Evaluation of groundwater quality in the rural environment using geostatistical analysis and WebGIS methods in a Hungarian settlement, Báránd

Balla, Dániel; Kiss, Emőke; Zichar, Marianna; Mester, Tamás

doi:10.1007/s11356-023-28627-1

Cited by 3 publications

(1 citation statement)

References 62 publications

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“…A víz minőségével kapcsolatos nemzeti és nemzetközi adatbázisok WMS-alapú (Web Map Service) adatszolgáltatása kiemelten fontos az oktatási, kutatási és az ipari szektorok számára egyaránt. A jelenlegi technológiai irányoknak megfelelően jellemzően a felhőalapú webes monitoring és döntéstámogató rendszerek biztosítják ezen adatbázisok tér-és időbeli adatainak elérését, valós időben történő elemzésének lehetőségét (Simó 2017, Balla et al 2023, Jarkas 2023. A téradatok webes publikálása ebből kifolyólag olyan infokommunikációs interfészekre helyeződött át, ahol elsődleges szempont a könnyen használható és értelmezhető "térképalapú" lekérdező felület (Jiang-Li 2005, Farkas 2017).…”

Section: Bevezetésunclassified

Vízminőségi monitoringadatok feldolgozása és publikálása WebGIS-támogatással

Balla,

Kiss,

Zichar

et al. 2023

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Absztrakt: A monitoring adatokon alapuló vízminőséget leíró kvalitatív értékelés legfontosabb feladata a vízminőség állapotára vonatkozó információk értelmezése. A vízminőségi indexek tehát olyan eszközök, amelyek nagymértékben minimalizálják az adatmennyiséget, és egyszerűsítik a vízminőségi állapot kifejezését. Tanulmányunk vízminőségi mutatók (Water Quality Index, CCME Water Quality Index, Degree of Conatamination Index) bevonásával olyan -alapú interaktív analitikai eszközt mutat be, amelyet szabadon elérhetővé és felhasználhatóvá tettünk közösségi használatra. A nyers mérési adatok térinformatikai feldolgozásával kapcsolatban azonban meg kell említenünk a hagyományos GIS-alapú rendszerek paradigmaváltását. A felhőalapú -rendszerek ma már nem csak a geoadatbázisok kezelését végzik, de feladatorientált modulok integrálásával komplex feladatok (pl.: adatstruktúra definiálása, bemeneti adatok minőségellenőrzése és validációja, webes adatvizualizáció) valós idejű megvalósítására is képesek. Ennek egyik legfontosabb hozadéka, hogy nincs szükség további platformon vagy szoftverkörnyezetben az adatok utófeldolgozására. A WebGIS-architektúrákkal foglalkozó kutatások egyetértenek abban, hogy a felhőalapú technológiák mellett a mesterséges intelligencia és a neurális hálózatok jelenléte hosszú távon megkerülhetetlen lesz a téradatalapú innovatív fejlesztésekben.

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Section: Bevezetésunclassified

Vízminőségi monitoringadatok feldolgozása és publikálása WebGIS-támogatással

Balla,

Kiss,

Zichar

et al. 2023

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Long-term spatiotemporal changes in nitrate contamination of municipal groundwater resources after sewerage network construction in the Hungarian Great Plain

Mester,

Szabó,

Kiss

et al. 2024

Environ Sci Pollut Res

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Over the last decades, as a consequence of wastewater discharges and other anthropogenic sources, severe nitrate (NO3−) pollution has developed in municipal environment causing global concern. Thus, eliminating the potential sources of pollution is one of the major challenges of the twenty-first century, whereby sanitation services are essential for ensuring public health and environmental protection. In the present study, long-term monitoring (2011–2022) of shallow groundwater NO3− contamination in municipal environment was carried following the construction of the sewerage network (2014) in the light of the pre-sewerage situation. Our primary aim was to assess the long-term effects of sewerage on nitrate NO3− levels in the shallow groundwater and evaluate the efficiency of these sanitation measures over time. Based on the results, significant pollution of the shallow groundwater in the municipality was identified. During the pre-sewer period, NO3− concentrations exceeded the 50 mg/L limit in the majority of monitoring wells significantly, upper quartile values ranged between 341 and 623 mg/L respectively. Using Nitrate Pollution Index (NPI) and interpolated NO3− pollution maps, marked spatial north–south differences were detected. In order to verify the presence of wastewater discharges in the monitoring wells, the isotopic ratio shifts (δ) for 18O and D(2H) were determined, confirming municipal wastewater effluent. Variations in NO3−/Cl− molar ratios suggest also contamination from anthropogenic sources, including septic tank effluent from households and the extensive use of manure. Data series of 7 years (2015–2022) after the investment indicate marked positive changes by the appearance of decreasing trends in NO3− values confirmed by Wilcoxon signed rank test and ANOVA. By comparing the pre- and post-sewerage conditions, the mean NO3− value decreased from 289.7 to 175.6 mg/L, with an increasing number of monitoring wells with concentrations below the limit. Our results emphasise the critical role of sanitation investments, while also indicating that the decontamination processes occur at a notably slow pace. Detailed, long-term monitoring is therefore essential to ensure accurate follow-up of the ongoing changes. The results can provide information for local citizens and authorities to improve groundwater management tools in the region.

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Spatiotemporal Dynamics of Water Quality: Long-Term Assessment Using Water Quality Indices and GIS

Balla,

Kiss,

Zichar

et al. 2024

IJGI

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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.

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Evaluation of groundwater quality in the rural environment using geostatistical analysis and WebGIS methods in a Hungarian settlement, Báránd

Cited by 3 publications

References 62 publications

Vízminőségi monitoringadatok feldolgozása és publikálása WebGIS-támogatással

Vízminőségi monitoringadatok feldolgozása és publikálása WebGIS-támogatással

Long-term spatiotemporal changes in nitrate contamination of municipal groundwater resources after sewerage network construction in the Hungarian Great Plain

Spatiotemporal Dynamics of Water Quality: Long-Term Assessment Using Water Quality Indices and GIS

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