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Prediction of annual floods generated by mixed processes
Author(s) -
Waylen Peter,
Woo Mingko
Publication year - 1982
Publication title -
water resources research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.863
H-Index - 217
eISSN - 1944-7973
pISSN - 0043-1397
DOI - 10.1029/wr018i004p01283
Subject(s) - gumbel distribution , snowmelt , flood myth , environmental science , hydrology (agriculture) , meteorology , climatology , geography , snow , geology , extreme value theory , statistics , mathematics , geotechnical engineering , archaeology
In areas where the annual flood series is generated by more than one distinctive hydrologic process, the Gumbel distribution does not provide a satisfactory fit. Physical evidence is used to identify the flood‐generating processes, which in the Cascade Mountains include snowmelt and rainfall. Individually, the snowmelt and rain generated annual floods are adequately modeled by simple Gumbel distributions. These distributions have to be compounded to provide a good fit to the annual floods which are produced by mixed processes.