Print Email Facebook Twitter Analysis of the Rijkoort-Weibull model Title Analysis of the Rijkoort-Weibull model Author Smits, A. Corporate name Rijkswaterstaat Date 2001-02-02 Abstract This report makes part of the KNMI Hydra project and it gives an overview of the reproduction and adjustments to the so-called "compound Weibull model for the description of surface wind velocity distributions"(Rijkoort, 1983). This model is used to calculate return levels of hourly wind speeds with high return periods (up to 10^4 years) at several stations in the Netherlands. It turned out that the persistence correction used in the model causes unreliable results with respect to the return levels of interest, especially when the correction is used in combination with the occurrence of the relatively many low wind speed values. In Order to use the model properly, adjustments have to be made. It makes sense to use a threshold to prevent the impact of low wind speed values and to determine the persistence correction based on physical grounds. Alternatively extreme wind models have been examined. The combined GEV distribution results in unreliable return levels due to the split up into seasons and wind direction groups. The one-step Markov chain model has to be extended substantially before results of interest can be obtained. Finally, the analysis of separate storms instead of the parent distribution of wind speed or the distribution of annual maxima of wind speed is discussed briefly. Subject wind speedclimatewindexceedance lines Classification SJC100100 To reference this document use: http://resolver.tudelft.nl/uuid:89ac9042-6147-4f98-8ca4-d05d81af3197 Publisher KNMI Source KNMI publication (hydra project) Part of collection Hydraulic Engineering Reports Document type report Rights © 2001 KNMI (Ilja Smits) Files PDF rw_analysis.pdf 5.73 MB Close viewer /islandora/object/uuid:89ac9042-6147-4f98-8ca4-d05d81af3197/datastream/OBJ/view