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

8ank S ta: left Right lengths: left channel Right coeff Contr. crystal River. rep
Expan.
624.63 645.27 522.08 532.15 493.21 .1 .3
.Ineffective Flow nu"", 4
Sta L Sta R Elev Permanent
0 425 7933.57 T
425 544.93 7934.3 F
664.03 900 7934.18 F
900 2005.4 8000 T
CROSS SECTION OUTPUT Profile IIICO-year
~e~' H~~~v (m) 7934.46 el ement left 08 channel Ri t55g8
0.18 wt. n-Val. 0.050 0.035
w.s. Elev ~ft~ 7934.28 Reach Len. (ft) 522.08 532.15 493.21
Crit W.S. ft 7934.19 Flow Area (sq ft) 350.76 82.79 348.32
E.G. slope (ft/ft) 0.002926 Area ~s~ ft) 1501. 73 82.79 1659.75
Q Total (cfs) 1691. 00 Flow C 5) 523.77 479.95 687.28
TO~ wi dth ~ft) 1437.89 Top W1 dth (ft) 540.93 20.64 876.32
Ve Total ft/s) 2.16 AV9' vel. (ft/s~ 1.49 5.80 1.97
Max chl Dpth (ft~ 4.13 Hy r. Depth (ft 0.83 4.01 1.37
Conv. Tota 1 ~ cfs 31259.5 Conv. (cfs) 9682.3 8872.3 12704.9
length wtd. ft) 511.98 Wetted Per. (ft~ 423.27 20.64 256.16
Min ch El (ft) 7930.15 Shear (lb/sq ft 0.15 0.73 0.25
Alpha 2.53 Stream Power (lIft s) 0.23 4.25 0.49
Fretn Loss (ft~ 1.41 Cum volume (acre-ft) 89.52 89.03 69.85
c &0 E LoSS (ft 0.00 Cum SA (acres) 39.31 22.07 36.75

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warning:
warning:
Note:

Divided flow computed for this cross-section.
The energ\, loss was greater than 1.0 ft (0.3 m). be'tWeen the current and-previous cross section.
This may lndicate the need for additional cross sections.
Multiple critical depths were found at this location. The critical depth with the lowest. valid. water
surface was used.

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CROSS SECTION OUTPUT

~~~. H~~~v (m)

W.5. Eley (ft)
Crit w.S. (ft)
E.G. slope (ft/ft)
Q Total (cfs)
TOp width (ft)
Vel Total (ft/s)
..ax Ch1 Dpth (ft)
Conv. Tota' (cfs)
length wtd. (ft)
Mi n ch El (ft)
Alpha
Frctn LOSS; (ft)
C &. E losS (ft)

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Profile #F1oodway

7935.54 Element
0.32 wt. n-val.
7935.23 Reach len. (ft)
7934.41 Flow Area (sq ft)

o iggi~~g ~~: ~~Mt)

175.00 TOp width (ft)
3.51 Avg. vel. (ft/s)
5.08 Hydr. Depth (ft)
32677 . 5 Conv. (cfs)
519.30 wetted Per. (ft~
7930.15 shear (lb/sq ft
1. 66 Stream Power (1 1ft s)
1.44 Cum volume (acre-ft)
0.01 Cum SA (acres)

left OB
0.050
522 .08
366. 58
366.58
1005.34
149.63
2.74
2.45
19427.6
153.93
0.40
1.09
26.29
9.52

chonne 1
0.035
532.15
102.43
102.43
654.69
20.64
6.39
4.96
12651. 5
20.64
0.83
5.30
97.44
22.07

Ri g~55g8

493.21
13.32
13.32
30.97
4.13
2.32
2.82
598.4
7.17
0.31
0.72
22.20
8.04

::~~1~g; ~t: ~~~~~\' sV~~~o~~a~r~~t~~ ~~~~n~~g f;r~~~~l~~. dg~~e~hih;r~~~~:~t d:~ahp~:~~~:t~~::s section.
This may lndicate the need for additional cross sections.

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CROSS SECTION OUTPUT

~e~' H~~~V (m)

W.S. E1ev (ft)
crit W.S. (ft)
E.G. slope (ft/ft)
Q Total (cfs)
TOp wi dth (ft)
vel Total (ft/s)
Max Ch1 Dpth (ft)
Conv. Total (cfs)
Length wtd. (ft)
..in ch E1 (ft)
Alpha
Frctn loss (fftt)
C & E Loss { }

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Profi 1 e tilO-year

7934.32 Element
0.13 wt. n-val.
7934.19 Reach Len. (ft)
7934.19 Flow Area (sq ft)
0.002079 Area (sq ft)
1284.00 Flow (cfs)
1416.83 TOp width (ft)
1.78 Avg. vel. (ft/s)
4.04 Hydr. Depth (ft)
28163.4 Conv. (cfs)
512.24 wetted Per. (ft)

791U~ ~~~:~ (~~~~~ m/ft s)
1.12 Cum volume (acre-ft)
0.00 Cum SA (acres)

left: OB
0.050
522.08
314.03
1454.63
375.24
536.98
1.19
0.75
8230.5
420.83
0.10
0.12
68.79
35.88

channel
0.035
532.15
80.98
80.98
389.92
20.64
4.81
3.92
8552.5
20.64
0.51
2.45
75.29
22.07

Ri g~55gB

493.21
326.05
1583.91
518.85
859.21
1.59
1.28
11380.4
256.16
0.17
0.26
51.08
30.39

warning:
warning:
warning:
warning:

The energy equation could not be balanced within the specified number of iterations. The
pr09ram used- critical depth for the water surface and continued on with the calculations.
Divlded flow computed for this cross-section.
~t~s e~:;grn~~~:t:a~h~r~:~dr f~~a~dai~i:~afO~~o:~' s:~~~~. the current and previous cross section.
During the standard step iterations. when the assl8IIed water surface was set e9ual to critical
depth, the calculated water surface came back below crit.ical dept.h. This indlcates that there is
~~f t~ pl: 1 ~~i ~~~~~i ~~~~~s a~~~:r fou~~e a~r~~f:m l~~~~~~~~d ~ge c~~f~~~~ 1 dd~~~h wi th the lowest, valid. water
surface was used.

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Note:

CROSS SECTION OUTPUT Profile #SO-year
~e~'H~~~v(m) 7934.39 El ement left OB channel Ri g~55gB
0.20 wt. n-Va 1. 0.050 0.035
W.s. Elev (ft~ 7934.19 Reach Len, (ft) 522.08 532.15 493.21
crit w.s. (ft 7934.19 Flow Area (sq ft) 314.03 80.98 326.05
E.G. slope (ft/ft) 0.003127 Area ~s~ ft) 1454.63 80.98 1583.91
Q Total (cfs) 1575.00 Flow c s) 460.28 478.28 636.44
~~~ ~~~~ ~mS) 1416.83 TOp wi dth (ft) 536.98 20.64 859.21
2.18 AV9' vel. (ft/s~ 1.47 5.91 1.95
..ax Ch 1 Dpth (ft~ 4.04 Hy r. oepth (ft 0.75 3.92 1.28
Conv, Total (cfs 28163.4 ConY. (cfs) 8230. 5 8552.5 11380.4
Length wtd. (ft) 512'.11 wetted Per. (ft) 420.83 20.64 256.16
..in ch El (ft) 7930.15 ~~~:~ (~~,:~ ~fl/ft s) 0.15 0.77 0.25
Alpha 2.67 0.21 4.52 0.49
Frctn Loss (ft) 1.44 Cum volume (acre-ft) 83.31 85.20 63.75
c & E loss (ft) 0.00 Cum SA (acres) 38.31 22.07 35.15

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warni ng:
warni ng:
warni ng:

Divided flow computed for this cross-section.
The energ~ loss was gr.eater than 1.0 ft (0.3 m). between the current and previous cross section.
This may lndicate the need for additional cross sections.
During the standard step iterations. when the assumed water surface was set egual to critical
depth, the calculated water surface came back below critical depth. This indlcates that there is

:~f tf p l: 1 ~~i ~~~~fi ~~~~~s a~~:r fou~~e a~r~g~:m l~~:~~~~~d ~~e c~~f~~~~ 1 d~~~~h wi th the lowest, valid I water
surface was used.

Note:

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CROSS SECTION OUTPUT Profile #~OO-year

~e~' H~~~v (m)

W.S. Elev (ft)
crit w.s. (ft)
E.G. slope (ft/ft)
Q Toto 1 (cfs)
TOp wi dth (ft)
vel Total (ft/s)
Max ch 1 Dpth (ft)
Conv. Total (cfs)
Length wtd. (ft)
Mi n ch El (ft)

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7934" 50
0.11
7934,.39
7934.19
0.002020
1950.00
1460.88
1.82
4.24
43388.2
512'.69
7930.15

El ement
wt. n-val.
Reach Len. (ft)
Flow Area (sq ft)

~~: ~~Mt)

TOp wi dth (ft)
Avg. vel. (ft/s)
Hydr. Depth (ft)
Cony. (cfs)
wetted Per. eft)
shear (lb/sq ft)

left 08
0.050
522.08
611.39
1562.07
882.07
542.29
1.44
1.13
19626.4
545.21
0.14

CS~3~~1 Rig~55g8
532.15 493.21
85.08 376.67
85.08 1758.52
417.37 650.56
20.64 897.95
4.91 1.73
4.12 1.48
9286.5 14475.2
20.64 256.16
0.52 0.19
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