A numerical model is formulated for estimating the spatial distribution of rainfall on the meso-local scale. Widespread rainfall not influenced by convective processes is considered. The observed rainfall on the soil surface unaffected by orographically produced contributions and meteorological parameters on the large scale are used as inputs to the model. It is then used for computing the spatial distribution of rainfall incorporating the orographic effects in a parameterized form. The model is applied to four rainfall events over an area of the Upper Tiber River, central Italy, basin and the results compare reasonably well with the observations in each event. The error in computing mean areal rainfall ranges in magnitude from 1% to 15% and further for each event at least 75% of the pointestimates has an error of less than ± 30%.
Analysis of the effects of orography on surface rainfall by a parameterized numerical model
CORRADINI, Corrado
1985
Abstract
A numerical model is formulated for estimating the spatial distribution of rainfall on the meso-local scale. Widespread rainfall not influenced by convective processes is considered. The observed rainfall on the soil surface unaffected by orographically produced contributions and meteorological parameters on the large scale are used as inputs to the model. It is then used for computing the spatial distribution of rainfall incorporating the orographic effects in a parameterized form. The model is applied to four rainfall events over an area of the Upper Tiber River, central Italy, basin and the results compare reasonably well with the observations in each event. The error in computing mean areal rainfall ranges in magnitude from 1% to 15% and further for each event at least 75% of the pointestimates has an error of less than ± 30%.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
