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A Peak Discharge Relation for Intermediate Drainage Basins
Author(s) -
Watt W. E.,
Kennedy R. J.
Publication year - 1969
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/wr005i006p01406
Subject(s) - hydrograph , hydrology (agriculture) , drainage basin , structural basin , storm , drainage , geology , geomorphology , geography , geotechnical engineering , oceanography , cartography , ecology , biology
For ungaged drainage basins of intermediate size, a peak discharge‐frequency relation may be determined from a frequency distribution of rainfall excess and a method for relating peak discharge to rainfall excess. For short‐period hydrographs a one‐parameter peak discharge relation employing the basin lag t o is satisfactory. The suggested relation is Q P = CV / t o . If t o is expressed in hours and Q P / V is expressed in cfs per square mile‐inch, the expression becomes Q P / V = 645 C / t o , where C on theoretical grounds varies between 0.74 and 1.05. Analysis of the records of 45 isolated intense storms on 12 drainage basins in southern Ontario provided satisfactory confirmation of the above relation with C equal to unity.