FLOOD10515

• 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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W.s. Elev (ft)
crit w.s. (ft)
E.G. Slo~e (ft/ft)
Q Total (cfs)
TOp wi dth (ft)
Vel Total (ft/s)
Max Chl Dpth (ft)
ConY. Total (cfs)
length'wtd. (ft)
Mi n ch El (ft)
Alpha
Fretn Loss (fftt)
C&ELOSS( )

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]925.58
7925.58
0.009842
1657.00
38.00
10.64
5.66
16702.8
476.07
7919.92
1.30
4.98
0.34

Reach len. (ft)
Flow Area (sq ft)
~~~: ~~~sr)

Tap W1 dth (ft)
Avg. vel. (ft/s)
Hydr. oe~th (ft)
Conv. (cfs)
wetted Per. (ft~
shear (lb/sQ ft
Stream Power (lIft 5)
Cum Va I urne (acre-ft)
Cum SA (acres)

466.19
18.57
18.57
73.28
7.78
3.95
2.39
738.6
9.13
1.25
4.93
30.62
20.17

crystalRiver.rep
475.10 491.64
119.96 17.25
119.96 17.25
1516.63 67.09
23.00 7.22
12.64 3.89
5.22 2.39
15287.9 676.3
23.07 8.66
3.20 1.22
40.40 4.76
63.87 29.68
19.29 20.20

Warning: The energy equation could not be balanced within the specified m.nber of iterat.ions. The
program used critical depth for the water surface and continued on with the calculations.
warning: The velocity head has changed by more than O.S ft (0.15 m). This may indicate the need for
additional cross sections.
warning: ~~~s e~:~grn~~~:t:a~h~r~:~~r f~~a~d~i~i:~afO~~o:~. s:~~:~~. the current and previous cross section.
Warning: ~:~~~~ ~~: ~~f~~f~~e~t:~t~~e~~~}:~:. c=nb~~~ ~':e~r7~f~~ls~~:~~~ ~i~ef~~::e~o t~~~t~~:~e is
not a valid subcritical answer. The program defaulted to critical depth.
CROSS SECTION OUTPUT Profile 150-year

~.;~. H~~av (m) 7928.85 Element left OB channel Ri 8~~6gB
2.54 wt. n-val. 0.060 0.035
W.S. Elev ~ft~ 7926.30 Reach len. (ft) 466.19 475.10 491.64
crit W.S. ft 7926.30 Flow Area (sq ft) 24.67 136.71 22.91
E.G. Slope (ft/ft) 0.009289 Area ~s~ ft) 24.67 136.71 22.91
Q Total (cfs) 2031.00 Flow c s) 103.93 1831.92 95.15
~~f t.~;~ ~mS) 40.29 Tap W1 dth ~ ft) 8.96 23.00 8.32
11.02 AV9' vel. ft/s~ 4.21 13.40 4.15
Max chI Dpth (ft~ 6.38 ~n~: ~~~~~ (ft 2.75 5.94 2.75
Conv. Total fcfs 21073.0 1078.3 19007.4 987.3
lengthwtd. ft) 476.14 wetted Per. (ft~ 10.52 23.07 9.98
Min ch El (ft) 7919. 92 shear (lb/sq ft 1.36 3.44 1.33
Alpha 1.35 Stream Power (1 1ft s) 5.73 46.05 5.53
Fret" LOSS. ~ft~ 4.71 Cum Vo 1 urne (acre-ft) 37.48 71.50 38.30
C&ELOSS f't 0.38 Cum SA (acres) 22.25 19.29 23.62

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warning: The energy equation could not be balanced wi'thin the specified number of iteratioRS. The
program used critical depth for the water surface and continued on with the calculations.
warning: The velocity head has changed by more than 0.-5 f1: (0.15 m). This may indicate the need for
additional cross sections.
warning: The energ~ loss was greater than 1.0 ft (0.3 m). between the current and previous cross section.
This may lndicate the need for additional. cross sections.
warning: DuriM the standard step iterations. when the assumed water surface was set equal to critical
depth. the calculated water surface came back below critical depth. This imhcates that there is
not a valid subcritical answer. The program defaulted to critical depth.

CROSS SECTION OUTPUT Profi 1 e #500-year

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~.;~. H~~av (~n> 7930.00 E1 ement Left OB Channel R;8~~6gB
2.87 wt. n-VaL 0.060 0.035
W.S. Elev ~ft~ 7927.13 Reach len. (ft) 466.19 475.10 491.64
crit W.S. ft 7927.13 Flow Area (sq ft) 32.59 155.62 30.27
E.G. Slope (ft/ft) 0.008951 Area ~s1 ft) 32.59 155.62 30.27
Q Total (cfs) 2515.00 Flow c s) 147.89 2231.71 135.40
TOf width ~ft) 42.87 Tap W1dth ~ft) 10.30 23.00 9.57
Ve Total ft/s) 11.51 AV9' vel. ft/S~ 4.54 14.34 4.47
Max chI Dpth (ft~ 7.21 My r. De~th (ft 3.16 6.77 3.16
Conv. Total fcfs 26583.3 Conv. (cfs) 1563.1 23588.9 1431.2
length Wtd. ft) 476.17 wetted Per. (ft~ 12.09 23.07 11.47
Min ch El (ft) 7919.92 Shear (lb/sq ft 1.51 3.77 1.47
Alpha 1. 39 Stream Power (lb/ft s) 6.84 54.06 6.60
Frctn Loss ~ft) 4.36 Cum volume (acre-ft) 47.81 80.83 50.44
C&ELOSS ft) 0.50 Cum SA (acres) 27.07 19.29 27.77

The energy equation could not be balanced within the specified number of iterations. The
program used critical depth for the water surface and continued on with the calculations.
The ve 1 aci ty head has changed by more than O. 5 ft (0.15 m). Thi s may i ndi cate the need for
additional cross sections.
i~ts e~:~gln~~~:t:a~h~r~:~~r f~~a~d~i~i~~afO~~o~~. s:~~::~. the 'current and previous cross section.
During the. standard step iterationsi when the asSlned water surface was set equal to critical
depth, the calculated water surface came back below crit.ical depth. This indlcates that there is
not a valid subcritical answer. The program defaulted to critical dep'th.
CROSS SECTION

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warni ng:

warning:

Warning:

Warn; ng:

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RIVER: cr.ystal
REACH: Marble

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RS: 18067

INPUT
oescription:
Station Elevation Data nuffis
Sta El ev Sta El ev
07950.32 8.877946.63
24.5 7939.41 29.897936.64
71.02 7931.59 79.71 7930.41
106.517927.39 107.297927.31
117.567924.18 119.95 7923.85
149.15 7920.92 168.887919.57
191.02 7918.79 192.47 7918.73
205.71 7914.25 236.3 7914.25
249.437916.62 252.847918.36
278.987932.52 282.92 7934.83
298.76 7935.27 303.44 7935.09
338.02 7934.16 339.75 7934.11
369.297936.38 370.587936.59
385.65 7941.42 387.68 7941. 43
428.547941.22 438.547941.15
499.75 7941.09 508.54 7941.07
527.79 7945.25 530.687945.94
540.167946.59 546.31 7947.74

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Manning's n Values
Sta n val sta
o .06 192.47

Bank Sta:' Left
205.71

89
Sta E1ev
9.85 7946.25
44.98 7935.37
95.48 7928.81
108.41 7926.96
131. 79 7923.11
174.52 7919.31
194.53 7918.01
239.25 7914.74
254.517919.25
284.5 7935.76
305.417935.01
351.74 7934.23
378.71 7938.87
389.75 7941. 4
448.54 7941.03
521. 39 7940;88
531.43 7946.34
549.89 7948.09

Sta Elev
10.26 7946.05
46.55 7935.17
96.22 7928.72
112.45 7925.66
133.11 7922.94
181.11 7918.99
201.24 7915.65
242.28 7915.26
266.74 7925.8
287.02 7935.68
315.68 7934.55
359.12 7934.19
379.57 7939.08
398.547941.33
479.75 7941.03
521.47 7940.94
534.1 7946.47
561:52 7948.78

num= 5
n val Sta n val Sta
.05 205.71 .035 236.3

~~~~~

Lengths: Left Channel Right
658.53 592.77 538.05

CROSS SECTION OUTPUT Profi 1 e 'lOO-year

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~.; ~. H~~av (~n>

w.s. Elev (ft)
crit w.s. (ft)
E.G. slo~e (ft/ft)
Q Total (cfs)
TOp width (ft)
vel Total (ft/s)

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7920.70
1.79
7918.91
7918.91
0.009905
2181. 00
69.96
9.58

Element
wt. n-val.
Reach Len. (ft)
Flow Area (sq ft)
Area (sq ft)
Flow (cfs)
Tap wi dth (ft)
Avg. vel. (ft/s)

n val Sta
.05 249.43

coeff Contr.
.1

Left OB
0.050
658.53
33.52
33.52
172.22
21. 80
5.14

Sta Elev
22.08 7940.71
50.28 7934.64
97.07 7928.63
115.87 7924.58
144.41 7921. 31
183.88 7918.91
204.44 7914.6
246.55 7915.97
270.68 7927.97
291.21 7935.54
322.77 7934.33
360.55 7934.49
382.91 7940.29
408.54 7941.22
488.54 7941.09
524.19 7944.24
537.767946.56

n val
.06

Expan.
.3

c~~3~f Ri8~~5gB
592.77 538.05
142.54 51.59
142.54 51.59
1680.21 328.57
30.59 17.57
11.79 6.37
Page 24