Investigation of process of interception in beech-fir stand on mountain Goch

Abstract

Part of the precipitation is intercepted by vegetation before reaching the ground. The portion of intercepted water, which is retained in storage of the vegetal cover and evaporates, is called the interception loss. Interception represents important component of water balance, because of reduction of total rainfall. It decreases potential for forming of surface runoff. Depends on complex of vegetative and climate factors. In humid forested regions about 25% of the annual precipitation may become interception loss. Results of investigation in beech-fir stand on mountain Goch are presented in this paper Investigation was carried out on experimental catchment area Vaona IV (A=0.098 km2), in association Abieti-fagetum, on mountain Goch, in Central Serbia. Standard rain gauges were used to determine total precipitation and throughfalls, during vegetation period (1992-1997). Total interception (Ic) depends on total precipitation (Pb), kind of trees, shape and density of the crown, position in the stand and age. Average values of interception (Icsr) during vegetation period (1992-1997), amount to Icsr=43.7-53.3% of total precipitation (fir), and Icsr=17.7-22.8% (beech).