PDF files showing 10-year flood-plain boundaries superimposed on aerial photos were included with the report on a CD-ROM.
NOTE: Because of
the high resolution and large file size of the original images in this series,
only a reduced-resolution preview version of each image can be served online.
To obtain a CD-ROM of the high-resolution images, please contact Information
Officer, USGS, 6480 Doubletree Ave., Columbus, OH 43229-1111.
These files are available online:
Battenhouse Ditch (1.8 mb)
Beaver Creek (5.6 mb)
Brighton-Camden Ditch (170 kb)
Engle Ditch (205 kb)
Gable Ditch (2.2 mb)
Heider Ditch (2.2 mb)
Plum Creek (1.8 mb)
Ridgeway Ditch (2.3 mb)
Schroder Ditch (2 mb)
The following are shown in all these viewable files:
Hydrologic and hydraulic analyses were done for selected reaches of nine streams in Lorain County Ohio. To assess the alternatives for flood-damage mitigation, the Lorain County Engineer and the U.S. Geological Survey (USGS) initiated a cooperative study to investigate aspects of the hydrology and hydraulics of the nine streams. Historical streamflow data and regional regression equations were used to estimate instantaneous peak discharges for floods having recurrence intervals of 2, 5, 10, 25, 50, and 100 years. Explanatory variables used in the regression equations were drainage area, main-channel slope, and storage area. Drainage areas of the nine stream reaches studied ranged from 1.80 to 19.3 square miles.
The step-backwater model HEC-RAS was used to determine water-surface-elevation profiles for the 10-year-recurrence-interval (10-year) flood along a selected reach of each stream. The water-surface profile information was used then to generate digital mapping of flood-plain boundaries. The analyses indicate that at the 10-year flood elevation, road overflow results at numerous hydraulic structures along the nine streams.
Description of the study area
Purpose and scope
Estimation of flood-peak discharges
Development of water-surface profiles
Delineation of flood-plain boundaries
Hydrologic analyses for rural basins
Hydrologic analyses for urban basins
Flow apportionment analyses for Engle Ditch
Storage area analyses for Heider Ditch
Hydrologic analyses for Heider Ditch
Analyses of open channels
Analyses of hydraulic structures
Results of hydraulic analyses
Base maps and flood-boundary delineation
This report is available online
To view PDF documents, you must have the Adobe Acrobat Reader (free from Adobe Systems) installed on your computer. (Download free copy of Acrobat Reader.) Users with visual disabilities can visit the access.adobe.com Web site for conversion tools and information to help make PDF files accessible.
The printed version of the full report is available free (while supplies last) from:
U.S. Geological Survey, 6480 Doubletree Ave., Columbus, OH 43229-1111,
e-mail Information Officer
and (at a nominal charge) from:
U.S. Geological Survey, Information Services, Box 25286, Denver, CO 80225
You can contact us directly by calling Toll Free Number: 1-888-ASK-USGS (1-888-275-8747), email Ask USGS
Note: When ordering the report, please supply the report title and number, your name, and your mailing address. Thank you.
For technical information regarding the report or the accompanying CD-ROM, please contact:
K. Scott Jackson at (614) 430-7707 or email at email@example.com,
Chad Ostheimer at (614) 430-7750 or email at firstname.lastname@example.org, or
Matt Whitehead at (614) 430-7749 or email at email@example.com
Water Resources of Ohio
|AccessibilityFOIAPrivacyPolicies and Notices|
|U.S. Department of the Interior, U.S. Geological Survey
Persistent URL: http://pubs.water.usgs.gov/wri034215
Page Contact Information: GS Pubs Web Contact
Last modified: Thursday, September 01 2005, 02:24:14 PM