Modeling reservoir water electrical conductivity under the thermal stratification effect

In this study, the Electrical conductivity (EC) of Ekbatan reservoir water in Hamedan Province (Iran) under the impact of thermal stratification changes and water temperature for seven-scenario of reducing inflow and outflow has been assessed using the CE-QUAL-W2. Results showed that the highest and lowest EC is related to scenario of 10 and 30% reduction of outflow, respectively. Therefore, the EC largely depends on discharge, and it shows that policies of controlling the outflow can improve and reduce the salinity in water and soil. In autumn and winter, complete mixing has occurred, and thermal stratification has begun in middle of spring and continues until the end of summer. The highest EC was observed before occurrence of thermal stratification and the lowest EC was observed at the end of thermal stratification phenomenon. The lowest EC related to the fourth scenario is equal to 0.1 S/m occurred in Spring, and the highest value related to the second scenario is equal to 0.2 S/m occurred in Winter, and degree of EC sensitivity relative to temperature changes is higher than flow changes in reservoir.