Investigating the Potential and Causes of Corrosion or Scaling of Drinking Water Resources in Varamin Village Villages and Preparation of its Distribution Model in GIS Geographic Information System

Subject Areas :

Ali  Mehmandost ¹ (دانش آموخته دانشکده محیط زیست و انرژی، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران، تهران- ایران)
Amirhesam  Hasani ² (دانشیار دانشکده محیط زیست و انرژی، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران، تهران- ایران)
Homauon  Ahmadpanahi ³ (دانشیار دانشکده شیمی، دانشگاه آزاد اسلامی، واحد تهران مرکز، تهران- ایران)
Reza  Poorrajab ⁴ (مدیر عامل شرکت آب و فاضلاب روستایی استان تهران - ایران)

Received: 2018-12-30 Accepted : 2018-06-12 Published : 2018-05-22

Keywords: GIS, Corrosion, Scaling, drinking water, Corrosion & Scaling index,

Abstract :

The problem of corrosion and Scaling in the discussion of chemical quality control of drinking water supply sources can be important due to the point of view that its effect on the network of drinking water transmission and distribution, both from the economic and health aspects. In this study, determining the potential of corrosion and scaling of Varamin city drinking water using Langelier saturation Index (LSI) and stability index Ryznar (RSI) for 10 main wells of Varamin City in the summer of 1394 and 1395 was done and the obtained data has been zoned on the Geographical information system (GIS). In order to calculate the above index as well as rooting the causes of the situation, water quality parameters such as: alkalinity, hardness, conductivity, total dissolved solids, magnesium, calcium, sodium, potassium, chloride, sulfate, fluoride, bicarbonate and pH was measured according to the book of “ Standard Method”. The results of chemical analysis and calculation of corrosive indices showed that the average LSI of the wells in the area in 1394 was equal to -0.01699 and in 1395 was equal to -0.3038, which shows a corrosive balance with increasing trend. The average RSI in this area in the year 1394 was 7.2428 and in 1395 was 8.0097 that confirmed the validity of the LSI index with a rational trend. Regarding that in the present situation, the stability situation is changing to corrosive state, Therefore in order to maintain and improve the health of citizens and also to increase the useful life of the plumbing equipment, the operation of water stabilization should be done in order to decrease its corrosive properties and maintain on its desired level.