Possibilities for Assessment and Geovisualization of Spatial and Temporal Water Quality Data Using a WebGIS Application

Abstract

The provision of webGIS-based water quality data services has become a priority area for both the public and administrative sectors in the context of the pandemic emergency associated with the global spread of COVID-19. Current geographic, monitoring and decision supporting systems, typically based on web-based geospatial information, greatly facilitate the sharing of spatial and temporal data from environmental databases and real-time analyses. In the present study, different water quality indices are determined, compared and geovisualized, during which the changes in the quality of the shallow groundwater resources of a settlement are examined in the period (2011–2019) in an eastern Hungarian settlement. Another objective of the research is to determine three water quality indices (Water Quality Index, CCME Water Quality Index, Contamination degree) and categorize water samples based on the same input spatial and temporal data using self-developed freely available geovisualization tools. Groundwater quality was assessed by using different water quality indices. Significant pollution of the groundwater in the time period before the installation of a sewage network was shown. Regarding water quality, significant positive changes were shown based on all three water quality indices in the years after installing a sewage network (2015–2019). The presence of pollution apart from the positive changes suggests that the purification processes will last for a long time.

Vízminőségi monitoringadatok feldolgozása és publikálása WebGIS-támogatással

“…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). A digitalizáció térnyerése technológiai generációváltást eredményezett, melyet a szakirodalom "térinformatikai forradalom"-nak nevez (Farkas, 2017, Balla et al 2022.…”

Geovisualization: A Practical Approach for COVID-19 Spatial Analysis

“…Zhou et al [23] used geovisualization to investigate behaviors among public transport users before and after events related to COVID-19. Balla et al [24] created a WebGIS to visualize spatial and temporal information on water quality to provide public services during the pandemic. Ponjavic et al [25] developed a WebGIS to monitor the effectiveness of control measures in preventing the spread of COVID-19.…”

Geospatial Analysis in Web Browsers—Comparison Study on WebGIS Process-Based Applications

“…Geographic and geoinformatic analyses are now common practices in the desktop environment, and they are used routinely. Similarly, web mapping applications have become so established that they are now part of the daily habits of millions of users [6] on a global, national and regional level within numerous settings [7][8][9][10]. The next step reflecting the evolution of WebGIS (such as the combination of GIS within the web platform) is the implementation of spatial features and advanced analysis directly into online map libraries [11].…”