dot
Detailansicht
Katalogkarte GBA
Katalogkarte ISBD
Suche präzisieren
Drucken
Download RIS
Hier klicken, um den Treffer aus der Auswahl zu entfernen
Titel Drop-size distribution of rainfall events in Coimbra, Portugal
VerfasserIn Silvia Carvalho, Isabel de Lima, João de Lima
Konferenz EGU General Assembly 2011
Medientyp Artikel
Sprache Englisch
Digitales Dokument PDF
Erschienen In: GRA - Volume 13 (2011)
Datensatznummer 250055475
 
Zusammenfassung
Rainfall events are typically characterized by high variability; therefore, the understanding of their properties at small time-scales, such as rain rate, duration and drop size and velocity distributions is of great importance. The purpose of this study is to analyse different rainfall events during the year, dedicating a particular attention to raindrop size distributions. The rain data inspected were collected in Coimbra (Portugal) by two rainfall continuously-recording instruments developed by Thies and Vaisala. The raindrop characteristics, which include the drop diameter and fall velocity, and the total number of drops were obtained at one-minute resolution by the Thies Laser Disdrometer. This work reports results of the analyses of 30 selected independent intense rainfall events. Average and event-based rainfall properties were investigated. For both cases descriptive statistics, such as mean, standard error, skewness, kurtosis and percentiles were determined and the type of raindrop diameter and velocity distributions was examined. For this purpose, the gamma and lognormal distribution were tested. The data was further inspected for different rain-intensity classes, searching for intensity-dependent event properties.