Reservoir water quality management of Baft dam through selected drainage from the dam outlet locations using the model CE-QUAL-W2

Operation of the dam reservoirs includes a series of quantitative and qualitative goals that include providing water needs, flood management and environmental requirements in the quantitative part and providing adequate quality requirements, reducing the destructive effects of thermal imprinting and preventing the supply of nutrients in the qualitative sector. Awareness of thermal layering changes over the long term is important and proper management can have a significant impact on the costs of water treatment and reduce costs. In this research, the reservoir of Baft Dam in Kerman province was studied and the temperature conditions of the reservoir layers were predicted for a period of 37 years. Then, the best layer in the thermocline range, namely, the temperature decrease rate with increasing depth, with a minimum emission factor Determined. Existing data includes a 12-month interval of six months for calibration and six months for validation. In order to analyze, three scenarios are used: high water, normal and dehydrated and To simulate the behavior of the reservoir according to the existing conditions, the two-dimensional CE-QUAL-W2 model was recognized as the most appropriate model and with the help of this mathematical model; a deep profile of the temperature was obtained. The results indicate that this layering begins weakly in April with the start of the heat period and will intensify in June. The depth of the Thermocline during the period of heavy layering in August is 6 meters deep at a depth of 20 meters from the bottom, which is the depth of the best depth of water harvesting during the thermal molding period.