2000 Volume 44 Pages 133-138
A lumped conceptual model, the Stanford Watershed Model (SWM) was used to simulate the runoff processes in the small forest watershed using the observed hydrological data for both the short and long period. Model parameters were calibrated with the runoff hydrograph at rain events only. In the rain runoff events, the changes of soil water vertical distribution were simulated accurately. Moreover, the results of separation of the runoff hydrograph using the SWM showed a good correspondence with those using SiO2 as tracer. For the long period calculation, the changes of simulated upper zone storage and active groundwater storage on the SWM had the similar periodicity to those of soil water matric potential at 20cm depth and 160cm depth, respectively. However, the runoff hydrograph and lower zone storage could not be simulated well, which suggests that it is necessary to improve each estimation method for the snowmelt process and the evapotranspiration process on the SWM.
