Abstract
In this paper, some considerations are given to the employment of C-band polarimetric weather radars for rainfall estimates. The most common error sources are discussed, such as ground clutter and propagation attenuation effects, together with decorrelation in the sampling at the ground between radar and raingauge measurements, which can be quite significant in radar systems located in hilly regions, as is the case of the Arno basin in Tuscany. Since the main objective from a hydrological point of view is the estimate of rainfall at ground, integrations and comparisons are needed between radar and raingauge data, which are characterized by different time and space sampling. The paper is then focussed mainly on this problem and a technique is presented in order to improve radar based rainfall estimates through the integration with raingauge data, in order to enhance the correlation between the two types of measurements. Such a method is finally applied to a serious meteorological event which affected the Arno basin on October 1992.
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References
Aydin, K., Seliga, T. A. and Zhao, Y.: 1989, ‘Rain Induced Attenuation Effects on C-band Dual Polarization Meteorological Radars’,IEEE Trans. on Geosc. and Remote Sensing 27 (1), 57–65.
Baldini, L., Fabietti G., Gherardelli M. and Giuli D.: 1993, ‘Multiparameter Classification and Filtering of Ground Clutter in Meteorological Radars’, EGS XVIII General Assembly, Wiesbaden, 3–7 May.
Browning, K. A. and Collier, C. G.: 1981, ‘An Integrated Radar-Satellite Nowcasting System in the UK’, inNowcasting, K. A. Browing ed.
Collier, G. C., Harrold, T. W., and Nicholass, C. A.: 1975, ‘A Comparison of Areal Rainfall as Measured by a Raingauge-Calibrated Radar System and Raingauge Networks of Various Densities’, Preprints 16th Radar Met. Conf. Houston, AMS, 467–472.
COST '72, Coordination Committee, 1985:‘Measurement of precipitation by radar’, Report EUR 10171.
Hildebrand, P. H., 1978: ‘Iterative Correction for Attenuation of 5 cm Radar in Rain’,J. Appl. Meteor. 17, 508–514.
Marshall, J. S. and Palmer, W. M. K: 1948, ‘The Distribution of Raindrops with Size’,J. Meteor. 5, 165–166.
Scarchilli, G., Gorgucci, E., Giuli D., Facheris L., Freni A. and Vezzani G.: 1991, ‘Arno Project: Radar System and Objectives’, Proc. of 25th Intern. Conf. on Radar Meteorology, Paris, AMS, 805–808.
Wilson, J. W. and Brandes, E. A.: 1979, ‘Radar Measurement of Rainfall -A Summary’,Bull. Am. Met. Soc. 60, 1048–1058.
Zawadski, I.: 1984, ‘Factors Affecting the Precision of Radar Measurements of Rain’, Proc. 22nd Intern. Conf. on Radar Meteorology, Boston, AMS, 251–256.
Zawadski, I., Desrochers, C., Torlaschi, E. and Bellon A.: 1986, ‘A Radar-Raingauge Comparison’, Proc. 23rd Intern. Conf. on Radar Meteorology, Snowmass, AMS, 121–124.
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Baldini, L., Facheris, L., Giuli, D. et al. Analysis of radar and raingauge measurements for a critical meteorological event in Tuscany. Surv Geophys 16, 253–264 (1995). https://doi.org/10.1007/BF00665782
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DOI: https://doi.org/10.1007/BF00665782