Hydrochemical Characteristics and Groundwater Quality Assessment in the Diluvial Fan of Gaoqiao, Emei Mountain, China

Abstract

Methods for groundwater quality and pollution assessment are applied extensively, but it is difficult to determine a unified evaluation model. On the basis of hydrogeochemical characteristics analysis in 2016 compared with that in 1995, the five-element connection number SPA (set pair analysis) method was applied to evaluate the groundwater quality of the Gaoqiao diluvial fan under the influence of hydrogeological conditions and human activities along the flow path in our work. Descriptive statistics methods, Piper diagram, and a Schoeller diagram were also used to analyze the hydrochemical characteristics of groundwater such as chemical components, total dissolved solid, and total hardness. The change of the typical pollutant of fluorine was analyzed to evaluate the groundwater quality under the influence of human activities. The results showed that the groundwater quality in the study area was more in rank П. The basic hydrochemical types of shallow groundwater were HCO3-Ca·Mg and HCO3·SO4-Ca·Mg. The influencing factors of the hydrochemical component of groundwater were identified in the Gaoqiao diluvial fan. The quality of groundwater changed slightly from the top to the edge of the fan due to the water–rock interaction except for in Yucun and Hucun influenced by human activities. The assessment result can provide a scientific basis for the pollution prevention and changing process control of the groundwater in the hydrogeological unit of the Gaoqiao diluvial fan.

Eco-friendly and efficient monitoring of physico-chemical parameters of some mineral water from Slanic Moldova (Romania) during storage in different conditions – a case study

“…A modified Schoeller-Berkalo diagram was carried out allowing visualizing the changing trend of the chemical composition in water samples from the study area. This type of chart is often used in similar analyses [12,54].…”

Methodology for the Optimization of Groundwater Quality Monitoring Networks Oriented to Satisfy a Specific Spatial Coverage

“…Considering the importance of groundwater, it is necessary to know, in detail, the spatial distribution of the groundwater flow systems and its physical-chemical characteristics to improve its management (Esquivel et al, 2015;Kim et al, 2007). It is relevant to assure sustainable levels of groundwater quality when it is used for water supply (Yang et al, 2018). The implementation of groundwater quality monitoring programs is of paramount importance; for instance, it was detected that in almost 15% of the monitoring stations in Europe, the standard for nitrates in drinking water established by the World Health Organization (WHO) was exceeded (WWAP, 2018).…”