Evolution of groundwater quality assessment on urban area- a bibliometric analysis

Assessment of natural resources is an emerging concept in the research field. Groundwater is a seriously vulnerable natural resource in urban area. Research related to the analysis of groundwater quality in urban areas is relatively new to the research field. In this paper, a comprehensive review has been conducted to understand the research trend. This research paper focuses on the contemporary timespan (1990-2022) with 709 articles to understand the progress on urban groundwater quality analysis. Bibliometric analysis has been performed in this paper to incorporate a large volume of papers related to the study. The most promising citation database Scopus has been used to collect article related metadata. The process was executed with help of 'bibliometrix' package on the R programming language. The results were visualised with 'biblioshiny' and 'VOSviwer'. The outcome of the study suggests that research articles related to groundwater quality analysis on urban area is increasing year per year. Researchers from different fields and countries are collaborating for an integrated outcome. Ground-water vulnerability, groundwater quality assessment, the source of pollutants in groundwater, groundwater contamination, the presence of hazardous materials in groundwater are evolving topics for the last three decades. The trends in these topics show the application of spatial data science, remote sensing, statistical algorithms in groundwater quality analysis for urban area. This paper will inspire the researchers to understand the situation about groundwater quality, articles related to it, authors involved to this subject and most useable methods for analysis and future scope in this research field.