Wind Atlas for South Africa (WASA) Observational wind atlas for 10 met. stations in Northern, Western and Eastern Cape provinces

Niels Gylling Mortensen, Jens Carsten Hansen, Mark C. Kelly, Steve Szewczuk, Eugéne Mabille, Eric Prinsloo

Research output: Book/ReportReportResearch

Abstract

As part of the “Wind Atlas for South Africa” project, microscale modelling has been carried out for 10 meteorological stations in Northern, Western and
Eastern Cape provinces.
Wind speed and direction data from the ten 60-m masts have been analysed
using the Wind Atlas Analysis and Application Program (WAsP 11). The windclimatological inputs are the observed wind climates derived from the WAsP Climate Analyst. Topographical inputs are elevation maps constructed from SRTM 3 data and rough-ness length maps constructed from SWBD data and
Google Earth satellite imagery. Summaries are given of the data measured at the 10 masts, mainly for a 3-year reference period from October 2010 to
September 2013.
The main result of the microscale modelling is observational wind atlas data sets, which can be used for verification of the mesoscale modelling. In
addition, the microscale modelling itself has been verified by comparing
observed and modelled vertical wind profiles at the 10 sites. WAsP generally works well, but modelling of the wind profiles can be improved by using
project-specific wind atlas heights and by changing the heat flux parameters of WAsP.
Original languageEnglish
PublisherDTU Wind Energy
Number of pages64
Publication statusPublished - 2014
SeriesDTU Wind Energy I
Number0243(EN)

Bibliographical note

For an electronic copy please contact the first author. Published as DTU Wind Energy E-0072 in 2014.

Keywords

  • DTU-Wind-Energy-I-0243(EN)
  • DTU-Wind-Energy-I-0243

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