Critically Assessment of Groundwater Quality Based on WQI and Its Vulnerability to Saltwater Intrusion in a Coastal City, Iran

Critically Assessment of Groundwater Quality Based on WQI and Its Vulnerability to Saltwater Intrusion in a Coastal City, Iran

Groundwater contamination, then, has become an acute concern that would intensify to a point of no return if thrust aside. The aim of this paper was to determine the groundwater quality in Behshahr (Iran) on the basis of the Water Quality Index (WQI). To research physico-chemical parameters such as pH, hardness, chloride (Cl), electrical conductivity (EC) and total dissolved solids, sixteen water samples from this coastal aquifer were collected and analyzed (TDS). The findings showed that, due to anthropogenic activities, the annual average value of TDS increased by 343 mg/l between 1999 and 2015. It was concluded, according to WQI, that the quality of groundwater declined over the last sixteen years, so that the percentage of samples classified as “good water” decreased by 18.5 percent and, on the other hand, unfortunately, the percentage of quality of “poor water” increased by almost 12.5 percent. Correspondence with the chloride-bicarbonate ratio of the WQI distribution diagram attests to the major contribution of saltwater intrusion to the deterioration in groundwater quality in this region. A detailed interpretation of the quality of water in a basin is provided by this easy but precise procedure. Its high-weight chloride sensitivity makes it a good indicator for finding the saltwater intrusion threshold in this field of research.

Author (s) Details

Salman Tavassoli
Faculty of Civil Engineering, K. N. Toosi University of Technology, Tehran, Iran.

Farzad Mohammadi
Faculty of Civil Engineering, K. N. Toosi University of Technology, Tehran, Iran.

View Book :- https://stm.bookpi.org/MAGEES-V2/issue/view/1

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