A Comparative Investigation of Various Pedotransfer Functions and Their Impact on Hydrological Simulations

Soil hydraulic properties, which are basically saturated and unsaturated conductivity water retention characteristics, remarkably control the main hydrological processes in catchments. Thus, adequate parameterization of soils is one most important tasks physically based catchment modeling. To estimate these choice PTFs a model often made without taking runoff characteristics into consideration. Therefore, this study introduces methodology to analyze sensitivity balance PTF. do so, we define 11 scenarios including different combinations van Genuchten parameters conductivity. We use calibrated/validated (WaSiM-ETH) as baseline scenario. By altering underlying PTFs, effects on properties quantified. Moreover, resulting changes spatial/temporal variation total particular, components at outlet. Results reveal that distribution hydrologic system varies considerably amongst highly sensitive spatial structure soil properties. It recommended models be tested by careful consideration orienting more towards representing plausible behavior rather than focusing matching calibration data.