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Last modified
1/26/2010 10:24:01 AM
Creation date
6/17/2008 2:35:59 PM
Metadata
Fields
Template:
Floodplain Documents
County
Gunnison
Community
Marble and Vicinity
Stream Name
Crystal River
Basin
Gunnison
Title
Floodplain Information Report Crystal River - Technical Appendix
Date
5/1/2004
Prepared For
Marble and CWCB
Prepared By
ICON Engineering, Inc.
Floodplain - Doc Type
Floodplain Report/Masterplan
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<br />I <br /> <br />I <br /> <br />TOp wi dth (ft) <br />vel Total (ft/s) <br />Nax ch 1 Dpth (ft) <br />Conv. Total (cfs) <br />Length Wtd. (ft) <br />N;n ch El (ft) <br />Alpha <br />Fretn Loss (fftt) <br />C&ELoSS( ) <br /> <br />98.52 <br />6.93 <br />3.89 <br />15953.2 <br />349.67 <br />7944.33 <br />1.42 <br />1.37 <br />0.12 <br /> <br />Top wi dth (ft) <br />Avg. vel. (ft/s) <br />Hydr. Depth (ft) <br />Conv. (cfs) <br />wetted Per. (ft~ <br />shear (lb/sq ft <br />Stream Power (1 1ft s) <br />Cum Vo 1 line (acre-ft) <br />Cum SA (acres) <br /> <br />~2'i;alRive7{3~ <br /> <br />9.99 4.84 <br />3.79 2.00 <br />9347.9 6605.3 <br />30.00 75.94 <br />2.32 1.34 <br />23.16 6.47 <br />110.87 23.28 <br />26.16 8.55 <br /> <br />I <br /> <br />30.45 <br />12.20 <br /> <br />I <br /> <br />Warning: <br />warning: <br />warning: <br />warning: <br /> <br />The energy equation could not be balanced within the specified number of iterations. The <br />program used critical depth for the water surface and continued on with the calculat.ions. <br />The conveyance ratio (upstream conveyance divided by downstream conveyance) ;s les5 than <br />0.7 or greater than 1.4. This may indicate the need for additional cross sections. <br />~~f s e~:~g~ n~~~:t:a~h~r~:~~r_f~~a~d~i ~i :~a fO ~~o:~ . s=~~~~. the curr~nt and previ DUS cross sect; on. <br />During the standard step iterations. when the assumed water surface was set ~ual to critical <br />depth. the calculated water surface came back below critical depth. This indlcates that there is <br />not a valid subcritical answer. The prograJI defaulted to critical depth. <br />The I?arabolic search method failed to converge on critical depth. The program will try the cross <br />sectlon slice/secant method to find critical depth. <br /> <br />warni og: <br /> <br />I <br /> <br />CROSS SECTION OUTPUT Profile #lO-year <br />~;,~. H:~~v (~i5) 7948.41 El ement Left OB channel R;8~~5g8 <br />1.B wt. n-val. 0.060 0.035 <br />W.S. Elev ~ft~ 7947.09 Reach Len. (ft) 321. 73 345 .98 365. 58 <br />crit w.s. ft 7947.09 Flow Area (sq ft) 19.19 69.51 81.66 <br />E.G. slo~e (ft/ft) 0.018770 Area ~s? ft) 19.19 69.51 81. 66 <br />Q Total (cfs) 1284.00 Flow c s) 82.25 775.34 426.40 <br />TOf width ~ft) 95.54 Tap Wi dth ~ft) 13.24 26.17 56.13 <br />Ve Total ft/s) 7.54 AV~. vel. ft/s~ 4.29 11.15 5.22 <br />Nax ChI Dpth (ft~ 2.75 Hy r. Depth (ft 1.45 2.66 1.45 <br />Conv. Tota 1 ~ cfs 9372.0 Conv. (cfs) 600.4 5659.3 3112.4 <br />Length Wtd. ft) 348.15 wetted Per. (ft~ 13.52 26.18 56.89 <br />N;n ch El (ft) 7944. B shear (lb/sq ft 1.66 3.ll 1.68 <br />Alpha 1.50 Stream Power (lIft s) 7.13 34.71 8.78 <br />Fretn loss m~ 1.45 Cum volune (acre-ft) 81.05 85.35 153.94 <br />carE loss 0.25 Cum SA (acres) 43.71 26.16 59.78 <br /> <br />I <br /> <br />I <br /> <br />warni n9: <br /> <br />warning: <br />Warning: <br /> <br />Warni ng: <br /> <br />warni ng: <br /> <br />warni n9: <br /> <br />The energy equation could not -be balanced within the specified number of iterations. The <br />pr09ram used critical depth for the water surface and continued on with the calculations. <br />oivlded flow comp-uted for this cross-section. <br />The velocity head has changed by more than 0.5 ft (0.15 m). This may indicate the need for <br />additional cross sections. <br />The conveyance ratio (upstream conveyance divided by. dowostreUl conveyance) is less than <br />0.7 or greater than 1.4. This may indicate the neeif for additional cross sections. <br />The energ~ loss was greater than 1.0 ft (0.3 m). between the current and previous cross section. <br />This may lndicate the need for additional cross sections. <br /> <br />~~~~~~ ~~: ~;f~~~~~e~t:~t~~e~~~}:~:. c::nb~~: ::t:e~r1~l~~ls~~~~~ W;~i:efn~?~:~e~O t~~~t~~:~e is <br />not a valid subcritical answer. The program defaulted to critical depth. <br /> <br />I <br /> <br />I <br /> <br />CROSS SECTION OUTPUT Profile ISO-year <br />~;'~'H:~~v(m) 7948.79 El ement Left OB channel R;8~M8 <br />0.92 Wt. n-val. 0.060 0.035 <br />w.S. Elev ~ft~ 7947.87 Reach Len. (ft) 321.73 345.98 365.58 <br />crit W.S. ft 7947.87 Flow Area (sq ft) 47.99 90.05 139.93 <br />E.G. Slope (ft/ft) 0.010051 Area ~s? ft) 48.97 90.05 139.93 <br />Q Total (cfs) 1575.00 Flow c s) 105. 30 873. 39 596.31 <br />TOf width ~ft) 173.05 Top Wi dth ~ft) 61.50 26.17 85.38 <br />Ve Totalft/s) 5.67 AV~. vel. ft/s~ 2.19 9.70 4.26 <br />Max chl Dpth (ft~ 3.54 Hy r. oe~th (ft 0.83 3.44 1.64 <br />Conv. . Tota 1 ~cfs 15710.2 Conv. (cfs) 1050.4 8711.9 5948.0 <br />Length Wtd. ft) 348. 54 wetted Per. (ft~ 57.77 26.18 86.40 <br />M;n ch El (ft) 7944. B shear (lb/sq ft 0.52 2.16 1.02 <br />Alpha 1.85 Stream Power (1 /ft s) 1.14 20.94 4.33 <br />Fretn loss (ft~ 1.36 Cum volume (acre-ft) 97.30 96.62 175.12 <br />C&ELOSS (ft 0.09 Cum SA (acres) 47.89 26.16 65.02 <br /> <br />I <br /> <br />I <br /> <br />warni ng: <br /> <br />warni ng: <br />warni ng: <br /> <br />warning: <br /> <br />warni ng: <br /> <br />The energy equation could not be balanced within the specified number of iterations. The <br />proqram used critical depth for the water surface and continued on with the calculations. <br />oivlded flow computed for this cross-section. <br />The conveyance ratio (upstream conveyance divided by downstream conveyance) is less than <br />0.7 or greater than 1.4. This may indicate the neeCl for additional cross sections. <br />~~is e~:~gfn~~~:t:a~h~r~:~ar f~~a~d~H~i~~a~O~~o~~' s~~~:~~. the current and previous cross section. <br />During the standard step iterations, when the assumed water surface was set e9ual to critical <br />depth. the calculated water surface came back below critical depth. This indlcates that there is <br />not a valid subcritical answer. The program defaulted to critical depth. <br /> <br />I <br /> <br />CROSS SECTION OUTPUT Profil e #SOO-year <br />~;,~. H:~~v (~i5) 7949.17 Element Left OB channel Ri g~~5~B <br />0.91 Wt. n-val. 0.060 0.035 <br />w.~. Elev ~ft~ 7948.26 Reach Len. (ft) 321. 73 345.98 365.58 <br />Crlt W.S. ft 7948.26 Flow Area (sq. ft) 71.19 100.29 174.01 <br />E.G. slo~e (ft/ft) 0.009132 ~~~: ~~Mt) 74.36 100.29 174.01 <br />Q Total (cfs) 1950.00 186.01 996. B 767.66 <br />~~f ~~~~ ~mS) 182.34 Tap WIdth ~ft) 68.17 26.17 88.00 <br />5.64 AV~. vel. ft/s~ 2.61 9.93 4.41 <br />Max chl Opth (ft~ 3.93 Hy r. De~th (ft 1.17 3.83 1.98 <br />Conv. Total (cfs 20406.1 Conv. (cfs) 1946.5 10426. 3 80B.3 <br />Length Wtd. (ft) 348.28 wetted Per. (ft) 61. 37 26.18 89.07 <br />Nin ch El (ft) 7944.33 ~~~:~ (~~~~~ m/ft s) 0.66 2.18 1.11 <br />Alpha 1.84 1. 73 21. 70 4.91 <br />Frctn Loss (ft~ 1.41 Cum volume (acre-ft) 119.29 109.15 201.90 <br />c & E LOSS (ft 0.04 Cum SA (acres) 52.74 26.16 71.15 <br /> <br />I <br /> <br />I <br /> <br />I <br /> <br />warning: <br />warning: <br />warni ng: <br />warning: <br />warning: <br /> <br />The energy equation could not be balanced within the specified number of iterations. The <br />pr09ram used critical depth for the water surface and continued on with the calculations. <br />oivlded flow computed for this cross-section. <br />The conveyance ratio (upstream conveyance divided by downstream conveyance) is less than <br />0.7 or greater than 1.4. This may indicate the nee~ for additional cross sections. <br />i~~ s e~:~gln~~~:t:a~h~r~:~~r f~~a~dai~i ~~afO~~o~~' s~~tf::~. the current and previ ous cross secti-on. <br />During the standard step iterations, when the assumed water surface was set e9ual to critical <br />depth. the calculated water surface came back below critical depth. This tndlcates that there is <br />not a valid subcritical answer. The program defaulted to critical depth. <br /> <br />I <br /> <br />CROSS SECTION <br /> <br />RIVER : crystal <br />REACH: Marb 1 e <br /> <br />RS: 23230 <br /> <br />I <br /> <br />INPUT <br />Descri pti on: <br />Station Elevation Data num- <br />Sta El ev Sta El ev <br />07968.74 4.747968.51 <br />21.75 7967.17 34.67 7966.31 <br />63.6 7964.37 64.46 7964.31 <br />91.9 7962.27 107.89 7961.01 <br /> <br />155 <br />Sta Elev <br />7.34 7968.33 <br />35.92 7966.22 <br />75.01 7963.6 <br />n7.47960.31 <br /> <br />Sta El ev <br />14.977967.78 <br />46.28 7965.53 <br />76.76 7963.47 <br />123.247959.85 <br /> <br />Sta Elev <br />20.23 7967.31 <br />48.447965.38 <br />89.57 7962.45 <br />131.14 7959.27 <br /> <br />I <br /> <br />page 4 <br /> <br />I <br />
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