hydrology Article Assessment of TOPKAPI-X Applicability for Flood Events Simulation in Two Small Catchments in Saxony Firas Al Janabi 1, Nurlan Ongdas 2,*, Christian Bernhofer 3, Julian David Reyes Silva 1 , Jakob Benisch 1 and Peter Krebs 1 1 Faculty of Environmental Sciences, Department of Hydrosciences, Institute of Urban Water Management, Technical University of Dresden, 01062 Dresden, Germany; fi
[email protected] (F.A.J.);
[email protected] (J.D.R.S.);
[email protected] (J.B.);
[email protected] (P.K.) 2 ON-Oekohydroprojekt, Aiteke bi 120400, Kazakhstan 3 Faculty of Environmental Sciences, Department of Hydrosciences, Institute of Hydrology and Meteorology, Chair of Meteorology, Technical University of Dresden, 01737 Tharandt, Germany;
[email protected] * Correspondence:
[email protected] Abstract: Numerical simulations of rainfall-runoff processes are useful tools for understanding hydrological processes and performing impact assessment studies. The advancements in computer technology and data availability have assisted their rapid development and wide use. This project aims to evaluate the applicability of a physically based, fully distributed rainfall-runoff model TOPKAPI-X for the simulation of flood events in two small watersheds of Saxony, Germany. The 2 results indicate that the model was calibrated well for 4.88 km Wernersbach catchment (NSE 0.89), whereas 276 km2 Wesenitz catchment calibration was only satisfactory (NSE 0.7). The addition of the Citation: Janabi, F.A.; Ongdas, N.; second soil layer improved the model’s performance in comparison to the simulations with only one Bernhofer, C.; Reyes Silva, J.D.; soil layer for Wernersbach (NSE increase from 0.83 to 0.89).