The purpose of this paper is to separate the total storm runoff into components by the following methods. (1) The first method is to separate the total discharge, using bio-geochemical indicator (δ18O, NO-3) into overland flow, inflow and groundwater flow by the mass balance equations describing the fluxes of water and the tracers in the stream. (2) The second methods are to separate the total runoff into each components by Filter separation AR method and Tank model.
