Geographical variation of extreme point rainfall

  • Rosbjerg, Dan (Project Participant)
  • Arnbjerg-Nielsen, Karsten (Project Participant)
  • Harremoës, Poul (Project Manager)

    Project Details


    In 1979 the institute initiated a nationwide rain gauge system suitable for monitoring short, intense rain events. The system consists of approximately 70 measuring stations separated by one to 300 km, and covering a total of 43,000 square kilometres. At the present time the longest records include 16 years of data. Statistical analysis of the new data reveals a remarkable geographical variation which can be explained only partially by correlation with regional climatological variables that describe differences in physiography and microclimate. In addition to sampling errors orginating from use of limited samples for estimation at individual sites, there is a significant statistical residual that cannot be explained by a regional model. Consequently, the engineering application of rainfall data for design and analysis are being revised. Part of the conclusions have recently been published in a new guide from the Danish Water Pollution Control Committee.
    Effective start/end date01/08/199630/06/1999

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