Tritium concentrations in the natural waters of Belgrade region

The tritium concentrations from the monthly samples of Danube and Sava river waters, precipitations and some alluvial underground water in the Belgrade region for the period 1978 - 1982 are presented. Measurements are performed in order to establish the hydrological characteristics of the Belgrade water supply region. The concentration of 3H in the precipitations gradually decreases and similar behavious in the river waters is noticed. Towards the end of the presented period the concentrations of 3H in the Danube water become relatively higher than in the Sava water. The measurements of 3H concentrations in the alluvial underground water shows that 3H from the river and the precipitation migrates differently in the different alluvial layers. In some layers the concentrations are higher than in the river water due to slower flow of the water in the alluvium. (Author)