TY - JOUR AU - Nagy, Balázs AU - Ignéczi, Ádám AU - Kovács, József AU - Szalai, Zoltán AU - Mari, László TI - Shallow ground temperature measurements on the highest volcano on Earth, Mt. Ojos del Salado, Arid Andes, Chile JF - PERMAFROST AND PERIGLACIAL PROCESSES J2 - PERMAFROST PERIGLAC VL - 30 PY - 2019 IS - 1 SP - 3 EP - 18 PG - 16 SN - 1045-6740 DO - 10.1002/ppp.1989 UR - https://m2.mtmt.hu/api/publication/30326045 ID - 30326045 N1 - \n Department of Physical Geography, Eötvös University, Budapest, Hungary \n Department of Geography, University of Sheffield, Sheffield, United Kingdom \n Department of Physical and Applied Geology, Eötvös University, Budapest, Hungary \n Department of Environmental and Landscape Geography, Eötvös University, Budapest, Hungary/Geographical Institute, MTA Research Centre for Astronomy and Earth Sciences, Budapest, Hungary \n Export Date: 28 November 2018 \n Article in Press \n CODEN: PEPPE \n Correspondence Address: Ignéczi, Á.; Department of Geography, University of SheffieldUnited Kingdom; email: a.igneczi@sheffield.ac.uk Funding Agency and Grant Number: Embassy of Hungary in Chile; Ice and Climate Research at Sheffield; Foldgomb Foundation; Chilean-Hungarian Chamber of Commerce (Camara Chileno-Hungara de Comercio) Funding text: Embassy of Hungary in Chile and the Chilean-Hungarian Chamber of Commerce (Camara Chileno-Hungara de Comercio) for support; Ice and Climate Research at Sheffield (ICERS); Foldgomb Foundation LA - English DB - MTMT ER - TY - JOUR AU - Baricza, Ágnes AU - Bajnóczi, Bernadett AU - Kovács, József AU - May, Zoltán AU - Szabó, Máté Zoltán AU - Szabó, Csaba AU - Tóth, Mária TI - Chemical durability of lead-bearing glazes in sulphuric acid solutions — Laboratory experiments performed on Zsolnay architectural ceramics from Budapest (Hungary) JF - INTERNATIONAL JOURNAL OF ARCHITECTURAL HERITAGE J2 - INT J ARCHIT HERIT VL - 12 PY - 2018 IS - 2 SP - 216 EP - 236 PG - 21 SN - 1558-3058 DO - 10.1080/15583058.2017.1396381 UR - https://m2.mtmt.hu/api/publication/3300740 ID - 3300740 LA - English DB - MTMT ER - TY - JOUR AU - Botfalvai, Gábor AU - Csiki-Sava, Z AU - Grigorescu, D AU - Vasile, Ş TI - Taphonomical and palaeoecological investigation of the Late Cretaceous (Maastrichtian) Tuştea vertebrate assemblage (Romania; Haţeg Basin) - insights into a unique dinosaur nesting locality JF - PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY J2 - PALAEOGEOGR PALAEOCL VL - 468 PY - 2017 SP - 228 EP - 262 PG - 35 SN - 0031-0182 DO - 10.1016/j.palaeo.2016.12.003 UR - https://m2.mtmt.hu/api/publication/3168501 ID - 3168501 N1 - Funding Agency and Grant Number: National Geographic Society [3510-87]; National Science Foundation [INT-8619987]; Romanian Academy of Sciences [GAR 165/1997, 39/2001-2002]; National Research Council of Romania (CNCSIS - UEFISCDI) [1163 CNCSIS-A/2004, 1677 CNCSIS-A/2007, 1930 IDEI PCE/2009]; university of Bucharest; university of Petrosani; Hidroconstructia SA - Raul Mare; Mayoralty of General Berthelot; MTA Lendalet Program [95102]; Campus Hungary Fellowship (Balassi Institute) [CHP/121-10/2014]; National Research, Development and Innovation Office [K116665] Funding text: First and foremost, we want to thank the members of the crews who worked at Tu tea between 1988 and 2011 (far too many to list them here) for their assistance in the fieldwork, as well as for their help in preparing the large number of remains recovered from this quarry. Along the years, excavations at the site were supported by grants from the National Geographic Society (3510-87) and National Science Foundation (INT-8619987; both to David Weishampel and DG), the Romanian Academy of Sciences (grants GAR 165/1997 and 39/2001-2002 to DG), the National Research Council of Romania (CNCSIS - UEFISCDI; grants 1163 CNCSIS-A/2004 and 1677 CNCSIS-A/2007 to DG, and 1930 IDEI PCE/2009 to ZCS-S), as well as by the universities of Bucharest and Petrosani, the Hidroconstructia SA - Raul Mare, and the Mayoralty of General Berthelot. Permits to work at the site were issued by the Administration of the Hateg County Dinosaurs Geopark. This project was also supported by MTA Lendalet Program (Grant no. 95102 to Attila Osi), the Campus Hungary Fellowship (Balassi Institute: CHP/121-10/2014 to GB) and the National Research, Development and Innovation Office (Grant no. K116665 to Attila Osi). GB thanks the staff of the Department of Applied and Physical Geology and the Department of Paleontology, ELTE, Budapest, for their support and help provided through the years, particularly Edina Prondvai and Attila Osi (MTA-ELTE Dinosaur Research Group, Budapest), and Andrea Mindszenty (Department of Applied and Physical Geology, Budapest). This is MTA-MTM-ELTE Paleo contribution no. 237. Comments by the reviewer (Spencer G. Lucas) have helped to improve a previous version of the manuscript. LA - English DB - MTMT ER - TY - JOUR AU - Erhardt, Ildikó AU - Ötvös, V AU - Erőss, Anita AU - Czauner, Brigitta AU - Simon, Szilvia AU - Mádlné Szőnyi, Judit TI - Hydraulic evaluation of the hypogenic karst area in Budapest (Hungary) JF - HYDROGEOLOGY JOURNAL J2 - HYDROGEOL J VL - 25 PY - 2017 IS - 6 SP - 1871 EP - 1891 PG - 21 SN - 1431-2174 DO - 10.1007/s10040-017-1591-3 UR - https://m2.mtmt.hu/api/publication/3215600 ID - 3215600 N1 - Government Office for Vas County Department of Environmental Protection and Nature Conservation Management, Vörösmarty utca 2, Szombathely, 9700, Hungary Sopron Waterworks Co, Bartók Béla utca, Sopron, 42, Hungary József and Erzsébet Endowed Hydrogeology Chair, Dept. of Physical and Applied Geology, Institute of Geography and Earth Sciences, Eötvös Loránd University, Pázmány Péter sétány 1/c, Budapest, 1117, Hungary Cited By :11 Export Date: 23 May 2022 Correspondence Address: Erhardt, I.; Government Office for Vas County Department of Environmental Protection and Nature Conservation Management, Vörösmarty utca 2, Hungary; email: erhardtildi@gmail.com LA - English DB - MTMT ER - TY - JOUR AU - Farics, Éva AU - Farics, D AU - Kovács, József AU - Haas, János TI - Interpretation of sedimentological processes of coarse-grained deposits applying a novel combined cluster and discriminant analysis JF - OPEN GEOSCIENCES J2 - OPEN GEOSCI VL - 9 PY - 2017 IS - 1 SP - 525 EP - 538 PG - 14 SN - 2391-5447 DO - 10.1515/geo-2017-0040 UR - https://m2.mtmt.hu/api/publication/3302122 ID - 3302122 N1 - Department of Physical and Applied Geology, Eötvös Loránd University, Pázmány Péter stny. 1/C, Budapest, H-1117, Hungary MTA-ELTE Geological, Geophysical and Space Science Research Group, Pázmány Péter stny. 1/C, Budapest, H-1117, Hungary Engineering Information Technology, Budapest University of Technology and Economics, Budapest, Hungary Export Date: 22 November 2019 Correspondence Address: Farics, E.; Department of Physical and Applied Geology, Eötvös Loránd University, Pázmány Péter stny. 1/C, Hungary; email: eva.gyorfy@gmail.com Department of Physical and Applied Geology, Eötvös Loránd University, Pázmány Péter stny. 1/C, Budapest, H-1117, Hungary MTA-ELTE Geological, Geophysical and Space Science Research Group, Pázmány Péter stny. 1/C, Budapest, H-1117, Hungary Engineering Information Technology, Budapest University of Technology and Economics, Budapest, Hungary Export Date: 26 November 2019 Correspondence Address: Farics, E.; Department of Physical and Applied Geology, Eötvös Loránd University, Pázmány Péter stny. 1/C, Hungary; email: eva.gyorfy@gmail.com LA - English DB - MTMT ER - TY - JOUR AU - Kovács, József AU - Tanos, Péter AU - Várbíró, Gábor AU - Anda, Angéla AU - Molnár, Sándor AU - Hatvani, István Gábor TI - The role of annual periodic behavior of water quality parameters in primary production. chlorophyll-a estimation TS - chlorophyll-a estimation JF - ECOLOGICAL INDICATORS J2 - ECOL INDIC VL - 78 PY - 2017 SP - 311 EP - 321 PG - 11 SN - 1470-160X DO - 10.1016/j.ecolind.2017.03.002 UR - https://m2.mtmt.hu/api/publication/3194648 ID - 3194648 LA - English DB - MTMT ER - TY - JOUR AU - Kovács, József AU - Erőss, Anita TI - Statistically optimal grouping using combined cluster and discriminant analysis (CCDA) on a geochemical database of thermal karst waters in Budapest JF - APPLIED GEOCHEMISTRY J2 - APPL GEOCHEM VL - 84 PY - 2017 SP - 76 EP - 86 PG - 11 SN - 0883-2927 DO - 10.1016/j.apgeochem.2017.05.009 UR - https://m2.mtmt.hu/api/publication/3290776 ID - 3290776 N1 - Cited By :8 Export Date: 18 November 2022 CODEN: APPGE Correspondence Address: Erőss, A.; József & Erzsébet Tóth Endowed Hydrogeology Chair, Pázmány Péter Sétány 1/c, Hungary; email: anita.eross@geoleogy.elte.hu AB - Budapest, the capital of Hungary, is famous for its abundant thermal waters. The monitoring network of the thermal karst waters of Budapest consists of 27 sampling locations, from which data for six geochemical parameters and temperature were available for the period 1960-2010. Based on this data, the optimal grouping for the sampling locations was sought using combined cluster and discriminant analysis. Furthermore, the homogeneity of the obtained groups, as well as temporal changes in the overall monitoring system were investigated. The seven groups found are in accordance with the previously established hydrogeological conditions, i.e. the grouping can be considered as optimal. The results obtained using combined cluster and discriminant analysis on the geochemical and temperature database of Budapest have important practical implications, since the thermal waters are an intensely used resource. Any artificial intervention will influence locations belonging to the same group, and therefore the optimal grouping of sampling locations will help in the planning of further activities, This case study might serve as an example in other settings where multiple measurements at multiple sampling locations from a monitoring network are available. (C) 2017 Elsevier Ltd. All rights reserved. LA - English DB - MTMT ER - TY - JOUR AU - Chapman, DV AU - Bradley, C AU - Gettel, GM AU - Hatvani, István Gábor AU - Hein, T AU - Kovács, József AU - Liska, I AU - Oliver, DM AU - Tanos, Péter AU - Trásy, Balázs AU - Várbíró, Gábor TI - Developments in water quality monitoring and management in large river catchments using the Danube River as an example JF - ENVIRONMENTAL SCIENCE & POLICY J2 - ENVIRON SCI POLICY VL - 64 PY - 2016 SP - 141 EP - 154 PG - 14 SN - 1462-9011 DO - 10.1016/j.envsci.2016.06.015 UR - https://m2.mtmt.hu/api/publication/3090785 ID - 3090785 N1 - Funding Agency and Grant Number: European UnionEuropean Commission [603805]; MTA "Lendulet" program [LP2012-27/2012]; Janos Bolyai Research Scholarship of the Hungarian Academy of SciencesHungarian Academy of Sciences Funding text: The authors are grateful to Zoran Major of the ICPDR Secretariat for support in producing the maps and Prof. Alfred P. Blaschke for providing the data for the case study in the Appendix. This paper is an output of the DANCERS project, which was funded by the European Union's Seventh Framework Programme for research, technological development and demonstration under grant agreement no. 603805. In addition authors would like to thank the MTA "Lendulet" program (LP2012-27/2012) and the Janos Bolyai Research Scholarship of the Hungarian Academy of Sciences for their support. LA - English DB - MTMT ER - TY - JOUR AU - Bánfi, Renáta AU - Pohner, Zsuzsanna AU - Kovács, József AU - Luzics, Szabina AU - Nagy, A AU - Dudás, M AU - Tanos, Péter AU - Márialigeti, Károly AU - Vajna, Balázs TI - Characterisation of the large-scale production process of oyster mushroom (Pleurotus ostreatus) with the analysis of succession and spatial heterogeneity of lignocellulolytic enzyme activities JF - FUNGAL BIOLOGY J2 - FUNGAL BIOL-UK VL - 119 PY - 2015 IS - 12 SP - 1354 EP - 1363 PG - 10 SN - 1878-6146 DO - 10.1016/j.funbio.2015.10.003 UR - https://m2.mtmt.hu/api/publication/2971764 ID - 2971764 N1 - Department of Microbiology, Eötvös Loránd University, Pázmány Péter sétany 1/C, Budapest, 1117, Hungary Department of Physical and Applied Geology, Eötvös Loránd University, Pázmány Péter sétany 1/C, Budapest, 1117, Hungary Pilze-Nagy Ltd., Talfája 50, Kecskemét, H-6000, Hungary Cited By :17 Export Date: 28 April 2023 Correspondence Address: Bánfi, R.; Department of Microbiology, Pázmány Péter sétany 1/C, Hungary; email: banfir@gmail.com LA - English DB - MTMT ER - TY - JOUR AU - Erőss, Anita AU - Zsemle, Ferenc AU - Pulay, Eszter TI - Heat potential evaluation of effluent and used thermal waters in Budapest, Hungary JF - CENTRAL EUROPEAN GEOLOGY J2 - CENT EUR GEOL VL - 58 PY - 2015 IS - 1-2 SP - 62 EP - 71 PG - 10 SN - 1788-2281 DO - 10.1556/24.58.2015.1-2.4 UR - https://m2.mtmt.hu/api/publication/2963171 ID - 2963171 N1 - Cited By :1 Export Date: 18 November 2022 Correspondence Address: Eross, A.; Department of Physical and Applied Geology, Pazmany Peter setany 1/C, Hungary; email: anita.eross@geology.elte.hu LA - English DB - MTMT ER - TY - JOUR AU - Déri-Takács, Judit AU - Erőss, Anita AU - Kovács, József TI - The chemical characterization of the thermal waters in Budapest, Hungary by using multivariate exploratory techniques JF - ENVIRONMENTAL EARTH SCIENCES J2 - ENVIRON EARTH SCI VL - 74 PY - 2015 IS - 12 SP - 7475 EP - 7486 PG - 12 SN - 1866-6280 DO - 10.1007/s12665-014-3904-3 UR - https://m2.mtmt.hu/api/publication/2813140 ID - 2813140 N1 - Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton, AB T6G 2E3, Canada Department of Physical and Applied Geology, Eötvös Loránd University, Pázmány Péter sétány 1/c, Budapest, 1117, Hungary Cited By :11 Export Date: 18 November 2022 Correspondence Address: Déri-Takács, J.; Department of Earth and Atmospheric Sciences, Canada; email: judit@ualberta.ca LA - English DB - MTMT ER - TY - JOUR AU - Mádlné Szőnyi, Judit AU - Virág, Magdolna AU - Zsemle, Ferenc TI - Potential maps for the hydrogeologic prerequisites of the installation of deep geothermal doublets and groundwater source heat pump systems in Budapest, Hungary JF - CENTRAL EUROPEAN GEOLOGY J2 - CENT EUR GEOL VL - 58 PY - 2015 IS - 1-2 SP - 114 EP - 128 PG - 15 SN - 1788-2281 DO - 10.1556/24.58.2015.1-2.8 UR - https://m2.mtmt.hu/api/publication/2949396 ID - 2949396 N1 - Cited By :3 Export Date: 13 July 2022 Correspondence Address: Mádl-Szonyi, J.; Department of Physical and Applied Geology, Pazmany Peter setany 1/C, Hungary; email: madlszonyi.judit@gmail.com LA - English DB - MTMT ER - TY - JOUR AU - Kovács, József AU - Kovács, Solt AU - Hatvani, István Gábor AU - Magyar, Norbert AU - Tanos, Péter AU - Korponai, János AU - Blaschke, AP TI - Spatial Optimization of Monitoring Networks on the Examples of a River, a Lake-Wetland System and a Sub-Surface Water System JF - WATER RESOURCES MANAGEMENT J2 - WATER RESOUR MANAG VL - 29 PY - 2015 IS - 14 SP - 5275 EP - 5294 PG - 20 SN - 0920-4741 DO - 10.1007/s11269-015-1117-5 UR - https://m2.mtmt.hu/api/publication/2938558 ID - 2938558 N1 - Funding Agency and Grant Number: "Lendulet" program of the MTA [LP2012-27/2012]; Pannon University [TAMOP-4.2.2.B-15/1/KONV-2015-0004] Funding text: The authors would like to give thanks to the Austrian Federal Ministry of Agriculture, Forestry, Environment and Water Management, Department VII/Unit 1 National Water Management for the dataset of the Seewinkel and to the "Lendulet" program of the MTA (LP2012-27/2012) & the TAMOP-4.2.2.B-15/1/KONV-2015-0004) project of the Pannon University for the support. AB - Monitoring systems in general have to meet numerous requirements, the most important of which are representativeness and cost efficiency. The aim of the study, therefore, was to present the spatial optimization of the monitoring networks of a river (the Danube), a wetland-lake system (Kis-Balaton & Lake Balaton), and a sub-surface water system in the watershed of Lake Neusiedl/Fertő over a period of approximately two decades using a novel method, Combined cluster and discriminant analysis (CCDA). In the case of the river the results show that the monitoring network yields redundant information on certain sections, so that of 12 sampling sites 3 can be discarded. It was not, however, enough to consider just the tributaries when it comes to optimization. In the case of the wetland (Kis-Balaton) one pair of sampling sites out of 12, while in the case of Lake Balaton 5 out of 10 can be abandoned. For the sub-surface water system, however, all the 50 sites contained exclusive information; hence, all of these were shown to be necessary. In addition, neighboring sampling sites were compared pairwise using CCDA and the corresponding results were visualized in diagrams or so called “difference maps” indicating the location of the biggest differences. This approach also indicates the researcher where to place new sampling sites should the possibility arise. The discussed methodology proved to be highly useful in the optimization of the monitoring networks of the presented water systems. LA - English DB - MTMT ER - TY - JOUR AU - Kovács, József AU - Márkus, László AU - Szalai, József AU - Kovácsné Székely, Ilona TI - Detection and evaluation of changes induced by the diversion of River Danube in the territorial appearance of latent effects governing shallow-groundwater fluctuations JF - JOURNAL OF HYDROLOGY J2 - J HYDROL VL - 520 PY - 2015 SP - 314 EP - 325 PG - 12 SN - 0022-1694 DO - 10.1016/j.jhydrol.2014.11.052 UR - https://m2.mtmt.hu/api/publication/2791757 ID - 2791757 LA - English DB - MTMT ER - TY - JOUR AU - Mádlné Szőnyi, Judit AU - Tóth, Ádám TI - Basin-scale conceptual groundwater flow model for an unconfined and confined thick carbonate region JF - HYDROGEOLOGY JOURNAL J2 - HYDROGEOL J VL - 23 PY - 2015 IS - 7 SP - 1359 EP - 1380 PG - 22 SN - 1431-2174 DO - 10.1007/s10040-015-1274-x UR - https://m2.mtmt.hu/api/publication/2969005 ID - 2969005 N1 - Cited By :70 Export Date: 4 April 2023 Correspondence Address: Mádl-Szőnyi, J.; Department of Physical and Applied Geology, Pázmány P. stny. 1/C, Hungary; email: szjudit@ludens.elte.hu AB - Application of the gravity-driven regional groundwater flow (GDRGF) concept to the hydrogeologically complex thick carbonate system of the Transdanubian Range (TR), Hungary, is justified based on the principle of hydraulic continuity. The GDRGF concept informs about basin hydraulics and groundwater as a geologic agent. It became obvious that the effect of heterogeneity and anisotropy on the flow pattern could be derived from hydraulic reactions of the aquifer system. The topography and heat as driving forces were examined by numerical simulations of flow and heat transport. Evaluation of groups of springs, in terms of related discharge phenomena and regional chloride distribution, reveals the dominance of topography-driven flow when considering flow and related chemical and temperature patterns. Moreover, heat accumulation beneath the confined part of the system also influences these patterns. The presence of cold, lukewarm and thermal springs and related wetlands, creeks, mineral precipitates, and epigenic and hypogenic caves validates the existence of GDRGF in the system. Vice versa, groups of springs reflect rock–water interaction and advective heat transport and inform about basin hydraulics. Based on these findings, a generalized conceptual GDRGF model is proposed for an unconfined and confined carbonate region. An interface was revealed close to the margin of the unconfined and confined carbonates, determined by the GDRGF and freshwater and basinal fluids involved. The application of this model provides a background to interpret manifestations of flowing groundwater in thick carbonates generally, including porosity enlargement and hydrocarbon and heat accumulation. © 2015, Springer-Verlag Berlin Heidelberg. LA - English DB - MTMT ER - TY - CONF AU - Kovácsné Bodor, Petra AU - Tóth, Ádám AU - Kovács, József AU - Mádlné Szőnyi, Judit TI - Multidimensional Data Analysis of Natural Springs in a Carbonate Region T2 - 1st EAGE/TNO Workshop - Basin Hydrodynamic Systems in Relation to their Contained Resources PY - 2015 PG - 5 DO - 10.3997/2214-4609.201412324 UR - https://m2.mtmt.hu/api/publication/2891682 ID - 2891682 LA - English DB - MTMT ER - TY - JOUR AU - Tanos, Péter AU - Kovács, József AU - Kovács, Solt AU - Anda, Angéla AU - Hatvani, István Gábor TI - Optimization of the monitoring network on the River Tisza (Central Europe, Hungary) using combined cluster and discriminant analysis, taking seasonality into account JF - ENVIRONMENTAL MONITORING AND ASSESSMENT J2 - ENVIRON MONIT ASSESS VL - 187 PY - 2015 IS - 9 PG - 14 SN - 0167-6369 DO - 10.1007/s10661-015-4777-y UR - https://m2.mtmt.hu/api/publication/2922356 ID - 2922356 LA - English DB - MTMT ER - TY - JOUR AU - Hatvani, István Gábor AU - Magyar, Norbert AU - Zessner, M AU - Kovács, József AU - Blaschke, A P TI - The Water Framework Directive: Can more information be extracted from groundwater data? A case study of Seewinkel, Burgenland, eastern Austria JF - HYDROGEOLOGY JOURNAL J2 - HYDROGEOL J VL - 22 PY - 2014 IS - 4 SP - 779 EP - 794 PG - 16 SN - 1431-2174 DO - 10.1007/s10040-013-1093-x UR - https://m2.mtmt.hu/api/publication/2477872 ID - 2477872 N1 - Department of Physical and Applied Geology, Eötvös Loránd University, Pázmány P. stny. 1/C, 1117 Budapest, Hungary Institute for Geological and Geochemical Research, Research Centre for Astronomy and Earth Sciences, Hungarian Academy of Sciences, Budaörsi út 45, 1112 Budapest, Hungary Institute of Water Quality, Resources and Waste Management, Vienna University of Technology, Karlsplatz 13/226, 1040 Wien, Austria Institute of Hydraulic Engineering and Water Resources Management, Vienna University of Technology, Karlsplatz 13/222, 1040 Wien, Austria Cited By :23 Export Date: 18 November 2022 Correspondence Address: Hatvani, I. G.; Department of Physical and Applied Geology, Eötvös Loránd University, Pázmány P. stny. 1/C, 1117 Budapest, Hungary; email: hatvaniig@gmail.com AB - Water protection is one of the most important goals in environmental protection. The Clean Water Act in the USA and the Water Framework Directive (WFD) in Europe are the legal frameworks to facilitate the achievement of this goal. The question is raised of whether more information can be extracted from WFD-related groundwater data. To answer it, a methodology has been developed that is easy to use and could be implemented into official practice. A case study is presented in which the groundwater data of a sodic area in Austria (Seewinkel) is assessed. Eighteen parameters in groundwater sampled from 23 wells (1991-2011) were analyzed. With basic statistics, trend-, cluster-, Wilks’ λ and spatial sampling density analysis, local phosphorus and boron phenomena were described, along with the determining role of sulphate, groundwater flow, and the oxygen gradient in the area. As a final step, the spatial sampling density was determined. Regarding the current set of parameters, all the sampling sites are necessary and only in the case of certain parameters (Ca2+, Mg2+, K+, NO3-, pH) could one sampling site be abandoned. The methodology applied brings a new perspective to exploring groundwater data collected according to the requirements of the WFD. LA - English DB - MTMT ER - TY - THES AU - Hatvani, István Gábor TI - Application of state-of-the-art geomathematical methods in water protection Application of state-of-the-art geomathematical methods in water protection - on the example of the data series of the Kis-Balaton Water Protection System PY - 2014 SP - 110 UR - https://m2.mtmt.hu/api/publication/2538169 ID - 2538169 AB - Lakes are sensitive to environmental changes and anthropogenic effects, and Lake Balaton, the largest shallow freshwater lake in Central Europe, is no exception. To protect it (and primarily Keszthely Bay) against elevated nutrient loads, the Kis-Balaton Water Protection System (KBWPS) was constructed as a mitigation wetland at the mouth of the River Zala, the largest tributary of the lake. This work aims to demonstrate the applicability of various multivariate state-of-the art geomathematical methods in water protection, and in parallel to explore the long-term time series of the KBWPS to describe its main processes related to water quality. In the course of the research the time series of a total of 24 weekly and 3 daily sampled natural parameters (variables) were used from 14 sampling sites for various time intervals, out of which the longest was 1977-2009. The analyzed dataset comprised approx. 250,000 data. The methods used comprised the following: descriptive statistics, cluster-, discriminant-, principal component-, dynamic factor-, variogram-, wavelet spectrum and autocorrelation analysis. First the descriptive statistics were formed, after which the sampling sites were clustered for each year, showing that the border between the two Phases changes dynamically, and furthermore, when the runoff in the system was low, Keszthely Bay behaved as a separate entity. In the years with high runoff, however, it displayed a similarity rather to the wetland area of the KBWPS. These results were verified in more than 95% of the cases with discriminant analysis. Secondly, PCA showed that, from the perspective of stochastic relations, the parameters of Keszthely Bay which stand in connection to eutrophication decreased in influence after the settling of the KBWPS. Furthermore, the eutrophication processes moved upstream from Keszthely Bay to the hypertrophic area of KBWPS. This study confirms that the effects of the KBWPS - together with other load reduction measures – have had a beneficial effect on the oligotrophication of Lake Balaton. As for the River Zala, the main input of the KBWPS, it was pointed out that the role of the diffuse and point-source nutrient loads governing most of the river’s processes changed in 1991 because of the socio- economic changes and the measures taken to reduce point source nutrient loads. The penultimate step in the process was periodicity and autocorrelation analyses, which in fact pointed out that the incomplete Phase II is unable to conserve the periodicity of the system and sustain a high autocorrelation because of the shading provided by the macrophyte cover, as well as the extra inflows. As a final step the practice of temporal sampling frequency estimation was described in order to suggest a sampling frequency that is suitable for estimating annual nutrient loads and which nevertheless produces a dataset within which environmental processes can be followed. The results pointed towards a three-day sampling frequency for the whole KBWPS in the case of total phosphorus and total nitrogen (if the purpose of the monitoring is nutrient estimation). This reduction in sampling frequency would make an approx. 50% cost reduction possible. The main achievement of this study was that it pointed out changes in the KBWPS over a long time period using various stochastic methods, most of which have individually never before been applied to such a system, much less in an integrated way. It also underlines the importance of the completion of the unfinished constructional Phase II, so its buffer capacity could be enlarged. Hopefully my work will be of assistance to scientists who wish to gain broader perspectives on both the processes evolving in the KBWPS, and also on the further oligotrophication of Keszthely Bay. LA - English DB - MTMT ER - TY - JOUR AU - Hatvani, István Gábor AU - Clement, Adrienne AU - Kovács, József AU - Kovácsné Székely, Ilona AU - Korponai, János TI - Assessing water-quality data: the relationship between the water quality amelioration of Lake Balaton and the construction of its mitigation wetland JF - JOURNAL OF GREAT LAKES RESEARCH J2 - J GREAT LAKES RES VL - 40 PY - 2014 IS - 1 SP - 115 EP - 125 PG - 1 SN - 0380-1330 DO - 10.1016/j.jglr.2013.12.010 UR - https://m2.mtmt.hu/api/publication/2482550 ID - 2482550 N1 - Funding Agency and Grant Number: European Union; State of Hungary; European Social Fund [4.2.4. A/1-11-1-2012-0001] Funding text: We the authors would like to thank Paul Thatcher for his work on our English versions and say thanks for the stimulating discussions with our colleagues at the Department of Physical and Applied Geology of Eotvos Lorand University. This research was supported by the European Union and the State of Hungary, co-financed by the European Social Fund in the framework of TAMOP 4.2.4. A/1-11-1-2012-0001 'National Excellence Program'. LA - English DB - MTMT ER - TY - JOUR AU - Kovács, József AU - Kovács, Solt AU - Magyar, Norbert AU - Tanos, Péter AU - Hatvani, István Gábor AU - Anda, Angéla TI - Classification into homogeneous groups using combined cluster and discriminant analysis JF - ENVIRONMENTAL MODELLING & SOFTWARE J2 - ENVIRON MODELL SOFTW VL - 57 PY - 2014 SP - 52 EP - 59 PG - 8 SN - 1364-8152 DO - 10.1016/j.envsoft.2014.01.010 UR - https://m2.mtmt.hu/api/publication/2491950 ID - 2491950 LA - English DB - MTMT ER - TY - CHAP AU - Nagy, Balázs AU - Mari, László AU - Kovács, József AU - Nemerkényi, Zsombor AU - Heiling, Zs ED - Cserny, Tibor ED - Kovács-Pálffy, Péter ED - Krivánné, Horváth Ágnes TI - Környezetváltozás a Száraz-Andokban. Az Ojos del Salado monitoring vizsgálata TS - Az Ojos del Salado monitoring vizsgálata T2 - HUNGEO 2014 Magyar Földtudományi szakemberek XII. találkozója PB - Magyarhoni Földtani Társulat CY - Budapest SN - 9789638221537 PY - 2014 SP - 53 EP - 62 PG - 10 DO - 10.13140/2.1.3493.8244 UR - https://m2.mtmt.hu/api/publication/2719983 ID - 2719983 LA - English DB - MTMT ER - TY - JOUR AU - Silye, Lóránd AU - Colin, J-P AU - Codrea, V TI - Globotalicypridea mirabilis sp. nov. – the first non-marine ostracod taxon from the Upper Cretaceous of the Haţeg Basin, Romania JF - ANNALES DE PALEONTOLOGIE J2 - ANN PALEONTOL VL - 100 PY - 2014 IS - 3 SP - 273 EP - 280 PG - 8 SN - 0753-3969 DO - 10.1016/j.annpal.2014.05.001 UR - https://m2.mtmt.hu/api/publication/2715851 ID - 2715851 LA - English DB - MTMT ER - TY - JOUR AU - Magyar, Norbert AU - Hatvani, István Gábor AU - Kovácsné Székely, Ilona AU - Herzig, A AU - Dinka, Mária AU - Kovács, József TI - Application of multivariate statistical methods in determining spatial changes in water quality in the Austrian part of Neusiedler See JF - ECOLOGICAL ENGINEERING J2 - ECOL ENG VL - 55 PY - 2013 SP - 82 EP - 92 PG - 11 SN - 0925-8574 DO - 10.1016/j.ecoleng.2013.02.005 UR - https://m2.mtmt.hu/api/publication/2194328 ID - 2194328 AB - The aim of the present study was to distinguish areas with different chemical properties in Neusiedler See, to determine which background processes are responsible for this pattern, and to discover their spatial distribution. Uni- and multivariate data analysis was applied to the data concerning 13 mainly chemical and some biological parameters for the time period 2000–2009 from 33 sampling sites. The sampling sites were first clustered then grouped. Besides reed belt and open water areas, smaller localities, which are influenced by water inputs (the treatment plant, the river Wulka, the channels of weekend houses) were also distinguished. Using Wilks’ lambda distribution it was determined that the main components (ions) have a greater effect on forming the cluster groups than those parameters which stand in close relation to biological processes. These results concurred with those obtained from the principal component analysis (PCA) conducted on the whole lake and on the groups as well. It can be stated that most of the variance in the dataset can be explained by the main components (ions). The spatial distribution of the principal component scores was visualized with isoline maps. The results of this research lead us to the view that Neusiedler See cannot be treated as one homogeneous system. This exceptional variability originates from the lake's shallow water depth, its unstable water balance, and anthropogenic activity (agriculture, tourism, sewage treatment) in the lake's vicinity. LA - English DB - MTMT ER - TY - CHAP AU - Erőss, Anita AU - Mádlné Szőnyi, Judit AU - Anita, É CSOMA ED - Piotr, Maloszewski ED - Stanisław, Witczak ED - Grzegorz, Malina TI - Hypogenic karst development in a hydrogeological context, Buda Thermal Karst, Budapest, Hungary T2 - Groundwater Quality Sustainability PB - CRC Press - Taylor and Francis Group CY - London SN - 9780415698412 PY - 2012 SP - 119 EP - 133 PG - 15 UR - https://m2.mtmt.hu/api/publication/1897650 ID - 1897650 LA - English DB - MTMT ER - TY - CHAP AU - Kovács, József AU - Tanos, Péter AU - Korponai, János AU - Kovácsné Székely, Ilona AU - Gondár, K AU - Gondár-Sőregi, K AU - Hatvani, István Gábor ED - Kostas, Voudouris ED - Dimitra, Voutsa TI - Analysis of Water Quality Data for Scientists T2 - Water Quality Monitoring and Assessment PB - IntechOpen CY - Rijeka SN - 9789535104865 PY - 2012 SP - 65 EP - 94 PG - 30 DO - 10.5772/32173 UR - https://m2.mtmt.hu/api/publication/1922453 ID - 1922453 LA - English DB - MTMT ER - TY - JOUR AU - Kovács, József AU - Nagy, M AU - Czauner, Brigitta AU - Kovácsné Székely, Ilona AU - Kériné Borsodi, Andrea AU - Hatvani, István Gábor TI - Delimiting sub-areas in water bodies using multivariate data analysis on the example of Lake Balaton (W Hungary) JF - JOURNAL OF ENVIRONMENTAL MANAGEMENT J2 - J ENVIRON MANAGE VL - 110 PY - 2012 SP - 151 EP - 158 PG - 8 SN - 0301-4797 DO - 10.1016/j.jenvman.2012.06.002 UR - https://m2.mtmt.hu/api/publication/1993546 ID - 1993546 AB - The main aim of the European Water Framework Directive (WFD, 2000) is to commit European Union Member states to the achievement of good qualitative and quantitative status for all water bodies by 2015. To achieve this, a reference state has to be determined and appropriate monitoring has to be carried out. Based on the fact that the WFD classifies Lake Balaton, the largest shallow freshwater lake in Central Europe, as one water body, and due to the lack of funds, the number of sampling locations on the lake was decreased. The aim of this study was to determine how many sub-areas with different WFDrelated attributes (in this case, parameters) can be delimited in the so-called one water body of Lake Balaton, so that a number of representative sampling locations might be retained. To determine Lake Balaton’s different water quality areas (i.e. sub-areas of water body) 23 parameters (inorganic compounds) were examined from 10 sampling locations for the time interval 1985e2004 using clusterand discriminant analysis, and Wilks’ lambda distribution. With cluster analysis we were able to determine two time intervals (1985e1997 and 1998e2004) with three patterns of sub-areas, two from the first and one from the latter interval. These patterns pointed to the fact that for the whole investigated time interval (1985e2004) a total of five sub-areas were present, changing in number and alignment. Then the results were verified using discriminant analysis, and the parameters which influenced the sub-areas the most were determined using Wilks’ lambda distribution. The conclusion was that to be able to follow the changes in alignment of the sub-areas and to get a comprehensive picture of Lake Balaton, a minimum of five sampling locations should be retained, one in each sub-area. Based on this study the Water Authorities chose to keep five out of ten sampling locations so that the sub-areas could be described. We consider this a great success and the methodology as an example for setting up sub-areas in a water body. LA - English DB - MTMT ER - TY - JOUR AU - Kovács, József AU - Korponai, János AU - Kovácsné Székely, Ilona AU - Hatvani, István Gábor TI - Introducing sampling frequency estimation using variograms in water research with the example of nutrient loads in the Kis-Balaton Water Protection System (W Hungary) JF - ECOLOGICAL ENGINEERING J2 - ECOL ENG VL - 42 PY - 2012 SP - 237 EP - 243 PG - 7 SN - 0925-8574 DO - 10.1016/j.ecoleng.2012.02.004 UR - https://m2.mtmt.hu/api/publication/1895896 ID - 1895896 N1 - Megjegyzés-23003084 Megjegyzés-22322800 WC: Ecology; Engineering, Environmental; Environmental Sciences Megjegyzés-22244396 IF: 2.203 AB - In most of the world along with urbanization came the deterioration of surface waters. The case of Hungary's Lake Balaton (the largest shallow freshwater lake in Central Europe) and its catchment area was no exception. In the second part of the twentieth century it became clear that measures had to be taken to prevent further water quality deterioration. In order to do so, the Kis-Balaton Water Protection System (KBWPS) was established. To measure its effectiveness in filtering Lake Balaton's water input, total phosphorus and total nitrogen loads are regularly estimated. In this study the practice of temporal sampling frequency estimation is described using data series from the KBWPS in order to suggest a sampling frequency that is suitable for estimating annual nutrient loads and still produces a dataset from which environmental processes can be followed. In this case, temporal sampling frequency estimation was conducted using variogram analysis, before which trend removal was performed on four sampling sites and two daily sampled parameters for the years 1993–2007. Although the calculations were only carried out on two parameters they are applicable to other environmental parameters as well. Nutrient load estimation is used as a verification tool. The result of the variogram analysis pointed towards a three-day sampling frequency for the whole KBWPS in the case of total phosphorus and total nitrogen (if the purpose of the monitoring is nutrient estimation). This reduction in sampling frequency would make an approximately 50% cost reduction possible. The study gives an example of sampling frequency estimation which is a key question in every aspect of environmental science, so that hopefully it will be useful for scientists dealing with water protection issues. LA - English DB - MTMT ER - TY - CHAP AU - Hatvani, István Gábor AU - Kovács, József AU - Barcza, M AU - Kovácsné Székely, Ilona AU - Jakusch, P AU - Bernáth, Gy ED - Bunyevácz, J ED - Csonka, P ED - Fodor, István ED - Gálosi-Kovács, Bernadett TI - Adatelemző módszerek alkalmazásának feltételei és lehetőségei a felszíni és felszín alatti víz védelmében T2 - "A fenntartható fejlődés, valamint a környezet- és természetvédelem összefüggései a Kárpát-medencében" PB - MTA Pécsi Akadémiai Bizottság (MTA PAB) CY - Pécs SN - 9789637068102 PY - 2011 PG - 13 UR - https://m2.mtmt.hu/api/publication/1896004 ID - 1896004 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Hatvani, István Gábor AU - Kovács, József AU - Kovácsné Székely, Ilona AU - Jakusch, P AU - Korponai, János TI - Analysis of long-term water quality changes in the Kis-Balaton Water Protection System with time series-, cluster analysis and Wilks' lambda distribution JF - ECOLOGICAL ENGINEERING J2 - ECOL ENG VL - 37 PY - 2011 IS - 4 SP - 629 EP - 635 PG - 7 SN - 0925-8574 DO - 10.1016/j.ecoleng.2010.12.028 UR - https://m2.mtmt.hu/api/publication/1447161 ID - 1447161 N1 - Megjegyzés-21184236 in press Megjegyzés-26085272 Megjegyzés-21637455 Z9: 1 WC: Ecology; Engineering, Environmental; Environmental Sciences Megjegyzés-21692552 Z9: 1 LA - English DB - MTMT ER - TY - JOUR AU - Kovács, József AU - Hatvani, István Gábor AU - Korponai, János AU - Kovácsné Székely, Ilona TI - Morlet wavelet and autocorrelation analysis of long-term data series of the Kis-Balaton water protection system (KBWPS) JF - ECOLOGICAL ENGINEERING J2 - ECOL ENG VL - 36 PY - 2010 IS - 10 SP - 1469 EP - 1477 PG - 9 SN - 0925-8574 DO - 10.1016/j.ecoleng.2010.06.028 UR - https://m2.mtmt.hu/api/publication/1368044 ID - 1368044 N1 - Corrigendum In: ECOLOGICAL ENGINEERING (0925-8574 1872-6992): 37 9 pp 1438-1440 (2011) [1740343] AB - Lake Balaton is the largest shallow freshwater lake in Central Europe. Its water quality is mainly affected by the supplying rivers and other water sources. The primary source is the Zala River. The water of this river used to be filtered by the Kis-Balaton wetland (KBW) before entering Lake Balaton at Keszthely Bay. In the course of the nineteenth century, water level modifications at KBW shrank and it lost its full capacity to function as a filter for the Zala's waters, so the nutrient load of Lake Balaton greatly increased, and its water quality started to deteriorate. This is the reason an artificial extended wetland called the Kis-Balaton water protection system (KBWPS) had to be constructed-to retain the inorganic nutrients at the mouth of the Zala River and stop the further degradation of Balaton's water quality. In this study, Morlet wavelet spectrum (periodicity) analysis and autocorrelation (memory) analysis were used with weekly chemical, biological and physical data for the KBWPS for the period 1993-2007. We compared the periodicity and the memory of the parameters in the two different habitats of the KBWPS and the Zala River. We also analyzed the tracking capability of the periodical seasons of the two phases (the complete Phase I, and the incomplete Phase II) and the river. The results showed that the incomplete Phase II is unable to conserve the periodicity and sustain long memory because of the shading provided by the macrophyte cover and the extra inflows. In conclusion, we were able to point out the dependence of the system's processes on temperature and climate conditions with methods that have not yet been used for this kind of purpose. LA - English DB - MTMT ER - TY - JOUR AU - Nagyné Hajnal, Éva AU - Padisák, Judit TI - Analysis of long-term ecological status of Lake Balaton based on the ALMOBAL phytoplankton database JF - HYDROBIOLOGIA J2 - HYDROBIOLOGIA VL - 599 PY - 2008 SP - 227 EP - 237 PG - 11 SN - 0018-8158 DO - 10.1007/s10750-007-9207-x UR - https://m2.mtmt.hu/api/publication/1117954 ID - 1117954 N1 - Megjegyzés-21529093 Z9: 12 LA - English DB - MTMT ER - TY - JOUR AU - Istvánovics, Vera AU - Clement, Adrienne AU - Somlyódy, László AU - Specziár, András AU - G.-Tóth, László AU - Padisák, Judit TI - Updating water quality targets for shallow Lake Balaton (Hungary), recovering from eutrophication. JF - HYDROBIOLOGIA J2 - HYDROBIOLOGIA VL - 581 PY - 2007 IS - 1 SP - 305 EP - 318 PG - 14 SN - 0018-8158 DO - 10.1007/s10750-006-0509-1 UR - https://m2.mtmt.hu/api/publication/1076779 ID - 1076779 AB - The paper presents an overview about recovery of shallow Lake Balaton from eutrophication by assessing quantitative and qualitative changes in phytoplankton, zooplankton, and chironomids as a function of load reduction. The aim was to update the present water quality targets. The proposed targeting scheme supplements the existing one with a range of lake-specific ecological criteria. We conclude that simple targets (desired phytoplankton biomass and permissible load) are the best choice during the initial stage of eutrophication management, but more complex schemes including ecological criteria are needed to trace recovery when re-organization of the ecosystem takes place. LA - English DB - MTMT ER - TY - JOUR AU - Padisák, Judit AU - Grigorszky, István AU - Borics, Gábor AU - Soróczki-Pintér, Éva TI - Use of phytoplankton assemblages for monitoring ecological status of lakes within the Water Framework Directive: the assemblage index. JF - HYDROBIOLOGIA J2 - HYDROBIOLOGIA VL - 553 PY - 2006 IS - 1 SP - 1 EP - 14 PG - 14 SN - 0018-8158 DO - 10.1007/s10750-005-1393-9 UR - https://m2.mtmt.hu/api/publication/1014453 ID - 1014453 LA - English DB - MTMT ER - TY - JOUR AU - Padisák, Judit TI - Cylindrospermopsis raciborskii (Woloszynska) Seenayya et Subba Raju, an expanding, highly adaptive cyanobacterium: worldwide distribution and review of its ecology. JF - ARCHIV FÜR HYDROBIOLOGIE SUPPLEMENTBAND MONOGRAPHISCHE BEITRAGE J2 - ARCH HYDROBIOL SUPPL MONOGR BEITR VL - 107 PY - 1997 IS - 4 SP - 563 EP - 593 PG - 31 SN - 0341-2881 UR - https://m2.mtmt.hu/api/publication/1014071 ID - 1014071 LA - English DB - MTMT ER -