Groundwater Quality Assessment in Haraz Alluvial Fan, Iran

Evaluation of groundwater quality is an important issue to assure from its safe and stable use. However, describing quality conditions is generally difficult considering spatial variability of pollutants and a wide range of indicators (biological, physical and chemical substances) which can be measured. In this research, groundwater quality of Haraz alluvial fan located in southern part of Caspian Sea has been investigated using Piper, Scholler, Wilcox and GQI methods. Piper diagram (a graphical representation of a water sample chemistry) results showed that groundwater type and facies of Calcium bicarbonate in 29 wells and sodium bicarbonate in 2 wells. Scholler diagram shows moderate to acceptable quality of water and with Wilcox method it has been determined that all water samples (100%) are in C3S1 Class that Indicate high water quality. Investigation of water samples with GQI method also showed that the study area in terms of the indicator is in range of moderate to good quality (71.83 – 82.26).