Physicochemical Pollution of Water Wells in the Villages around Damavand by Using the Geographic Information System

Subject Areas : Water Resource Management

Mohadeseh Hadadi ¹ ( MSc, Department of Environment, Technical and Engineering Faculty, North Tehran Branch, Islamic Azad University, Tehran, Iran. )
Maryam Rafati ² ( Assistant Professor, Department of Environment, Technical and Engineering Faculty, North Tehran Branch, Islamic Azad University, Tehran, Iran. *(Corresponding Author) )
Mojtaba Sayyadi ³ ( MSc, Tehran Province Water and Wastewater Company, Tehran, Iran. )

Received: 2020-07-19 Accepted : 2020-11-17 Published : 2021-12-22

Keywords: GWQI indicator, GIS, Water Resource Management, Pollution, Ground water,

Abstract :

Background and Objective: Considering the water shortage and drought crisis in recent years, the importance of examining the quality of groundwater resources has become more important day by day, and in this regard, the Geographic Information System (GIS) is one of the best methods to help managers for optimization their decisions. Therefore, the purpose of this research was to investigate the pollution and qualitative changes in water well in villages around Damavand city by using GIS. Material and Methodology:  Eleven water wells were sampled in the villages of Masha, Chenar Sharghi, Luman, Wadan, Zan, Ayneh Varzan, Jaban, Sarbandan, Aro, Seyedabad, and Islamabad during wet and drought periods. Then, using IDW interpolation methods, the water well information, which is in the form of points, was generalized to the surface and map was prepared. Findings: The results showed that the water in the wells of the studied area is good for drinking and agriculture purposes. According to GIS maps, the most polluted well is located in the village of Vadan, where EC and sodium levels are above the standard level due to the geological structure of the south of the city and the improper water abstraction of this well. In terms of the GWQI index, it was found that the villages of Aynevarzan, Zan and Seyedabad in both periods of study, due to having a quality number of less than 20, are more suitable than other areas for drilling wells in the future. Discussion and Conclusion: Since Damavand has a lot of agricultural and orchards lands that are sprayed periodically and the use of chemical fertilizers are high, it is possible that in the future, the condition of these wells will exceed the standard threshold. However, based on the results of this study at the sampling time, the condition of these wells was suitable.

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