Stream-Profile Analyses Using a Step-Backwater Model for ... - USGS
Stream-Profile Analyses Using a Step-Backwater Model for ... - USGS Stream-Profile Analyses Using a Step-Backwater Model for ... - USGS
U.S. Department of the Interior KEN SALAZAR, Secretary U.S. Geological Survey Marcia K. McNutt, Director U.S. Geological Survey, Reston, Virginia: 2011 For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment, visit http://www.usgs.gov or call 1-888-ASK-USGS For an overview of USGS information products, including maps, imagery, and publications, visit http://www.usgs.gov/pubprod To order this and other USGS information products, visit http://store.usgs.gov Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this report is in the public domain, permission must be secured from the individual copyright owners to reproduce any copyrighted materials contained within this report. Suggested citation: Straub, D.E., Ebner, A.D., 2010, Stream profile analysis using a step backwater model for selected reaches in the Chippewa Creek basin in Medina, Wayne, and Summit Counties, Ohio: U.S. Geological Survey Scientific Investigations Report 2011-5024, 78p.
Contents Abstract ...........................................................................................................................................................1 Introduction.....................................................................................................................................................1 Description of Study Area ...................................................................................................................4 Flood-Control Modifications ...............................................................................................................4 Purpose and Scope ..............................................................................................................................4 Study Methods ...............................................................................................................................................6 Data Collection ......................................................................................................................................6 Hydrology ...............................................................................................................................................7 Development of Water-Surface Profiles ...........................................................................................8 Analyses of Open Channels ................................................................................................................8 Analyses of Hydraulic Structures ....................................................................................................10 Reduction of Roughness Coefficient Analysis ...............................................................................10 Results of Hydraulic Analyses ...................................................................................................................10 Summary .......................................................................................................................................................11 References Cited..........................................................................................................................................11 Appendix 1. Descriptions of Benchmarks ............................................................................................13 Appendix 2. Selected Hydrologic Engineers Center’s River Analysis System Output for Chippewa Creek, Westfield Ditch, River Styx, and Little Chippewa Creek .........33 Appendix 3. Computed Water-Surface Elevations for Chippewa Creek, River Styx, and Little Chippewa Creek ............................................................................57 Figures 1. Map depicting selected features of the Chippewa Creek basin in Medina, Wayne, Stark, and Summit Counties, Ohio. ..........................................................2 2. Chippewa Creek looking upstream from Shorle Road. ..........................................................3 3. Chippewa Creek looking upstream from abandoned railroad near mouth .........................3 4. Map depicting selected features pertaining to the models of the Chippewa Creek basin in Medina, Wayne, Stark, and Summit Counties, Ohio ..................5 3–1. Computed water-surface profiles for a bank-full discharge with Manning’s roughness coefficients in the main channel at current values and reduced by 5, 10, 15, and 20 percent on Chippewa Creek in Medina, Wayne, and Summit Counties, Ohio ....................................................................58 3–2. Computed water-surface profiles for a bankfull discharge with Manning’s roughness coefficients in the main channel at current values and reduced by 5, 10, 15, and 20 percent on River Styx in Medina and Wayne Counties, Ohio .....................................................................................70 3–3. Computed water-surface profiles for a bankfull discharge with Manning’s roughness coefficients in the main channel at current values and reduced by 5, 10, 15, and 20 percent on Little Chippewa Creek in Wayne County, Ohio .......................................................................76 iii
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Contents<br />
Abstract ...........................................................................................................................................................1<br />
Introduction.....................................................................................................................................................1<br />
Description of Study Area ...................................................................................................................4<br />
Flood-Control Modifications ...............................................................................................................4<br />
Purpose and Scope ..............................................................................................................................4<br />
Study Methods ...............................................................................................................................................6<br />
Data Collection ......................................................................................................................................6<br />
Hydrology ...............................................................................................................................................7<br />
Development of Water-Surface <strong>Profile</strong>s ...........................................................................................8<br />
<strong>Analyses</strong> of Open Channels ................................................................................................................8<br />
<strong>Analyses</strong> of Hydraulic Structures ....................................................................................................10<br />
Reduction of Roughness Coefficient Analysis ...............................................................................10<br />
Results of Hydraulic <strong>Analyses</strong> ...................................................................................................................10<br />
Summary .......................................................................................................................................................11<br />
References Cited..........................................................................................................................................11<br />
Appendix 1. Descriptions of Benchmarks ............................................................................................13<br />
Appendix 2. Selected Hydrologic Engineers Center’s River Analysis System Output<br />
<strong>for</strong> Chippewa Creek, Westfield Ditch, River Styx, and Little Chippewa Creek .........33<br />
Appendix 3. Computed Water-Surface Elevations <strong>for</strong> Chippewa Creek,<br />
River Styx, and Little Chippewa Creek ............................................................................57<br />
Figures<br />
1. Map depicting selected features of the Chippewa Creek basin<br />
in Medina, Wayne, Stark, and Summit Counties, Ohio. ..........................................................2<br />
2. Chippewa Creek looking upstream from Shorle Road. ..........................................................3<br />
3. Chippewa Creek looking upstream from abandoned railroad near mouth .........................3<br />
4. Map depicting selected features pertaining to the models of the<br />
Chippewa Creek basin in Medina, Wayne, Stark, and Summit Counties, Ohio ..................5<br />
3–1. Computed water-surface profiles <strong>for</strong> a bank-full discharge with<br />
Manning’s roughness coefficients in the main channel at current<br />
values and reduced by 5, 10, 15, and 20 percent on Chippewa Creek<br />
in Medina, Wayne, and Summit Counties, Ohio ....................................................................58<br />
3–2. Computed water-surface profiles <strong>for</strong> a bankfull discharge with<br />
Manning’s roughness coefficients in the main channel at current<br />
values and reduced by 5, 10, 15, and 20 percent on River Styx<br />
in Medina and Wayne Counties, Ohio .....................................................................................70<br />
3–3. Computed water-surface profiles <strong>for</strong> a bankfull discharge with<br />
Manning’s roughness coefficients in the main channel at current<br />
values and reduced by 5, 10, 15, and 20 percent on<br />
Little Chippewa Creek in Wayne County, Ohio .......................................................................76<br />
iii