O'Beirne, Sean2019-07-302019-07-301992https://hdl.handle.net/10539/27821A Dissertation Submitted to the Faculty of Science, University of the Witwatersrand, Johannesburg, for the Degree of Master of ScienceTwo aspects of radar-based measurement of convective rainfall over the Transvaal Highveld are examined. Drop size distributions (DSDs) are studied in order to quantify the effects of drop size distribution variability on the Z-R relationship, and the area-time integral (ATI) method is investigated as a possible means of radar rainfall measurement. Drop sorting effects are clearly evident in convective rain with resultant DSDs having higher numbers of large drops and causing Z-R derived rain rates to be overestimated. Abbreviation abstract)enRain and rainfall -- South Africa -- Transvaal -- MeasurementWeather radar networks -- South Africa -- TransvaalMeteorology -- Research -- South Africa -- TransvaalThesis