Ocena przydatności disdrometru laserowego i radaru meteorologicznego do szacowania wielkości opadów deszczu = Assessment of the suitability of the laser disdrometer and meteorological radar for rainfall estimation

Abstract

Measurements of precipitation conducted at the WULS-SGGW meteorological station in Warsaw in 2012-2014 and 2019-2020 using a tipping-bucket rain gauge and the laser disdrometer (Parsivel) as well as data obtained from the meteorological radar allowed to collect data enabling the assessment of the usefulness of the disdrometer and radar for estimating rainfalls. The data for the entire study period were used for analysis the correlation relationship between the 24-hour rainfall depths estimated on the basis of the rain gauge and the disdrometer. From the data set for the years 2012-2014, 21 individual events were selected for further analysis, for which rainfall data estimated on the basis of radar in the form of a PAC hydrological product were also available. The rainfall data from the disdrometer and radar were used for analysis the correlation relationships between them and corresponding measurements from the rain gauge. The scope of the study also included a comparison of the values of rainfall totals estimated for 21 single events using the disdrometer and radar in relation to data measured with the rain gauge. The simple method of adjusting the depths of rainfall estimated on the basis of the disdrometer proposed in this paper, was able to reduce significantly the differences in the values of rainfall totals for single events between the data from the disdrometer and the rain gauge.