@inproceedings{MTMT:34110532,
	title = {Folyók morfológiai változásának vizsgálata a Dráva példáján keresztül},
	url = {https://m2.mtmt.hu/api/publication/34110532},
	author = {Ficsor, Johanna and Gradwohl-Valkay, Alexandra Ilona},
	booktitle = {Tájökológiai kihívások, adaptációs lehetőségek},
	unique-id = {34110532},
	abstract = {A folyók, mint az egyik legdinamikusabban változó élettér, folyamatainak ismerete nagyon fontos a velük való gazdálkodás helyes módja és annak megtervezése szempontjából. A morfológiai folyamatok, jelenségek ismerete ezek között is kiemelten fontos. Jelen cikkben összegyűjtöttük azokat a fontos összefüggéseket, amelyek relevánsak ebben a tekintetben. A kapott eredményeket, egy példán keresztül, a Dráva horvát – magyar közös szakaszára vonatkozó vizsgálat eredményei alapján mutatjuk be. A Drávára bemutatott eredmények jól szemléltetik, hogy egy alluviális folyószakasz morfológiai változása milyen intenzív lehet. Ez az intenzív változás jelentős hatással van a következő időszak ökoszisztéma-szolgáltatásainak esetleges változására is, ezért ennek ismerete és nyomon követése fontos vízgazdálkodási feladat.},
	year = {2022},
	pages = {127-132},
	orcid-numbers = {Ficsor, Johanna/0000-0001-9439-516X}
}

@article{MTMT:33202808,
	title = {Generation of a flood susceptibility map of evenly weighted conditioning factors for Hungary},
	url = {https://m2.mtmt.hu/api/publication/33202808},
	author = {Sarkadi, Noémi and Pirkhoffer, Ervin and Lóczy, Dénes and Balatonyi, László and Geresdi, István and Fábián, Szabolcs Ákos and Varga, Gábor and Balogh, Richárd and Gradwohl-Valkay, Alexandra Ilona and Halmai, Ákos and Czigány, Szabolcs},
	doi = {10.5937/gp26-38969},
	journal-iso = {GEOGRAPHICA PANNONICA},
	journal = {GEOGRAPHICA PANNONICA},
	volume = {26},
	unique-id = {33202808},
	issn = {0354-8724},
	abstract = {Over the past decades, in the mountainous, hilly and/or urban areas of Hungary several high-intensity storms were followed by severe flash flooding and other hydrologic consequences. The overall aim of this paper was to upgrade the national flash flood susceptibility map of Hungary first published by Czigány et al. (2011). One elementary watershed level (FFSIws) and three settlement level flash flood susceptibility maps (FFSIs) were constructed using 13 environmental factors that influence flash flood generation. FFSI maps were verified by 2,677 documented flash flood events. In total, 5,458 watersheds were delineated. Almost exactly 10% of all delineated watersheds were included into the category of extreme susceptibility. While the number of the mean-based FFSIs demonstrated a normal quasi-Gaussian distribution with very low percentages in the quintile of low and extreme categories, the maximum-based FFSIs overemphasized the proportion of settlements of high and extreme susceptibility. These two categories combined accounted for more than 50% of all settlements. The highest accuracy at 59.02% for class 5 (highest susceptibility) was found for the majority based FFSIs. The current map has been improved compared to the former one in terms of (i) a higher number of conditional factors considered, (ii) higher resolution, (iii) being settlement-based and (iv) a higher number of events used for verification.},
	year = {2022},
	eissn = {1820-7138},
	pages = {200-214},
	orcid-numbers = {Sarkadi, Noémi/0000-0002-2370-8621; Pirkhoffer, Ervin/0000-0003-2917-3290; Lóczy, Dénes/0000-0002-2542-6775; Balatonyi, László/0000-0001-5130-730X; Geresdi, István/0000-0002-3160-7900; Fábián, Szabolcs Ákos/0000-0001-9127-2113; Halmai, Ákos/0000-0001-5722-8119; Czigány, Szabolcs/0000-0002-9158-3162}
}

@inproceedings{MTMT:33074968,
	title = {What is the Current Morphological State of the River Drava},
	url = {https://m2.mtmt.hu/api/publication/33074968},
	author = {Ficsor, Johanna and Gradwohl-Valkay, Alexandra Ilona and Pirkhoffer, Ervin and Czigány, Szabolcs},
	booktitle = {From snow to sea: Proceedings of the 39th IAHR World Congress},
	doi = {10.3850/IAHR-39WC2521711920221830},
	unique-id = {33074968},
	year = {2022},
	pages = {795-800},
	orcid-numbers = {Ficsor, Johanna/0000-0001-9439-516X; Czigány, Szabolcs/0000-0002-9158-3162}
}

@{MTMT:32615500,
	title = {A MORPHOLOGICAL EXAMINATION OF THE DRAVA RIVER},
	url = {https://m2.mtmt.hu/api/publication/32615500},
	isbn = {9789633344149},
	author = {Ficsor, Johanna and Gradwohl-Valkay, Alexandra Ilona and Pirkhoffer, Ervin and Czigány, Szabolcs},
	booktitle = {HydroCarpath-2021 Catchment and River Processes in Regional Hydrology: Coupling Field Experiments and Data Assimilation into Process Understanding and Modelling in Carpathian Basins},
	doi = {10.35511/978-963-334-414-9},
	unique-id = {32615500},
	year = {2021},
	pages = {13-13},
	orcid-numbers = {Ficsor, Johanna/0000-0001-9439-516X; Czigány, Szabolcs/0000-0002-9158-3162}
}

@inproceedings{MTMT:32492431,
	title = {A Dráva morfológiai változásainak térinformatikai vizsgálata},
	url = {https://m2.mtmt.hu/api/publication/32492431},
	author = {Gradwohl-Valkay, Alexandra Ilona and Ficsor, Johanna and Halmai, Ákos and Nagyváradi, László and Kiss, Kinga and Czigány, Szabolcs and Pirkhoffer, Ervin and Liptay, Zoltán Árpád and Balogh, Richárd},
	booktitle = {Az elmélet és a gyakorlat találkozása a térinformatikában XII.: Theory meets practice in GIS},
	unique-id = {32492431},
	abstract = {Implementing nature conservation and landscape management requires the up-to-date
		knowledge of the changes in river morphometry and bedload dynamics. Hence, we aimed at comparing
		mapping the positions of the 2013 and the 2019 centrelines and the actual bathymetry of the Drava River
		between its confluence with the Mura River (rkm 2018) and the community of Drávaszabolcs (rkm 75).
		We found significant differences in the positions of the two centrelines upstream of the town of Barcs.
		Downstream of Barcs, however, the two centrelines almost entirely coincide. The adverse behaviour of
		the Drava in its Hungarian reach is explained by the anthropogenic influence in the downstream reach
		and the more natural character of the river upstream of Barcs.},
	year = {2021},
	pages = {99-104},
	orcid-numbers = {Ficsor, Johanna/0000-0001-9439-516X; Halmai, Ákos/0000-0001-5722-8119; Czigány, Szabolcs/0000-0002-9158-3162; Liptay, Zoltán Árpád/0000-0001-8984-9366}
}

@article{MTMT:31940975,
	title = {Bedload entrainment dynamics in a partially channelized river with mixed bedload: A case study of the Drava River, Hungary},
	url = {https://m2.mtmt.hu/api/publication/31940975},
	author = {Pirkhoffer, Ervin and Halmai, Ákos and Ficsor, Johanna and Gradwohl-Valkay, Alexandra Ilona and Lóczy, Dénes and Nagy, Ádám and Liptay, Zoltán Árpád and Czigány, Szabolcs},
	doi = {10.1002/rra.3794},
	journal-iso = {RIVER RES APPL},
	journal = {RIVER RESEARCH AND APPLICATIONS},
	volume = {2021},
	unique-id = {31940975},
	issn = {1535-1459},
	abstract = {The morphodynamics of alluvial rivers is controlled by the mobilization of bed material. However, the details of mobilization of mixed-texture bed materials at low flows, increasingly common due to climate change, are still unclear. The 161-km-long Hungarian alluvial reach of the Drava River, downstream of sections where flow characteristics have been heavily modified by human interference, was investigated in 2019. A monitoring campaign at cross-sections, on average 5.55 km apart, was launched to study channel morphology, bedload entrainment dynamics with regard to texture. For the survey, a sonar, an ADCP and a Helley–Smith bedload sampler mounted on a double-hull vessel was used. Our research pointed out an abrupt fining between river kms (hereafter: rkm) 175 and 170 (distance from the mouth), probably due to reduced armouring. The d60 fraction was found to be finer than in 2003 and 2012 for the upstream stations of Botovo and Bélavár, and showed a good correspondence with the records of the Barcs and Drávaszabolcs stations. Temporal fining and higher entrainment rate are due to (a) changing climate of the catchment, that is, diminishing flow between the monitoring dates (2003, 2012 and 2019); (b) reduced armouring, (c) variability of cross-sectional position of sampling points and (d) the different mesh size of the bedload samplers employed. Calculations of shear velocity, Reynolds and Shields numbers indicate more dynamic sediment motion than observed by previous studies. Our reach-scale results may be relevant for the alluvial sections of other alpine and subalpine, partially channelized rivers of similar size, flow dynamics and mixed bedload.},
	keywords = {Hydromorphology; Drava River; armouring; bedload entrainment; bedload texture; regulated river},
	year = {2021},
	eissn = {1535-1467},
	pages = {699-711},
	orcid-numbers = {Pirkhoffer, Ervin/0000-0003-2917-3290; Halmai, Ákos/0000-0001-5722-8119; Ficsor, Johanna/0000-0001-9439-516X; Lóczy, Dénes/0000-0002-2542-6775; Liptay, Zoltán Árpád/0000-0001-8984-9366; Czigány, Szabolcs/0000-0002-9158-3162}
}

@article{MTMT:31871037,
	title = {The influence of changes in flow regime caused by dam closure on channel planform evolution: insights from flume experiments},
	url = {https://m2.mtmt.hu/api/publication/31871037},
	author = {Słowik, Marcin and Kiss, Kinga and Czigány, Szabolcs and Gradwohl-Valkay, Alexandra Ilona and Dezső, József and Halmai, Ákos and Marciniak, Adam and Tritt, Remigiusz and Pirkhoffer, Ervin},
	doi = {10.1007/s12665-021-09437-5},
	journal-iso = {ENVIRON EARTH SCI},
	journal = {ENVIRONMENTAL EARTH SCIENCES},
	volume = {80},
	unique-id = {31871037},
	issn = {1866-6280},
	year = {2021},
	eissn = {1866-6299},
	orcid-numbers = {Kiss, Kinga/0000-0001-6011-8690; Czigány, Szabolcs/0000-0002-9158-3162; Halmai, Ákos/0000-0001-5722-8119; Pirkhoffer, Ervin/0000-0003-2917-3290}
}

@inproceedings{MTMT:32492811,
	title = {A Dráva hordalékviszonyainak térinformatikai vizsgálata},
	url = {https://m2.mtmt.hu/api/publication/32492811},
	author = {Ficsor, Johanna and Halmai, Ákos and Nagyváradi, László and Kiss, Kinga and Czigány, Szabolcs and Pirkhoffer, Ervin and Liptay, Zoltán Árpád and Balogh, Richárd and Gradwohl-Valkay, Alexandra Ilona},
	booktitle = {Az elmélet és a gyakorlat találkozása a térinformatikában XI.: Theory meets practice in GIS},
	unique-id = {32492811},
	abstract = {In our research we made a unique survey of the Hungarian reach of the Drava River, from 236 + 000 river kilometers, from the Mura mouth to the 74 + 000 river kilometers below Drávaszabolcs, for the better understanding of bedload transport using a sonar and flow measurements with ADCP and sediment sampling were carried out at 10 km intervals with van Dorn and Helley-Smith sampler. The long-term goals of nature conservation and landscape management necessitate this kind of unique research of the river and the knowledge of possible changes in the river bedload.},
	year = {2020},
	pages = {85-91},
	orcid-numbers = {Ficsor, Johanna/0000-0001-9439-516X; Halmai, Ákos/0000-0001-5722-8119; Czigány, Szabolcs/0000-0002-9158-3162; Liptay, Zoltán Árpád/0000-0001-8984-9366}
}

@inproceedings{MTMT:32252718,
	title = {Comprehensive morphodynamical analysis of the Drava River},
	url = {https://m2.mtmt.hu/api/publication/32252718},
	author = {Liptay, Zoltán Árpád and Halmai, Ákos and Pirkhoffer, Ervin and Czigány, Szabolcs and Gradwohl-Valkay, Alexandra Ilona and Ficsor, Johanna},
	booktitle = {Online proceedings of the papers submitted to the 2020 TELEMAC-MASCARET User Conference},
	unique-id = {32252718},
	year = {2020},
	pages = {53-60},
	orcid-numbers = {Liptay, Zoltán Árpád/0000-0001-8984-9366; Halmai, Ákos/0000-0001-5722-8119; Czigány, Szabolcs/0000-0002-9158-3162; Ficsor, Johanna/0000-0001-9439-516X}
}

@article{MTMT:31208678,
	title = {Applicability of a Recreational-Grade Interferometric Sonar for the Bathymetric Survey and Monitoring of the Drava River},
	url = {https://m2.mtmt.hu/api/publication/31208678},
	author = {Halmai, Ákos and Gradwohl-Valkay, Alexandra Ilona and Czigány, Szabolcs and Ficsor, Johanna and Liptay, Zoltán Árpád and Kiss, Kinga and Lóczy, Dénes and Pirkhoffer, Ervin},
	doi = {10.3390/ijgi9030149},
	journal-iso = {ISPRS INT J GEO-INFORMATION},
	journal = {ISPRS INTERNATIONAL JOURNAL OF GEO-INFORMATION},
	volume = {9},
	unique-id = {31208678},
	abstract = {Sonar survey of shallow water bodies has challenged scientists for a long time. Although these water courses are small, still they have an increasing ecological, touristic and economical role. As maritime sonars are non-ideal tools for shallow waters, the bathymetric survey of these rivers has been taken with cross-sectional methods. Due to recent developments, interferometric surveying technology have also burst into the market of recreational-grade fish-finders. The objective of the current study was the development of a novel, complex and integrated surveying technique which is affordable, robust and applicable even at low water levels. A recreational-grade sonar system was assembled and mounted on a double-hull vessel and connected with a geodetic Global Navigation Satellite System (GNSS) device. We have developed a novel software which enables the bridging between a closed sonar file format and the commonly used Geographic Information System (GIS) datasets. As a result, the several month-long conventional bathymetric survey of the 146 km-long reach of the Drava River was reduced to 20 days and provided channel bathymetry of many orders of magnitude higher than the classical methods. Additionally, a large number of spatial derivatives were generated which enables the analysis of channel morphology, textural variation of channel sediments and the accurate delineation of navigational routes.},
	keywords = {Interferometry; bathymetry; sonar measurements; Dráva basin; recreational fishing; active remote sensing},
	year = {2020},
	eissn = {2220-9964},
	pages = {149-170},
	orcid-numbers = {Halmai, Ákos/0000-0001-5722-8119; Czigány, Szabolcs/0000-0002-9158-3162; Ficsor, Johanna/0000-0001-9439-516X; Liptay, Zoltán Árpád/0000-0001-8984-9366; Lóczy, Dénes/0000-0002-2542-6775; Pirkhoffer, Ervin/0000-0003-2917-3290}
}