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Improving Weather Radar Estimates of Rainfall Using a High Density
Expanded Title:Advancing radar rainfall estimates in South Africa is extremely important as the South African Weather Service (SAWS) upgraded its network of radars between 2009 and 2012 for millions of rands. This new radar network includes 9 single polarized S band radars, 1 dual polarized S band weather radar, 2 mobile dual polarized X band radars and 5 C band radars. The initial objective of this study was to calibrate this radar network to improve the accuracy and reliability of the data measured by these radars. Due to unavailability of SAWS radar network for research, the North-West University purchased and installed its own Parsivel disdrometer radar called NWU Lekwena weather radar in Potchefstroom in August 2014. Preliminary (1 year) results from this radar have highlighted the need to customise radars from overseas for the South African climatic conditions. After the calibration and customisation, results from this radar were compared to the newly installed rainfall network, and the results were highly correlated. The combination of the ongoing rainfall monitoring from the rain gauge network and rainfall measurement from the radar has greatly improved rainfall estimates in the area covered by this radar.
Date Published:01/12/2016
Document Type:Research Report
Document Subjects:Water Resource Management/IWRM - Hydrogeology
Document Keywords:Hydrology, Technology
Document Format:Report
Document File Type:pdf
Research Report Type:Standard
WRC Report No:2062/1/16
ISBN No:978-1-4312-0865-4
Authors:Burger R; Piketh S; Hauptfleish R; van Loggerenberg J; du Preez R
Project No:K5/2062
Originator:WRC
Organizations:North West University
Document Size:96 633 KB
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