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

warning: The energy equation could not be balanced within the specified number of iterations. The
warning: C~~?d~ ~f~: ~~~~~~:~ 1:~t~hf:rc~~:s~:;~~i~~~face and continued on with the calculations.
warning: The velocity healJ has changed by more than 0.5 ft (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 ,ndicate the need for additional cross sections.
warning: ~~~~~~ ~~: ~;f~~f~~e~t:~t~~e~~~}:~:" c::nb~~~ ~f:e~r~f~~lS~~~~~~ w~i:efn~1~:~e~o t~~~t~~:~e is
not a valid subcritical answer. The program defaulted to critical depth.
CROSS SECTION OUTPUT Prof; 1 e IFl Gadway

~er' H~~~v (~~p 785tU ~~m~~~al.

W.S. E1ev (ft) 7853.60 .each Len. (ft)
cr;t W.S. (ft) 7853.60 Flow Area (sq ft)
E.~. Slope (ft/ft) 0.013158 Area (sq ft)
Q Total (cfs) 2181.00 Flow ~cfs)
Top width (ft) 44.06 Tap Wldth (ft)
vel Total (ft/s) 11.25 Avg. vel. (ft/s)
Max chl Dpth (ft) 4.70 Hydr Depth (ft)
Conv. Total (cfs) 19013.7 conv: (cfs)
Length wtd. (ft) 587.53 wetted Per. (ft~
M;n ch El (ft) 7848.90 shear (lb/sq ft
Alpha 1.11 Stream Power (1 /ft s)
Fretn loss (ft) 6.67 ClII'I volume (acre-ft)
C & E Loss (ft) 0.09 Cum SA (acres)

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W.s. Elev (ft)
crit w.s. eft)
E.~. slol'<' (ft/ft)
Q Total (cfs)
TOp width (ft)
vel Total (ft/s)
Max Chl Dpth (ft)
Conv. Total (cfs)
Length wtd. (ft)
M; n ch El (ft)
Alpha
Fretn Loss (ft)
C &- E loss (ft)

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7852.62
7852 . 62
0.008738
2181. 00
207.06
5.68
3.72
23331. 7
575.59
7848.90
1.69
5.35
0.10

Reach Len. (ft)
Flow Area (sq ft)
Area (sq ft)
Flow (cfs)
Top wi dth (ft)
AVS' vel. (ft/s~

,~~n~: ~~m (ft

Wetted Per. (ft~
shear (1b/sq ft
stream Power (1 /ft s)
(l.1'li volume (acre-ft)
Cum SA (acres)

Left DB

535.21

535.21
94.03
94.03
465.17
38.26
4.95
2.46
4976.3
39.61
1.30
6.41
34.99
20.75

5~~~;a1R;V~~{;g
120.62 169.19
120.62 169.19
1137.46 578.37
32.93 135.87
9.43 3.42
3.66 1.25
12168.2 6187.2
32.93 136.86
2.00 0.67
18.84 2.31
61.12 36.84
16.26 22.18

14.80
5.72

chaRnel
0.035
599.19
152 . 83
152.83
1894. 58
32.93
12.40
4.64
16516.7
37.63
3.34
41. 36
67.31
16.26

';8~~5gB

522.70
41.10
41.10
286. 42
11.13
6.97
3.69
2497.0
14.06
2.40
16.73
11.18
5.04

warning: The energy equation could not be balanced within the specified number of itera'tions. The
program used critical depth for the water surface and continued on with the calculations.

::~~l ~g; ~~: ;~:;~:/t~~~ o:a~a~r~~t~~ ~~~~nt~g f~r~A~~l ~~. dC~:::~e~h~h;r~~~~:~t d:~~h p~:~~~:t~~:s sect; on.

This may lndicate the need for additional cross sections.
warning: During the standard step iterations. when the assumed water surface was set ~ual to critical
depth, the calculated water surface came back below critical depth.. This indlcates that there is
not a valid subcritical answdr. The program defaulted to critical depth.

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CROSS SECTION OUTPUT Profile "10-year
~er' H~~~v (~n> 7853.44 - Element Left DB channel R;8~~5gB
1.18 wt. n-val. 0.051 0.035
W. S. Elev ~ft~ 7852.26 Reach Len. (ft) 535.21 599.19 522. 70
crit W.S. ft 7852.26 Flow Area (sq ft) 80.24 108.64 31.87
E.G. Slope (ft/ft) 0.011559 Area ~s~ ft) 80.24 108.64 124.26
Q Total (cfs) 1657.00 Flow c s) 415.10 1098.94 142.97
TOf width ~ft) 182 . 89 Top wi dth ~ ft) 37.57 32.93 112.39
ve Total ft/s) 7.51 AVS' vel. ft/s~ 5.17 10.12 4.49
Max chl Dpth (ft~ 3.35 Hy r. Depth (ft 2.14 3.30 1.69
Conv. Tota 1 ~cfs 15412.4 Conv. (cfs) 3861. 0 10221. 6 1329.8
Length wt:d. ft) 582.10 Wetted Per. (ft~ 38.83 32.93 19.15
M;n ch El (ft) 7848.90 shear (1 b/sq ft 1.49 2.38 1.20
Alpha 1.35 Stream Power (1 1ft s) 7.71 24.08 5.39
Fret" loss ~ft~ 6.52 Cun volume (acre-ft) 26.37 52.50 25.71
c &, E Loss oft 0.05 Cum SA (acres) 18.02 16.26 18.03

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warni ng:
warn; ng:
warning:
warning:

The energy equation could not be balanced within the specified number of iterations. The
prolJram used critical depth for the water surface and continued on with the calculations.
Divlded flow computed for this cross-section.
Theenerg~ 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.
DuriM- the standard step iterations. when the assumed water surface was set ~ual to critical
depth. the calculated water surface came back below critical depth. This indlcates that there is

~~ftrpl:1~~i:i~~li~~~~~s a::~:rfou~~e a~r~~i:ml~~~~~~~~d ~he c~~n~~~ldd:~~h with the lowest, valid.
surface was used.

CROSS SECTION OUTPUT Profil e #SO-year
~er' H~~~v (m) 7853.35 - El ement Left OB Channel ';8~~5gB
0.83 Wt. n-val. 0.051 0.035
~~ft :~;~ ~fg 7852.52 Reach Len. (ft) 535.21 599.19 522.70
7852.52 Flow Area (sq ft) 90.27 117.37 156.46
E. G. slope (ft/ft) 0.008695 :1:: ~~~sjt) 90.27 117.37 156.46
Q Total (cfs) 2031. 00 434.71 1084.16 512.12
~~f ~~~~ m~S) 196 . 60 Tap wi dth ~ ft) 38.07 32.93 125.60
5.58 AVS' vel. ft/s~ 4.B2 9.24 3.27
Max ch 1 Opth (ft) 3.62 ~~n~: ~~,~~ (ft 2.37 3.56 1.25
Conv. Total ~Cfs) 21781. 4 4662.1 11627.1 5492 .2
Length wt:d. ft) 576.31 wetted Per. (ft~ 39.40 32.93 126.56
M; n ch El (ft) 7848.90 shear (lb/sq ft 1.24 1.93 0.67
Alpha 1.71 Stream Power (lIft s) 5.99 17.87 2.20
Frctn Loss ~ft~ 5.42 .Cum vol urne (acre-ft) 32.40 58.76 33.44
C&tEloss ft 0.10 .Cum SA (acres) 19.97 16.26 21. 28

The energy equation could not be balanc!!d within the specified number of iterations. The
program used critical depth for the water surface and continued on with the calculations.
oivlded flow computed for this cross-section.
The velocity heael has changed_ by more than 0.5 ft (0.15 m). This may indicate the need for
additional cross sections. -
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.
During 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 indlcates that there is
not a valid subcritical answer. The program defaulted to critical depth.

CROSS SECTION OUTPUT Profi 1 e #SOO-year

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Note:

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Warni ng:

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warning:
warning:

warning.:
warni og:

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~e r' H~~~v ($g)

W.S. E1ev (ft)
crit w.s. (ft)
E.G. slo~e (ft/ft)
Q Total (cfs)
Top wi dth (ft)
vel Total (ft/s)
Max ch 1 Dpth (ft)
Conv. Total (cfs)
Length wtd. (ft)
M; n ch El (ft)
Alpha

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7853.72
0.91
7852.81
7852.81
0.009034
2515.00
232.37
5.91
3.91
26460.0
574.48
7848.90
1.68

-Element
'Wt. n-val.
Reach Len. (ft)
-Flow Area (sq ft)
~~~: ~~Mt)

Tap width (ft)
Avg. vel. (fVs)
Hydr. Depth (ft)
Conv. (cfs)
,wetted Per. (ft)

~~~:~ (~~~~ m/ft s)

Left OB
0.051
535.21
101. 26
101.26
532.19
38.61
5.26
2.62
5599.1
40.01
1.43
7.50

water

C~~8;~ 1 Ri 3~~5gB

599.19 522.70
126.81 197.13
126.81 197.13
1257.19 725.62
32.93 160.82
9.91 3.68
3.85 1.23
13226.8 7634.2
32.93 161.85
2.17 0.69
21.53 2.53

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