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dc.contributor.authorErisman JW
dc.date.accessioned2012-12-12T20:15:51Z
dc.date.available2012-12-12T20:15:51Z
dc.date.issued1990-06-30
dc.identifier723001003
dc.identifier.urihttp://hdl.handle.net/10029/260374
dc.description.abstractAbstract niet beschikbaar
dc.description.abstractFor each station in the Air Quality Monitoring Network in The Netherlands, where wind speed and wind direction are measured, roughness length values were calculated from the standard deviation of wind direction. The agreement between values presented here and those obtained by other methods is good. The uncertainty is estimated to be a factor 2. For each 1 x 1 km2, 5 x 5 km2 and 10 x 10 km2 gridcell over The Netherlands roughness length values were estimated using detailed information about landuse and forest characteristics. A comparison of these maps with those presented in the literature showed good agreement. Comparison of the grid average z0 values with those of the LML stations showed reasonable agreement, except for those which are surrounded by roughness elements in the near vicinity of the measuring location and for those which are situated in areas with very low roughness lengths. The uncertainty in the grid average z0 values is assumed to be about 40 - 60%.
dc.description.sponsorshipDGM/L
dc.format.extent24 p
dc.language.isoen
dc.relation.ispartofRIVM Rapport 723001003
dc.relation.urlhttp://www.rivm.nl/bibliotheek/rapporten/723001003.html
dc.subject15nl
dc.subjectruwheidslengtenl
dc.subjectlml stationsnl
dc.subjectkaarten van nederlandnl
dc.titleEstimates of the roughness length at Dutch Air Quality Monitoring Network stations and on a grid basis over the Netherlandsen
dc.title.alternativeSchattingen van de ruwheidslengte voor stations in het Landelijk Meetnet Luchtkwaliteit en in een regelmatig rooster over Nederlandnl
dc.typeReport
dc.date.updated2012-12-12T20:15:51Z
html.description.abstractAbstract niet beschikbaar
html.description.abstractFor each station in the Air Quality Monitoring Network in The Netherlands, where wind speed and wind direction are measured, roughness length values were calculated from the standard deviation of wind direction. The agreement between values presented here and those obtained by other methods is good. The uncertainty is estimated to be a factor 2. For each 1 x 1 km2, 5 x 5 km2 and 10 x 10 km2 gridcell over The Netherlands roughness length values were estimated using detailed information about landuse and forest characteristics. A comparison of these maps with those presented in the literature showed good agreement. Comparison of the grid average z0 values with those of the LML stations showed reasonable agreement, except for those which are surrounded by roughness elements in the near vicinity of the measuring location and for those which are situated in areas with very low roughness lengths. The uncertainty in the grid average z0 values is assumed to be about 40 - 60%.


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