Regional partial duration series modelling of hydrological droughts in Zimbabwean rivers using a two-component exponential distribution

Thomas R. Kjeldsen, Allan Lundorf, Dan Rosbjerg

Research output: Contribution to journalConference article

4 Citations (Scopus)

Abstract

A regional analysis of hydrological droughts is conducted using the partial duration series model with the two-component exponential (TCE) distribution as exceedence distribution. The index-flood method is applied in order to obtain more efficient estimates of the T-year events. Only one of the three parameters of the TCE distribution contributes significantly to the uncertainty of the T-year events and, therefore, only this parameter is regionalized. In total 25 gauging stations covering most of Zimbabwe were used to identify sufficiently homogeneous regions for use with the index-flood method. Separation of the stations according to mean annual precipitation indicated the existence of three or possibly more homogeneous regions, though the limited number of available stations did not allow for any rigorous conclusions.

Original languageEnglish
Pages (from-to)145-153
Number of pages9
JournalIAHS-AISH Publication
Issue number255
Publication statusPublished - 1 Dec 1999
EventProceedings of the 1999 IUGG 99, the XXII General Assembly of the International Union of Geodesy and Geophysics - Birmingham, UK
Duration: 18 Jul 199930 Jul 1999

ASJC Scopus subject areas

  • Oceanography
  • Water Science and Technology

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