An Assessment of the Groundwater Quality Using the AqQA Model and Determination of the Most Suitable Method for Their Zoning (Case Study: Rafsanjan City, The Province of Kerman)

Subject Areas : Water and Environment

Ali Neshat ¹ , razieh gholamrazai ²

1 - Associate Professor, Irrigation and Drainage Department Kerman Branch, Islamic Azad University, Kerman, Iran. *(Corresponding Author)
2 - M.SC. Irrigation & Drainage, Islamic Azad University, Kerman Branch Kerman, Iran.

Received: 2019-12-08 Accepted : 2020-02-12 Published : 2021-12-22

Keywords: AqQA, Geographic information system, Rafsanjan, groundwater quality,

Abstract :

Background and Objective: Water quality determination is one of the basins management principles and one of the most important environmental and social issues in the world. In this study, in order to evaluate the water quality of Rafsanjan plain.Material and Methodology:  Water quality data collected by Regional Water Company of Kerman from 33 wells of the region between 2002 and 2016, were analyzed by AqQA software. They were analyzed using Piper, Schoeller, Wilcox, Durov and Stiff graphs.Findings: Then the most appropriate interpolation method for water quality zoning was selected by the Geographic Information System (GIS) among Inverse Distance Weighting (IDW) with powers of 1, 2 & 3 and Radial Basis Functions (RBF), Global Polynomial Interpolation (GPI), Local Polynomial Interpolation (LPI) and Kriging Method.Discussion and Conclusion: The results of water quality analysis based on Piper diagram showed that the study area has Na-Cl profile that belongs to the saline water group. The interpretation of Durov curve indicated that the amount of water soluble minerals in the water of area was more than 1000 mg/l that indicates there are high level of minerals in the water of area. The results also showed that salinity was very high in the study area due to the dominance of sodium and chloride ions in the water of the area. 

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