Fig. 1
Aggregated water budget and drought stress indicators at the NFI inventory cluster 16,699, plot 2, simulated using the beech parameter set. (a) Monthly transpiration difference (TDiff) and water fluxes of transpiration (Ta), rain and snow interception evaporation (IR, IS), soil and snow evaporation (Esl, Esn), drainage (R), surface runoff (D) and precipitation (P). Negative values indicate drainage to groundwater and surface runoff, positive values indicate fluxes to and from the atmosphere. (b) Daily (lines) and monthly (symbols) total (S, Savg) and plant available relative (REW, REWavg) root zone water storage, (c) daily (PSI, line) and monthly soil water potential (PSIavg, circles) and maximum water table depths (zsatmax, tildes) (c). Drought stress indicators TDiff (a), v_REWCL (b) and v_PSICL (c) are marked as hatched areas