The possibility to study the precipitation dynamics with advanced and specific tools is animportant task of the research activity addressing the understanding, the modeling, and themanaging of rainfall events. Over the last years, the hydrology laboratory of the Department ofCivil, Environmental, Aerospace Engineering, and Materials (DICAM) at the University ofPalermo, has installed several instruments for the monitoring and the study of precipitationwithin the urban area of Palermo (Italy).The main instrument of this system is the X-band weather radar, which allows monitoring theprecipitation fields with high resolution in space and time. This instrument is supported by arain gauges network of 18 tipping bucket gauges spread over the observed area, a weight raingauge, an optical disdrometer, and a weather station. The information provided by differentdevices can be combined in order to integrate different data and correct errors.In particular, the disdrometer is able to provide the drop size distribution (DSD) that is directlylinked to the parameters used to transform radar reflectivity to precipitation estimates.Moreover, disdrometer observations can be used to classify the precipitation events. The raingauges network data is used to apply a ground correction to the radar precipitation maps. Suchan operation is useful to constrain the radar estimate to the observed ground precipitation value.Results obtained from a prototypal version of the system, that considers only the mainapplications designed, are discussed for a study event.Finally, all of the above instruments are embedded in an integrated early warning system ableto provide warnings related to possible flood in the urban area of Palermo.
|Numero di pagine||8|
|Stato di pubblicazione||Published - 2014|