Improvement of quantitative precipitation estimates in Belgium.
Earth and related Environmental sciences
quantitative precipitation estimates (QPE)
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In this paper we describe the recent improvements of quantitative precipitation estimates (QPE) based on radar observations and rain gauge measurements and we present verification statistics. These improvements concern the implementation of an advection procedure aimed at correcting for the effect of the time sampling interval on accumulation maps and the implementation of several radar-gauge merging techniques. A first simplified correction based on a climatological Vertical Profile of Reflectivity (VPR) has been also implemented. Radar observations are available from a C-band Doppler radar located in the south of the country (Wideumont) and operated by the Royal Meteorological Institute of Belgium (RMI). Gauge observations are available from the automatic network operated by the hydrological service of the Walloon region. Gauge observations from the RMI climatological network are used for verification purpose. The radar-gauge merging techniques which have been implemented are of various degrees of complexity: from mean bias correction to sophisticated geostatistical radargauge merging techniques. The merging is performed using the gauge data from the automatic networks and applied to the 24h precipitation accumulation. In this paper we first present the radar and gauge observations. The advection procedure, the VPR correction and the radar-gauge merging procedures are described in section 3, 4 and 5, respectively. Verification statistics using various quality parameters are presented in section 6 aswell as a sensitivity analysis to the density of the gauge network used for the adjustment.
CitationDelobbe, L.; Goudenhoofdt, E.; ,Mohymont, B. (2008). Improvement of quantitative precipitation estimates in Belgium.. , Issue Proceedings of the Fifth Conference on Radar in Meteorology and Hydroloy (ERAD 2008), Helsinki, Finldand., 1/4/2015, IRM,