| Since raingauges give pointwise measurements the small scale variability of
rainfall fields leads to biases on the estimation for the rainfall over the
whole basin. In this context meteorological radars have several advantages
since a single site is able to obtain coverage over a wide area with high
temporal and spatial resolution.
The purpose of this study is to compare the capability of the two different
measurement systems in order to give correct input to drive rainfall-runoff
models. Therefore a geomorphological model was calibrated, using firstly
raingauge data and secondly radar rainfall estimates, for the Treja river
basin. In this way it is possible to determine different sets of parameters
and the influence of measurement system in hydrological modelling.
The results shown that radar rainfall data is able to improve significantly
hydrographs reconstructions. |