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Stream-Profile Analyses Using a Step-Backwater Model for ... - USGS

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Appendix 3 73<br />

Table 3–2. Water-surface elevation, in feet, along River Styx after decreasing the Manning’s roughness coefficient (n) <strong>for</strong> the<br />

main channel by 5, 10, 15, and 20 percent.—Continued<br />

River<br />

station 1<br />

17708<br />

17786<br />

17801<br />

17844<br />

18295<br />

18683<br />

19052<br />

19290<br />

19623<br />

19909<br />

20184<br />

20478<br />

20521<br />

20573<br />

20648<br />

20843<br />

21164<br />

21395<br />

21718<br />

21779<br />

21805<br />

21858<br />

22235<br />

22504<br />

22805<br />

23068<br />

23466<br />

23937<br />

24408<br />

24747<br />

25107<br />

25507<br />

25771<br />

26148<br />

26554<br />

26830<br />

27240<br />

27268<br />

27341<br />

27375<br />

27585<br />

27996<br />

Water-surface elevation (in feet) associated with the indicated decrease in the Manning’s roughness coefficient (n)<br />

over the entire length of the main channel<br />

0 percent 5 percent 10 percent 15 percent 20 percent<br />

958.71<br />

958.5<br />

958.37<br />

958.15<br />

957.96<br />

958.79<br />

958.58<br />

958.46<br />

958.25<br />

958.07<br />

959.49<br />

959.39<br />

959.33<br />

959.27<br />

959.23<br />

959.52<br />

959.41<br />

959.34<br />

959.27<br />

959.23<br />

959.7<br />

959.59<br />

959.53<br />

959.46<br />

959.41<br />

959.84<br />

959.72<br />

959.66<br />

959.58<br />

959.52<br />

960<br />

959.89<br />

959.83<br />

959.74<br />

959.67<br />

960.06<br />

959.94<br />

959.88<br />

959.79<br />

959.71<br />

960.11<br />

959.99<br />

959.93<br />

959.83<br />

959.75<br />

960.19<br />

960.06<br />

960<br />

959.89<br />

959.81<br />

960.27<br />

960.14<br />

960.07<br />

959.95<br />

959.86<br />

960.47<br />

960.34<br />

960.26<br />

960.14<br />

960.03<br />

960.57<br />

960.44<br />

960.37<br />

960.25<br />

960.14<br />

960.58<br />

960.45<br />

960.38<br />

960.26<br />

960.15<br />

960.58<br />

960.44<br />

960.37<br />

960.25<br />

960.14<br />

960.66<br />

960.52<br />

960.44<br />

960.32<br />

960.2<br />

960.78<br />

960.65<br />

960.56<br />

960.43<br />

960.31<br />

960.83<br />

960.7<br />

960.61<br />

960.49<br />

960.36<br />

960.95<br />

960.82<br />

960.73<br />

960.61<br />

960.49<br />

960.95<br />

960.82<br />

960.73<br />

960.61<br />

960.49<br />

961.07<br />

960.94<br />

960.85<br />

960.73<br />

960.61<br />

961.16<br />

961.03<br />

960.95<br />

960.83<br />

960.72<br />

961.27<br />

961.14<br />

961.06<br />

960.93<br />

960.83<br />

961.39<br />

961.26<br />

961.18<br />

961.05<br />

960.95<br />

961.49<br />

961.36<br />

961.28<br />

961.15<br />

961.04<br />

961.59<br />

961.45<br />

961.37<br />

961.23<br />

961.12<br />

961.89<br />

961.75<br />

961.67<br />

961.52<br />

961.42<br />

962.42<br />

962.31<br />

962.25<br />

962.12<br />

962.02<br />

963<br />

962.92<br />

962.88<br />

962.77<br />

962.67<br />

963.44<br />

963.35<br />

963.31<br />

963.2<br />

963.09<br />

963.72<br />

963.64<br />

963.61<br />

963.52<br />

963.43<br />

963.97<br />

963.9<br />

963.86<br />

963.78<br />

963.69<br />

964.32<br />

964.24<br />

964.19<br />

964.09<br />

963.98<br />

964.65<br />

964.61<br />

964.58<br />

964.51<br />

964.42<br />

964.93<br />

964.88<br />

964.85<br />

964.78<br />

964.69<br />

965.06<br />

965.01<br />

964.97<br />

964.9<br />

964.82<br />

965.35<br />

965.28<br />

965.22<br />

965.14<br />

965.04<br />

965.35<br />

965.27<br />

965.2<br />

965.12<br />

965.01<br />

965.84<br />

965.73<br />

965.64<br />

965.54<br />

965.42<br />

965.94<br />

965.86<br />

965.78<br />

965.7<br />

965.62<br />

966.44<br />

966.33<br />

966.24<br />

966.13<br />

966.02<br />

967.1<br />

966.97<br />

966.88<br />

966.75<br />

966.6

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