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SUMMER FLOODING AT CHICAGO AND POSSIBLE RELATIONSHIPS TO URBAN‐INCREASED HEAVY RAINFALL 1
Author(s) -
Chang Stanley A.
Publication year - 1980
Publication title -
jawra journal of the american water resources association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.957
H-Index - 105
eISSN - 1752-1688
pISSN - 1093-474X
DOI - 10.1111/j.1752-1688.1980.tb02398.x
Subject(s) - flooding (psychology) , storm , flood myth , environmental science , return period , hydrology (agriculture) , range (aeronautics) , meteorology , geography , geology , psychology , materials science , geotechnical engineering , archaeology , composite material , psychotherapist
: Studies of two measures of flooding in the Chicago metropolitan area reveal a wide range of floods with the magnitude related to recurrence interval expressions of rain intensity. Minor type floods (in basements and underpasses) usually result from localized heavy rains (≤ 3‐hour duration) with return intervals of 1 to 2 years, and more major floods result from rains with return intervals of 2 to 5 years (or more). Urban‐factors help lead to increases in warm season rain events in Chicago with 1‐ to 4‐year return intervals. These apparently help lead to 10 to 100 percent more flooding events in Chicago than expected. The range of increase varies depending on locale and type of flood, but the increases in storms should be accounted for in drainage designs.