Qualitative changes Trend (in terms of sedimentation and corrosion) in drinking water of three villages of Sarbandan, Jaban and Ayinehvarzan, in Damavand area
Subject Areas :Farzaneh Ghodrati 1 , Mohammad Manshouri 2 , Mojtaba Syyadi 3 , Mahmoud Salari 4
1 - دانش آموخته کارشناسی ارشد آب شناسی،دانشکده علوم پایه، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران
2 - استادیار، گروه زمین شناسی، دانشکده علوم پایه، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران
3 - رئیس گروه تحقیقات شرکت آب و فاضلاب روستایی استان تهران
4 - استادیار، دانشکده علوم پایه، دانشگاه آزاد اسلامی، واحد پرند
Keywords: Sedimentation, Damavand, qualitative changes, Langelier’s index, Rayzanar’s index,
Abstract :
An intensive decrease has been occurred in discharge of drinking waters in some of villages of Damavand citywhich caused dramatical changes in quality and quantity drinking water of these wells. This research tries tostudy probable qualitative changes in these resources, as well as evaluating role of qualitative condition of waterin reduction of its quantity. According to the conducted studies, reduction in quantity of wells of the villages canbe attributed to two reasons: 1. Tectonic factors and geology of the region; 2. Chemical factor. Geological andtectonic studies revealed that tectonic factors had no effect on reduced discharge and quality, because tectonicfunctions linearly, while this was a point event. Therefore, it is more likely that there is a relation betweenchanges in quality and chemical factors and conditions. Finally, based on physical and chemical analysis ofwater samples and calculation of Langelier’s index and Rayzanar’s index on one hand, and study of geologicalformations, especially sequences of sediments in north of the region, with most frequent facies being chilefollowed by carbonated, dolomite facies, on the other hand. it can be said that water of studied wells makesediments. Therefore, study of hydrochemical conditions of groundwater of the studied zone, persistentmonitoring of ground water, videometery of wells, persistent discharge measurement, and identification ofsediment of pipe wall are recommended. Also, application of proper methods such as waterjet, ultrasound, acidpickling, and magnetic air shock (separately, or in hybrid manner) results in dissolution of sediments formed onthe wall of well.
