شبيه سازي احتمال وقوع پرغذايي و تغييرات اكسيژن محلول در درياچه هاي انسان ساخت

Simulation of Eutrification and Dissolved oxygen Changes Probability in Artificial Lakes

Chitgar artificial lake, located in urban district 22 ofʹ Tehran, Municipality northwest of Tehran, has a volume of 10 million m^3 an average depth of 10m and an area of 22,1 hectares and is Iranʹs largest man-made lake. The most important water resources of the district, which can support the lake, are ian River, municipal runoff: the middle part Watershed runoffʹ and the treated wastewater of the urban region. In this study, the war to take water train each resource individually or together are discussed, and twelve different choices of resources to maintain the lake water are considered. In this research, WQRRS model has been run to each of the 12 aforementioned choices individually to predict phosphorus concentration as a nutrient in the lake for each one. This simulation has been clone during a five-.tear period, which is assumed to be a typical period o/ lime. In this war, it would be possible to predict the throphic level of the needed input data to rim the model: quality /actors, meteorological data, and geometrical characteristics of the reservoir, the characteristics of inflow and also the needed coefficients for the model. These data have been collected from hydrometric and meteorological stations of the region and also the results of other researches. After running the model, the simulation results show that the choices 2 and 4 are the best resources to support the lake water and have the /ewes/ difficulties in regard the eutrification problem. The results also show that DO concentration in kan River is at an acceptable level.