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1.

001-es BibID:BIBFORM018806
Első szerző:Gosztonyi Gyöngyi
Cím:Examination of zinc and iron mobilization with acid treatments and the metal content of maize and stinging nettle in the active floodplain of the River Tisza / Gyöngyi Gosztonyi, Mihály Braun, József Prokisch, Szilárd Szabó
Dátum:2011
Megjegyzések:n this paper the mobilization of zinc and iron was studied in soil samples from the Boroszló-kert Dead-Tisza region. Besides the determination of the soil characterizations, the effects of different acid treatments on the metal mobilization were examined with nitric acid in five concentrations and with three extraction times. HNO3+H2O2 digestion and NH4-acetate + EDTA extraction were also carried out. Moreover, the metal uptake of two plant species (Zea mays from ploughlands, and Urtica dioica L. from orchards) was also studied. The decrease of pH caused significant metal mobilization, and the change of the pH is closely related to the soil properties, especially to the granulometric composition. Fe was less mobilizable than Zn. More metal was mobilized from the samples derived from ploughlands, and maize accumulated more Zn and Fe. However, the samples of ploughlands contained more CaCO3 than the samples from orchards.
Tárgyszavak:Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban
metal mobilization
active floodplain
zinc
iron
Zea mays
Urtica dioica
Megjelenés:Carphatian Journal of Earth and Environmental Sciences. - 6 : 2 (2011), p. 25-33. -
További szerzők:Braun Mihály (1966-) (vegyész, analitikus) Prokisch József (1966-) (vegyész) Szabó Szilárd (1974-) (geográfus)
Pályázati támogatás:OTKA
68566
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2.

001-es BibID:BIBFORM063031
Első szerző:Nagy Richárd (geográfus)
Cím:Evaluation of the relationship between soil properties and vineyards: a case study from a cool climate wine region of Hungary / Nagy Richárd, Zsófi Zsolt, Papp István, Földvári Mária, Kerényi Attila, Szabó Szilárd
Dátum:2012
ISSN:1842-4090 1844-489X
Megjegyzések:Sedimentological investigations and thermal analyses were carried out in a steep slope vineyard in 2007 (Nagy-Eged hill - located in the north-eastern part of Hungary). This area is proned extremely eroded due to its significant steepness and vine-growing cultivation. Soil thickness is approximately 50 cm near the top while at the bottom the thickness of horizon A alone reaches up to 150 cm. According to the results the ratio of fractions smaller than 0.02 mm and those larger than 2 mm between the top and the bottom is reverse. In the lower slope section the ratio of particles smaller than 0.02 mm is three times that in the upper slope section. Similarly the ratio of particles larger than 2 mm in the lower slope section is five times that in the upper slope section. The quantity of clay minerals measured by thermal analysis is larger than that measured by elutriation indicating that a part of them exceeds the diameter of 2?m. Our results revealed the effects of soil erosion on the mineral composition of the soil. The amount of clay minerals (e.g. montmorillonite) is about the double in the lower section, than in the upper of the slope. Clay minerals caused negative water budget in the upper levels resulting in the occurrence of anthropogenic water deficit as the consequence of soil erosion. Therefore vegetative growth of plants in the lower areas is better than that of those in the upper areas.
Tárgyszavak:Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban
terroir
soil erosion
Sedimentology
thermal analysis
clay mineral
lack of water
vegetative growth
Megjelenés:Carpathian Journal of Earth and Environmental Sciences. - 7 : 1 (2012), p. 223-230. -
További szerzők:Zsófi Zsolt (1970-) (biológus) Papp István (1980-) (vegyész) Földvári Mária Kerényi Attila (1943-2023) (geográfus) Szabó Szilárd (1974-) (geográfus)
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3.

001-es BibID:BIBFORM051752
Első szerző:Paládi Mónika (geográfus)
Cím:Firewood consumption and CO2 emission of detached houses in rural environment, NE-Hungary / Paládi Mónika, Szabó Szilárd, Megyeri-Runyó Anna, Kerényi Attila
Dátum:2014
ISSN:1842-4090 (print) 1844-489X (online)
Megjegyzések:We aimed to study the CO2 emissions of detached houses using firewood for heating, using the example of a Hungarian village (Milota). We presented Hungary's CO2 emission structure and discussed the increasing ratio of firewood heating in households in relation to the increasing level of poverty in the population and the increasing price of natural gas. The annual firewood consumption of 22 households in an eastern Hungarian village in a rural environment was measured and the associated CO2 emissions were calculated. We found that the material of the walls was relevant; however, age structure was not important in the volume of the burnt firewood. Outdoor temperature determined significantly the amount of combusted wood and the analyses also revealed that heating habits (considering the daily routines of weekdays and weekends) can also influence CO2 emissions. It is argued that using firewood for heating is beneficial at both local and national levels since the absorption capacity of forests in Hungary can keep pace with firewood combustion emissions; although, they can absorb only 48.6% of total household CO2 emissions. At a global level, however, firewood combustion increases the CO2 content of the atmosphere.
Tárgyszavak:Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban
firewood consumption
CO2 emission
woodlands
climate protection
family habits
Hungary
Doktori iskola
Megjelenés:Carpathian Journal of Earth and Environmental Sciences. - 9 : 1 (2014), p. 199-208. -
További szerzők:Szabó Szilárd (1974-) (geográfus) Megyeri-Runyó Anna (1965-) (biológia-földrajz szakos tanár) Kerényi Attila (1943-2023) (geográfus)
Pályázati támogatás:TÁMOP-4.2.2/B-10/1-2010-0024
TÁMOP
Földtudományok Doktori Iskola
TÁMOP-4.2.2.A-11/1/KONV-2012-0041
TÁMOP
TÁMOP 4.2.4. A/2-11-1-2012-0001
TÁMOP
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4.

001-es BibID:BIBFORM087952
Első szerző:Phinzi, Kwanele
Cím:Comparison of Rusle and Supervised Classification Algorithms for Identifying Erosion-Prone Areas in a Mountainous Rural Landscape / Kwanele Phinzi, Njoya Silas Ngetar, Osadolor Ebhuoma, Szilárd Szabó
Dátum:2020
Megjegyzések:The identification of erosion prone areas with reasonably high accuracy is a prerequisite for formulating relevant soil conservation measures especially in rural areas where there is much reliance on subsistence agriculture. The aim of this paper was to compare and exploit the complementary advantage of fusing three independent methods including the Revised Universal Soil Loss Equation (RUSLE) and two supervised image classification algorithms: Random Forest (RF) and Maximum Likelihood (ML). All analyses were conducted using a GIS proprietary software, ArcGIS. The results indicated that RF was the best with the highest overall accuracy (OA), producer's accuracy (PA), and user's accuracy (UA) of 87%, 78%, and 95%, respectively. RUSLE poorly performed relative to other methods, scoring the lowest PA (34%) and OA (66%), but slightly outperformed ML in terms of UA. From the user's perspective, the performance of individual methods was satisfactory with each method achieving an UA of greater than 90% although ML and RUSLE were not satisfactory from the producer's perspective, recording respective PAs of 56% and 34%. When the results from individual methods were fused, the accuracy increased above 90% across all accuracy indices, which is far above the 85% acceptable level for planning and management purposes.
Tárgyszavak:Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban
folyóiratcikk
RUSLE
supervised classification
random forest
maximum likelihood
soil erosion
Megjelenés:Carpathian Journal of Earth and Environmental Science. - 15 : 2 (2020), p. 405-413. -
További szerzők:Ngetar Njoya Silas Ebhuoma Osadolor Szabó Szilárd (1974-) (geográfus)
Pályázati támogatás:TKP - Thematic Excellence Programme of the Ministry for Innovation and Technology in Hungary (ED 18-1-2019-0028)
Egyéb
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DOI
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5.

001-es BibID:BIBFORM037388
Első szerző:Szabó Szilárd (geográfus)
Cím:Tools for Landscape Ecological Planning : Scale, and Aggregation Sensitivity of the Contagion type Landscape Metric Indices / Szabó Szilárd, Csorba Péter, Szilassi Péter
Dátum:2012
Megjegyzések:The major objective of this study is to investigate the aggregation (class number), and scale (cell size) dependence of the contagion landscape indices. A detailed statistical analysis of theoretical habitat patterns using 1 km cell size, 64 and 81 ha areas has been delineated. Simple aggregated and dispersed, regular and irregular patterns were created, and their characteristics were revealed by using contagion type landscape metrics (aggregation, intermixing and subdivision indices) on the class and landscape level, as well as the influence of the number of classes and spatial resolution in their values. Cross-correlations were also explored. Our results show that all metrics are sensitive to the number of classes; they produced different values using the same pattern for 2-3-4 classes, except with the Aggregation Index. Resolution (cell size) has a significant effect on the values of the aggregation indices: comparing the applied 100, 250 and 500 m resolutions to the native 1000 m, it has been observed that the range of values decreased to half of the possible. This means that aggregation indices need a heuristically determined cell size that differs from the needs of other metrics. This study highlights that the interspersion and subdivision indices are not scale dependent landscape indices. Aggregation metrics (Aggregation Index, Percentage of Like Adjacencies, Clumpiness Index) and subdivision metrics (Effective Mesh Size, Splitting Index, Division Index) do not correlate with each other, but they are in a strong relationship within their groups. The Interspersion Index does not correlate with these landscapes metric parameters; its application can be recommended due to its uniqueness. Despite the strong correlations, it is advisable to use the indices in parallel according to the differing calculation methods on landscape ecological planning. Cross-correlation matrix changes with the grain size, but it is not significant.
ISBN:1842-4090
Tárgyszavak:Természettudományok Környezettudományok idegen nyelvű folyóiratközlemény külföldi lapban
landscape metrics
contagion
spatial patterns
ecological planning
ecological networks
Megjelenés:Carpathian Journal of Earth and Environmental Sciences. - 7 : 3 (2012), p. 127-136. -
További szerzők:Csorba Péter (1953-) (geográfus) Szilassi Péter
Pályázati támogatás:TÁMOP-4.2.2/B-10/1-2010-0024
TÁMOP
Bolyai János Kutatási Ösztöndíj
Egyéb
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6.

001-es BibID:BIBFORM061843
Első szerző:Türk Gábor (biológia környezettan tanár)
Cím:Process of overturning due to a floodwave in an oxbow lake of Tisza River / Gábor Türk, László Bertalan, Boglárka Balázs, Edina Fehérné Baranyai, Szilárd Szabó
Dátum:2016
ISSN:1842-4090 1844-489X
Megjegyzések:Recently, various researches have focused on the environmental condition assessment of oxbow lakes along rivers. In this study we investigated the bed morphology, conductivity and the changes of macro- and microelements in the oxbow, named Kacsa-tó, that was formed by the 45th cutoff on Tisza River, then the results were plotted using GIS softwares. Our aim was to examine the specific electric conductivity and its spatial pattern at the end of the spring flood at 2013. We analyzed water samples collected by a stratified sampling system so as to conclude the extent of overturning. The inflow from the flood resulted lower conductivity values at the extensive SE part than at the distant NW part. Initially the fresh water supply from the flood does not reach the distant parts; thus, the overturning takes place more slowly so the water body replacement of the oxbow occurs constantly. Our results show that at the beginning of the flood the oxbow could be divided into two distinct heterogeneous parts. Based on the conductivity values at time of the measurement, we found that the overturning is not yet complete.
Tárgyszavak:Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban
conductivity
morphology
bed morphology
Tisza River
modelling
geoinformatics
water quality
Megjelenés:Carpathian Journal of Earth and Environmental Sciences. - 11 : 1 (2016), p. 255-264. -
További szerzők:Bertalan László (1989-) (geográfus) Balázs Boglárka (1985-) (geográfus) Baranyai Edina (1987-) (környezetkutató) Szabó Szilárd (1974-) (geográfus)
Pályázati támogatás:University of Debrecen (RH/751/2015)
Egyéb
SROP-4.2.2.B-15/1/KONV-2015-0001
Egyéb
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