ارزیابی دبی و کیفیت آب در ایستگاه بدوی رودخانه قره سو اردبیل

Rivers are vessels of water transportation all over the lands which can use in different parts such as agriculture and drinking, so paying attention to quantity and quality of water have numerous importance. This study aimed to assess both trait of water in one of the most important river which is located in country’s North West. For this purpose, 20 years statistics for Ardebil Qarehsou river discharge and chemical characteristics in Badvi station have been used. In this study at first, quantitative properties such as annual sediment discharge, maximum annual discharge and hydrological drought have studied. In the next section, qualitative study of river such as solved solids concentration and connection between some parameters with discharge have analyzed. The results showed average of annual discharge was 1020 lit/s and since 1993, monthly discharge was even lower than average discharge. Annual sediment discharge calculated 32.1m3 which is considerable by according to discharge. In part of hydrological drought study, it is determined since 1993, this drought was happened in this river. In qualitative study part, correlation between three parameters(TDS, EC and SAR) with discharge analyzed and then results shows the highest correlation by 0.6886 coefficient is related to EC with discharge and thus for maintaining the quality, of river, some ideas have to consider that anthropogenic activities which cause diminish the discharge, isn’t done.