ON THE POSSIBILITY TO EXTEND LEAD TIME OF THE MEDIUM RIVERS STREAMFLOW FORECASTS THROUGH COUPLING OF NWP AND HYDROLOGICAL MODELS
In this paper, possible ways to extend lead time of the medium rivers streamflow forecasts through coupling of NWP and operational hydrological models are shown. Due to significant spatiotemporal uncertainty of the NWP models output, the modeled pre- cipitation cannot be used to simulate the runoff of small rivers; meanwhile they can be quite useful for operational forecasting in medium size catchments. In particular, the HIRLAM and LAPS models output data are considered as an input of the Sacramento Soil Moisture Accounting model used for modelling streamflow in medium scale catch- ments located in Australia, Finland and Japan.