Introduction 1 Weather conditions preceding the flood of July 1-2,1987 : Precipitation and runoff during the flood 3 Effects of the flood on municipalities in north-central
No abstract
The storm of July 4-5, 19C 1 , in north-central Ohio was an unprecedented event; never before has such intense and widespread precipitation been recorded for a summer storm in Ohio (U.S. Dept. of Commerce, 1969). More than 14 inches of rainfall in less than 24 hours were observed at several places. In areal extent more than 4 inches of rainfall occurred on about 6,000 square miles. Record-breaking floods were observed at many places in north-central Ohio. Of the 50 sites for which the peak discharge was determined 40 are located on unregulated streams. The peak discharge at five of the 40 sites was four times as large as the discharge of the 50-year flood and the peak discharge for 17 sites was more than twice as large as that of the 50-year flood. Severe losses in terms of lives and property damage were experienced; 41 deaths and more than $66 million in property damage were attributed to the rainstorm, accompanying wind, and resulting floods. This report summarizes peak stages and (or) discharges at 55 sites including five reservoirs, in upper Muskingum River basin, in lower Sandusky River basin, and in the Huron River, Vermilion River, and Black River basins. To define maximum rates of runoff, indirect measurements of peak discharges Jere obtained at 19 miscellaneous sites on streams in the areas of greatest rainfall. Results of these measurements supplement records for gaging stations in the area in describing the severity of the floods. Indirect measurements of peak discharge were obtained at 14 gaging stations to provide better definition of the stagedischarge relationships. Purpose and Scope The purpose of this report is to present a compilation of hydrologic data that document the magnitudes of '..he outstanding floods that resulted from the storm of July 4-5, 1969. The iw,reasing public interest in flood protection and flood-plain management attests to the advisability of preserving significant information on the flood in one report. This report documents pertinent information on the July 1969 flood in a form useful to those designers, planners, and others who are concerned with flood-protection or other water-related projects. The report discusses the precipitation, flood damages, measurement of flood discharges, and relates the magnitude of the 1969 floods to those of maximum floods previously known and to the 50-year flood. The flood data herein are limited to instantaneous maximum stages and discharges. Information on volumes of flood runoff and duration of flooding may be obtained from the annual report of the U.S. Geological Survey (1969) entitled, "Water Resources Data for Ohio, Part 1, Surface Water Records." Acknowledgments The documentation of basic streamflow records in Ohio is part of a continuing cooperative program with the Ohio Department of Highways, the Ohio Department of Natural Resources, the Miami Conservancy District, the city of Columbus, and the Corps of Engineers, Department of the Army. 3 The field and office work of collecting and tabulating basic records of streamflow as well a...
This report documents flood data for Killbuck Creek, Apple Creek, and Little Apple Creek at Wooster, Ohio, to show the high-water elevations and corresponding discharges produced by the July 5, 1969 flood. This flood resulted from a violent storm with officially recorded rainfall in excess of 10 inches and unofficial catches of over l4 inches in the vicinity of Wooster during the 18-hour storm period. A more detailed analysis of data for Killbuck Creek was made in order to define an estimated profile of the July 5 flood for an assumed condition with no obstructions present in the channel or on the flood plain. The 50-year frequency flood profiles on Killbuck Creek were also developed for existing conditions and for the assumed condition of no obstructions.
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