Floods of May 17-20, 1999, in the Volga and Wapsipinicon River Basins, Northeast Iowa, HR-140, 1999

(1999) Floods of May 17-20, 1999, in the Volga and Wapsipinicon River Basins, Northeast Iowa, HR-140, 1999. Transportation, Department of

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Abstract

Record flooding occurred May 17-20, 1999, in the Volga and Wapsipinicon River Basins following thunderstorm activity over northeast Iowa. On Sunday, May 16, between 6 and 8 inches of rain fell during a 24- hour period over portions of Bremer, Butler, and Fayette Counties. Highest rainfall during this 24-hour period was 8.3 inches recorded north of Oelwein in southwest Fayette County. A peak discharge of 29,800 cubic feet per second in the Volga River at Mederville, 53,900 cubic feet per second in the Turkey River at Garber, and 31, 100 cubic feet per second in the Wapsipinicon River at Independence set new peak discharge records. The peak discharge at Garber was greater than a theoretical 500-year flood, and the peak discharge at Independence was the equivalent of a 90- year flood. Information about the basins, rain storms, flooding, and a profile of high water marks are presented for selected intervals along the Volga River, Wapsipinicon River, Crane Creek, Little Wapsipinicon River, and Otter Creek.

Item Type: Departmental Report
Keywords: Flood protection, Floods, Rainfall, River Basin, Streamflow, Water table
Subjects: Transportation
Transportation > Research
Transportation > Environment
Transportation > Environment > Water
Transportation > Environment > Weather and climate
ID Code: 17006
Deposited By: Iowa DOT Library
Deposited On: 02 Jun 2014 16:14
Last Modified: 15 Jun 2017 19:52
URI: http://publications.iowa.gov/id/eprint/17006