Determination of leakage losses from Demirköprü dam

ABSTRACT Leakage losses from Demirköprü Dam were investigated in this study. In this scope, monthly precipitation and evaporization values as well as monthly stream flow values into and out from the rezervoir in the 1980-1992 water year were used. Leakage losses were calculated monthly by the use of the water equilibrium equation. It was determined that the leakage losses increase by the increasing side surface area of the reservoir. In order to determine the water levels between which the occurrence of relatively more or less leakage losses take place, the leakage losses calculated in 106 nrrVmonth units, were expressed as the unit side surface area leakage loss (m3/m2/month) and the relationship between these values and the water level h(m) was investigated. As a result of this investigation, in the related years, when the water level which changes in the range 215,50m - 242,50m is found between 215,50m - 218,50m, the leakage losses reach the maximum values. In order to find out whether these losses are different than the leakage losses in the 24m high region between the 218,50m and 242,50m, this region was divided into three 8m high subregions. The leakage losses in this three subregions and the leakage losses in the region between 215,50m - 218,50m where high leakage losses occur were found to be statistically %95 different than each other, however, it was determined that this difference was among the expected values under normal conditions. VII