Estimation of sub-daily rainfall accumulations by merging radar and rain gauge data for near real-time use
Crossley A.L.
The second report of the Rainfall Network Collaboration Project, Radar - Rain gauge Merging sub-project, considers merging radar and rain gauge data for sub-daily accumulation periods. The report determines how applicable the statistical based Kriging with external Drift (KED) and the deterministic based Recursive Filter (RF) merging schemes are to sub-daily accumulation periods. A case study of the two methods, applied to rainfall data from October and November 2000 period in the EA-Tames region, was completed. The case study compared the two merging schemes with Nimrod Radar accumulations and Ordinary Kriging of Rain gauge data. The EA-Thames region which contains over 100 hourly reporting gauges and is covered by the Nimrod Radar field allowed two rain gauge densities to be investigated for six accumulation periods ranging from 1 hour to 24 hours. The gauge rainfall correlation was modelled for the statistical methods KED and OK using a spherical function for each accumulation period at each time. The ...
Accès à la notice sur le site du portail documentaire de Météo-France