Usage of large-scale hydrological information for runoff estimation in ungauged catchments

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200208938

Keywords: hydrological scale; runoff estimation; ZEMOKOST; regionalisationThe study indicates that large-scale hydrological assessment is an appropriate method to produce cost- and time-saving input information for precipitation-runoff models. The results show, that this data can be used for smaller meso-scale-catchments as well. Unfavourable outliers cannot be excluded, especially for very small catchments. Field mapping based on large scale maps helps to improve runoff assessment at the small-scale and to minimise the risk of outliers. Each of the described methodical approaches has clear advantages and limitations (quality, level of uncertainness vs. costs, operability). A suggestion for best practise could be to substitute the common terms of hydrological scales (micro-, meso- and macroscale) by the terms of experimental-, field mapping- and model-/derived scale.