Complex dynamics of water quality mixing in a warm mono-mictic reservoir

Cycling of water quality constituents in lakes is affected by thermal stratification and homo-thermal conditions other factors such as oligotrophication, eutrophication, microbial activities. In addition, hydrological variability can cause greater differences residence time cycling man-made (reservoirs) than natural lakes. Thus, investigations are needed on vertical mixing new impounded reservoirs, especially those constructed to supply domestic water. this study, sampling campaigns were conducted the Sabalan reservoir, Iran, investigate changes constituent concentrations during year periods with conditions. The results revealed incomplete constituents, even cold months when reservoir was homo-thermal. These interacted create a bottom-up regulated sediment that released settled pollutants, impairing both Analysis total nitrogen phosphorus eutrophic. External pollution loads, internal pollutants diffusing out from bottom sediments, reductions inflow operations throughout year.