) (klimatológus) Túri Zoltán (1980-) (geográfus)
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4.

001-es BibID:BIBFORM088959
Első szerző:Chakilu, Gashaw Gismu
Cím:Change in Stream Flow of Gumara Watershed, upper Blue Nile Basin, Ethiopia under Representative Concentration Pathway Climate Change Scenarios / Gashaw Gismu Chakilu, Szegedi Sándor, Túri Zoltán
Dátum:2020
ISSN:2073-4441
Tárgyszavak:Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Water. - 12 : 11 (2020), p. 1-14. -
További szerzők:Szegedi Sándor (1970-) (klimatológus) Túri Zoltán (1980-) (geográfus)
Pályázati támogatás:EFOP-3.6.1-16-2016-00022
EFOP
Stipendium Hungaricum Ösztöndíj Program
Egyéb
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5.

001-es BibID:BIBFORM099669
035-os BibID:(WoS)000746516500001 (Scopus)85123167919 (cikkazonosító)226
Első szerző:Mester Tamás (geográfus)
Cím:Environmental hazards of an unrecultivated liquid waste disposal site on soil and groundwater / Mester Tamás, Szabó György, Sajtos Zsófi, Baranyai Edina, Szabó Gergely, Balla Dániel
Dátum:2022
ISSN:2073-4441
Tárgyszavak:Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Water. - 14 : 2 (2022), p. 1-17. -
További szerzők:Szabó György (1964-) (geográfus, egyetemi tanár) Sajtos Zsófi (1994-) (kémikus) Baranyai Edina (1987-) (környezetkutató) Szabó Gergely (1975-) (geográfus) Balla Dániel Zoltán (1988-) (geográfus)
Pályázati támogatás:NTP-NFTÖ-20-B
Egyéb
ÚNKP-21-4-II
Egyéb
TKP2021-NKTA-32
Egyéb
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Szerző által megadott URL
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6.

001-es BibID:BIBFORM069664
Első szerző:Mester Tamás (geográfus)
Cím:The effects of uninsulated sewage tanks on groundwater. A case study in an eastern Hungarian settlement / Mester Tamás, Szabó György, Bessenyei Éva, Karancsi Gergő, Barkóczi Norbert, Balla Dániel
Dátum:2017
ISSN:1429-7426 2083-4535
Megjegyzések:In our study we attempt to demonstrate the effects of uninsulated sewage tanks, which are the most importantsources of contamination in settlements without sewage systems, on groundwater quality. We comparedthe results of measurements carried out before and one and a half years after the construction of the sewage system.We established 3 m deep monitoring wells within a 25 m radius of a sewage tank, which were then sampled,and the level of groundwater was recorded. The 3D model constructed on the basis of the saturated zoneshows that the effluent wastewater formed a groundwater level dome with a height of more than 1 m. After thesewage tank was taken out of use the difference between the highest and lowest groundwater levels decreased toa few centimetres. In our study we investigated the spatial distribution of NH4+ (ammonium). Using the 3D modelwe were able to precisely determine the volume of water bodies with different levels of contamination. In anapproximately 25 m3 water body, in the immediate environment of a sewage tank in use we detected NH4+ ata concentration which was characteristic of undiluted wastewater (>90 mg?dm?3). After the sewage tank was takenout of use, the concentration in its immediate environment decreased by more than 50%, although almost everywherein the modelled area concentrations were measured above the limit value. Based on the above, we canconclude that the cleaning process has started, but the complete decontamination of the groundwater will takeseveral years.
Tárgyszavak:Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
ammonium
groundwater contamination
groundwater level
modelling
pollution
wastewater
Megjelenés:Journal of Water and Land Development. - 33 : 4-6 (2017), p. 123-129. -
További szerzők:Szabó György (1964-) (geográfus, egyetemi tanár) Bessenyei Éva (1984-) (geográfus) Karancsi Gergő (1988-) (geográfus) Barkóczi Norbert (1990-) (geográfus) Balla Dániel Zoltán (1988-) (geográfus)
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7.

001-es BibID:BIBFORM105120
035-os BibID:(WOS)000869106800001 (Scopus)85139856111 (cikkazonosító)11786221221128789
Első szerző:Mirzaei, Morad
Cím:Soil Nitrous Oxide Emissions Following Crop Residues Management in Corn-Wheat Rotation Under Conventional and No-Tillage Systems / Morad Mirzaei, Manouchehr Gorji Anari, Arezoo Taghizadeh-Toosi, Mohammad Zaman, Nermina Saronjic, Safwan Mohammed, Szilard Szabo, Andrés Caballero-Calvo
Dátum:2022
ISSN:1178-6221
Megjegyzések:Agricultural activity is the major anthropogenic source of nitrous oxide (N2O) emissions from terrestrial ecosystems. Conservation agriculture including crop residue management can play a key role in enhancing soil resilience to climate change and mitigating N2O emissions. We investigated the effects of crop residue rates, including 100 % (R100), 50 % (R50), and residue removal (R0), on N2O emissions in corn-wheat rotation under conventional (CT) and no-tillage (NT) systems. The key factors evaluated affecting N2O emissions included soil temperature, soil moisture, soil ammonium, and soil nitrate concentrations. Results showed that the N2O emissions increased with the increasing rate of residue under both CT and NT systems. Both R100 and R50 significantly (p?<?.05) increased the N2O emissions compared to R0 during the annual rotation cycle. Soil moisture and mineral nitrogen (ammonium and nitrate) were the main driving factors that stimulated N2O emission in both CT and NT systems. In the NT and CT systems, cumulative N2O emissions showed a significant increase with R50 (+75.5 % in NT, +36.5 % in CT) and R100 (+134 % in NT, +40 % in CT) as compared to R0. Furthermore, no significant differences were found between R100 and R50 in the CT system, while in the NT system significant increases were observed for R100 compared to R50. Overall, our study justified as a first approach only during the first year that crop residue removal led to decreased N2O emissions under semi-arid conditions. However, due to the deteriorating impact of crop residue removal on crop productivity and soil C sequestration, this management method cannot be considered a sustainable agronomic practice. We suggest long-term studies to determine the appropriate rate of postharvest crop residue to achieve less N2O emissions and climate-friendly agricultural practices.
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Greenhouse gases
crop residue
soil management
nitrous oxide emission
conventional tillage
no-tillage
global warming
Megjelenés:Air, Soil and Water Research. - 15 (2022), p. 1-12. -
További szerzők:Anari, Manouchehr Gorji Taghizadeh-Toosi, Arezoo Zaman, Mohammad Saronjic, Nermina Mohammed Safwan (1985-) (agrármérnök) Szabó Szilárd (1974-) (geográfus) Caballero-Calvo, Andrés
Pályázati támogatás:NKFI-TNN-123457
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8.

001-es BibID:BIBFORM088332
035-os BibID:(cikkazonosító)2786 (Scopus)85092708721 (WoS)000585255400001
Első szerző:Mohammed Safwan (agrármérnök)
Cím:Estimating Human Impacts on Soil Erosion Considering Different Hillslope Inclinations and Land Uses in the Coastal Region of Syria / Safwan Mohammed, Hazem G. Abdo, Szilard Szabo, Quoc Bao Pham, Imre J. Holb, Nguyen Thi Thuy Linh, Duong Tran Anh, Karam Alsafadi, Ali Mokhtar, Issa Kbibo, Jihad Ibrahim, Jesus Rodrigo-Comino
Dátum:2020
ISSN:2073-4441
Megjegyzések:Soils in the coastal region of Syria (CRoS) are one of the most fragile components of natural ecosystems. However, they are adversely affected by water erosion processes after extreme land cover modifications such as wildfires or intensive agricultural activities. The main goal of this research was to clarify the dynamic interaction between erosion processes and different ecosystem components (inclination, land cover/land use, and rainy storms) along with the vulnerable territory of the CRoS. Experiments were carried out in five different locations using a total of 15 erosion plots. Soil loss and runoff were quantified in each experimental plot, considering different inclinations and land uses (agricultural land (AG), burnt forest (BF), forest/control plot (F)). Observed runoff and soil loss varied greatly according to both inclination and land cover after 750 mm of rainfall (26 events). In the cultivated areas, the average soil water erosion ranged between 0.14 ? 0.07 and 0.74 ? 0.33 kg/m2; in the BF plots, mean soil erosion ranged between 0.03 ? 0.01 and 0.24 ? 0.10 kg/m2. The lowest amount of erosion was recorded in the F plots where the erosion ranged between 0.1 ? 0.001 and 0.07 ? 0.03 kg/m2. Interestingly, the General Linear Model revealed that all factors (i.e., inclination, rainfall and land use) had a significant (p < 0.001) effect on the soil loss. We concluded that human activities greatly influenced soil erosion rates, being higher in the AG lands, followed by BF and F. Therefore, the current study could be very useful to policymakers and planners for proposing immediate conservation or restoration plans in a less studied area which has been shown to be vulnerable to soil erosion processes.
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
soil management
land cover changes
Syria
soil erosion
hillslopes
Megjelenés:Water. - 12 : 10 (2020), p. 1-25. -
További szerzők:Abdo, Hazem Ghassan Szabó Szilárd (1974-) (geográfus) Pham, Quoc Bao Holb Imre (1973-) (agrármérnök) Linh, Nguyen Thi Thuy Anh, Duong Tran Alsafadi, Karam Mokhtar, Ali Kbibo, Issa Ibrahim, Jihad Rodrigo-Comino, Jesús
Pályázati támogatás:Tématerületi Kiválósági Program (ED_18-1-2019-0028)
Egyéb
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9.

001-es BibID:BIBFORM087876
035-os BibID:(cikkazonosító)2529 (Scopus)85090981264 (WoS)000581970800001
Első szerző:Mohammed Safwan (agrármérnök)
Cím:Soil Management Effects on Soil Water Erosion and Runoff in Central Syria : A Comparative Evaluation of General Linear Model and Random Forest Regression / Safwan Mohammed, Ali Al-Ebraheem, Imre J. Holb, Karam Alsafadi, Mohammad Dikkeh, Quoc Bao Pham, Nguyen Thi Thuy Linh, Szilard Szabo
Dátum:2020
ISSN:2073-4441
Tárgyszavak:Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Megjelenés:Water. - 12 : 9 (2020), p. 1-19. -
További szerzők:Al-Ebraheem, Ali Holb Imre (1973-) (agrármérnök) Alsafadi, Karam Dikkeh, Mohammad Pham, Quoc Bao Linh, Nguyen Thi Thuy Szabó Szilárd (1974-) (geográfus)
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10.

001-es BibID:BIBFORM082562
035-os BibID:(WoS)000457952700087 (Scopus)85058663446
Első szerző:Rawat, Kishan Singh
Cím:Estimation of crop evapotranspiration through spatial distributed crop coefficient in a semi-arid environment / Kishan Singh Rawat, Sudhir Kumar Singh, Anju Bala, Szilárd Szabó
Dátum:2019
ISSN:0378-3774
Megjegyzések:Accurate and reliable estimation of reference crop evapotranspiration (ETo) is important due to its critical role in determining crop water requirement in irrigated agriculture. The aim of the paper was to estimate the evapotranspiration (ETc) using spatially distributed crop coefficient (Kc) and open access earth observing datasets in a semi-arid environment. We have estimated the actual evapotranspiration (ETc) based on spatially distributed crop coefficient (Kc) using following models namely Surface Energy Balance Algorithm for Land (SEBAL), Makkink model, Hargreaves and Samani model, Camargo method and Jensen-Haise model. Further, these models estimates were compared with Penman-Monteith estimate. Comparative evaluation of models was performed through statistical tests, and it was found that the Makkink model performed satisfactory compared with standard Penman-Monteith model estimate (R2=0.88). Leaf area index (LAI) and the Kc was in strong (second order polynomial) relationship (R2=0.98). The analysis also shows distributed actual evapotranspiration based on Makkink model has good agreement with actual evapotranspiration from Penman-Monteith with R2 of 0.84, respectively, for the study area. The finding suggests that the Makkink model estimates ETo are very close to the universally accepted Penman-Monteith model based ETo.
Tárgyszavak:Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
Actual evapotranspiration
Wheat
Crop coefficient
SEBAL model
Penman-Monteith method
Megjelenés:Agricultural Water Management. - 213 (2019), p. 922-933. -
További szerzők:Kumar Singh, Sudhir Bala, Anju Szabó Szilárd (1974-) (geográfus)
Pályázati támogatás:4th thematic program of the University of Debrecen
FIKP
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11.

001-es BibID:BIBFORM063024
Első szerző:Szabó György (geográfus, egyetemi tanár)
Cím:The Use of Sodium to Calibrate the Transport Modeling of Water Pollution in Sandy Formations Around an Uninsulated Sewage Disposal Site / György Szabó, Éva Bessenyei, Andor Hajnal, István Csige, Gergely Szabó, Csaba Tóth, József Posta, Tamás Mester
Dátum:2016
ISSN:0049-6979
Megjegyzések:In the present paper we suggest a novel calibration method of the model for hydrodynamic and contaminant transport using the example of a sewage disposal site set up uninsulated in a sandy environment. With the hydrodynamic model we applied time-dependent model calculations in order to fit the individual hydrodynamic parameters. For the calibration of the transport model, sodium was chosen, which has a negligible retardation factor. We demonstrated that this approach is suitable for creating a model that provides calculated results comparable to the actually measured, experimental ones. The created model proved to be appropriate for use in the estimation of the maximal spatial extension of the contamination, which - in the case of the investigated sewage disposal site - was found to be 0.1 km2 in the near-surface (1-3 m deep) layers, whereas it was three times higher at a depth of 40-60 m.
Tárgyszavak:Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban
Doktori Iskola
Megjelenés:Water Air And Soil Pollution. - 227 : 2 (2016), p. 1-13. -
További szerzők:Bessenyei Éva (1984-) (geográfus) Hajnal Andor (1986-) (okleveles geográfus, geológia szakirány) Csige István (1962-) (fizikus) Szabó Gergely (1975-) (geográfus) Tóth Csaba Albert (1971-) (geográfus) Posta József (1948-) (vegyész, analitikus) Mester Tamás (1991-) (geográfus)
Pályázati támogatás:TÁMOP-4.2.2/B-10/1-2010-0024
TÁMOP
Földtudományok Doktori Iskola
TÁMOP 4.2.4. A/2-11-1-2012-0001
TÁMOP
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12.

001-es BibID:BIBFORM083813
035-os BibID:(cikkazonosító)563 (Scopus)85081747794 (WoS)000519846500254
Első szerző:Szabó Zsuzsanna (környezetgazdálkodási és vidékfejlesztési agrármérnök)
Cím:Geomorphology as a Driver of Heavy Metal Accumulation Patterns in a Floodplain / Szabó Zsuzsanna, Buró Botond, Szabó József, Tóth Csaba Albert, Baranyai Edina, Herman Petra, Prokisch József, Tomor Tamás, Szabó Szilárd
Dátum:2020
ISSN:2073-4441
Megjegyzések:The spatial complexity of floodplains is a function of several processes: hydrodynamics, flow direction, sediment transportation, and land use. Sediments can bind toxic elements, and as there are several pollution sources, the risk of heavy metal accumulation on the floodplains is high. We aimed to determine whether fluvial forms have a role in metal accumulations. Topsoil samples were taken from point bars and swales in the floodplain of the Tisza River, North-East Hungary. Soil properties and metal concentrations were determined, and correlation and hypothesis testing were applied. The results showed that fluvial forms are important drivers of horizontal metal patterns: there were significant differences (p < 0.05) between point bars and swales regarding Fe, K, Mg, Mn, Cr, Cu, Ni, Pb, and Zn. Vertical distribution also differed significantly by fluvial forms: swales had higher metal concentrations in all layers. General Linear Models had different results for macro and micro elements: macro element concentrations were determined by the organic matter, while for micro elements the clay content and the forms were significant explanatory variables. These findings are important for land managers and farmers because heavy metal concentration has a direct impact on living organisms, and the risk of bioaccumulation can be high on floodplains.
Tárgyszavak:Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
fluvial landforms
swale
point bar
topsoil samples
vertical contamination
General Linear Model (GLM)
Megjelenés:Water. - 12 : 2 (2020), p. 1-16. -
További szerzők:Buró Botond (1986-) (geográfus) Szabó József (1940-) (geográfus) Tóth Csaba Albert (1971-) (geográfus) Baranyai Edina (1987-) (környezetkutató) Herman Petra (1994-) (környezetkutató) Prokisch József (1966-) (vegyész) Tomor Tamás (1976-) (geográfus) Szabó Szilárd (1974-) (geográfus)
Pályázati támogatás:GINOP-2.3.2-15-2016-00009'ICER'
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ÚNKP-18-3 New National Excellence Program of the Ministry of Human Capacities
Egyéb
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DOI
Intézményi repozitóriumban (DEA) tárolt változat
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