WATER FLOWPATHS IN THE MOUNTAINOUSWATERSHED TRACED BY 18O ISOTOPE

摘要

Uhlirska, Jizera Mountains, Czech Republic, is a typical watershed with thecrystalline bedrock forming Cambisols. It is situated in a humid mountainous regionwhere soils are shallow and highly permeable with preferential pathways. As a result ofthese facts, outflow caused by storms can be of a quick response and high magnitude.Based on the observations performed since 1998, it becomes evident that soil profileplays dominant role in the rainfall-runoff transformation. Data collection of the waterregime in the soil profile and the subsurface flow accompanied with the standardclimatic and hydrological monitoring is performed. Due to the fact that the behavior offlow of water in the heterogeneous soil profile and hydrogeological structure is not fullyunderstood, quantitative measurements are supplemented by the additional techniquesof the tracing of stable oxygen isotope 18 O and silica since 2006 in rainfall, outflow andsoil and groundwater.