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001-es BibID:	BIBFORM125592
035-os BibID:	(Scopus)85210256740 (WoS)001366296100001
Első szerző:	Balla Dániel Zoltán (geográfus)
Cím:	Spatiotemporal Dynamics of Water Quality : long-Term Assessment Using Water Quality Indices and GIS / Balla Dániel, Kiss Emőke, Zichar Marianna, Mester Tamás
Dátum:	2024
ISSN:	2220-9964
Megjegyzések:	The severe contamination of groundwater supplies in rural areas is a global problem that requires strict environmental measures. Related to this, one of the most important challenges at present is the elimination of local sources of pollution. Therefore, this research examined the local water quality changes following the construction of the sewerage network, under the framework of long-term monitoring (2011-2022) in Báránd, Hungary, using water quality indices and GIS (Geographic Information System) techniques. In order to understand the purification processes and spatial and temporal changes, three periods were determined: the pre-sewerage period (2011-2014), the transitional period (2015-2018), and the post-sewerage period (2019-2022). Forty monitoring wells were included in the study, ensuring complete coverage of the municipality. The results revealed a high level of pollution in the area in the pre-sewerage period. Based on the calculated indices, an average of 80% of the wells were ranked in categories 4-5, indicating poor water quality, while less than 8% were classified in categories 1-2, indicating good water quality. No significant purification process was detected in the transitional period. However, marked changes were observed in the post-sewerage period as a result of the elimination of local sources of pollution. In the post-sewerage period, the number of monitoring wells ranked as excellent and good increased significantly. Additionally, the number of wells assigned to category 5 decreased markedly, compared to the reference period. The significant difference between the three periods was confirmed by the Wilcoxon test as well (p < 0.05). Based on interpolated maps, it was found that, in the post-sewerage period, an increasing section of the settlement had good or excellent water quality. In addition to an assessment of long-term tendencies, the annual fluctuations in the water quality of the wells were also examined. This showed that the purification processes do not occur in a linear pattern but are influenced by various factors (e.g., precipitation). Our results highlight the importance of protecting and improving groundwater resources in municipal areas and the relevance of long-term monitoring of water adequate management policy.
Tárgyszavak:	Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk water quality index groundwater contamination geostatistical analysis sewerage network GIS
Megjelenés:	ISPRS International Journal of Geo-Information. - 13 : 11 (2024), p. 1-18. -
További szerzők:	Kiss Emőke (1993-) (geográfus) Bodroginé Zichar Marianna (1971-) (informatikus, matematikus) Mester Tamás (1991-) (geográfus, földrajz-német tanár)
Pályázati támogatás:	EKÖP-24-4-II-DE-89 Egyéb University of Debrecen Scientific Research Bridging Fund (DETKA) Egyéb
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001-es BibID:	BIBFORM100098
035-os BibID:	(WoS)000767292300001 (Scopus)85124124114
Első szerző:	Balla Dániel Zoltán (geográfus)
Cím:	Possibilities for Assessment and Geovisualization of Spatial and Temporal Water Quality Data Using a WebGIS Application / Dániel Balla, Marianna Zichar, Emőke Kiss, György Szabó, Tamás Mester
Dátum:	2022
ISSN:	2220-9964
Tárgyszavak:	Természettudományok Földtudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	ISPRS International Journal of Geo-Information. - 11 : 2 (2022), p. 1-18. -
További szerzők:	Bodroginé Zichar Marianna (1971-) (informatikus, matematikus) Kiss Emőke (1993-) (geográfus) Szabó György (1964-) (geográfus, egyetemi tanár) Mester Tamás (1991-) (geográfus, földrajz-német tanár)
Pályázati támogatás:	ÚNKP-21-4-II Egyéb
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001-es BibID:	BIBFORM131046
Első szerző:	Tóth Róbert (informatikus)
Cím:	Interactive Visualization for the GTFS and GTFS-RT Data of Budapest / Tóth Róbert, Ispány Márton, Zichar Marianna
Dátum:	2025
ISSN:	2220-9964
Megjegyzések:	Various platforms, such as Google Maps, provide information about the services of public transport companies worldwide. Operators publish the planned (static) timetable using the General Transit Feed Specification (GTFS) format, while the GTFS Realtime (GTFS-RT) specification provides live (dynamic) information about the services. In this paper, we present our dataset that was built by retrieving and pre-processing the data sources of the open data platform of BKK Futár, hosted by the Centre for Budapest Transport Company (BKK). The paper contains a well-detailed description of our methods for retrieving and pre-processing the data among statistical features. The dataset covers a one-year period in which the data collection mechanism used for realtime data was continuously improved from collecting only live vehicle positions to covering all the available feeds and increasing the query frequency. We merged the static data with the vehicle positions to filter them, yielding a clean set of tracked trips. As a result, more than 90% of the daily planned trips could be reconstructed from the responses. We provide an interactive web-based visualization for the analysis of the GTFS schedule's, and the GTFS-RT Vehicle Positions feed's, geospatial features. The dataset and also our methodology can serve as input for various research studies to investigate the common characteristics of delays and disruptions or predict real departure times based on the current vehicle positions and historical data.
Tárgyszavak:	Informatikai tudományok Műszaki tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk public transport geospatial data historical data pre-processing reconstruction GTFS GTFS-RT visualization Leaflet
Megjelenés:	ISPRS International Journal of Geo-Information. - 14 : 7 (2025), p. 1-24. -
További szerzők:	Ispány Márton (1966-) (informatikus, matematikus) Bodroginé Zichar Marianna (1971-) (informatikus, matematikus)
Pályázati támogatás:	EKÖP-24-4 Egyéb
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