FLOOD00150

• Designation Number: 579
• County: Gunnison
• Community: Marble and Vicinity
• Stream Name: Crystal River
• Title: Floodplain Information Report - Crystal River Technical Appendix
• Date: 8/1/2004
• Prepared For: CWCB
• Prepared By: Icon Engineering, Inc.
• Floodplain - Doc Type: Floodplain Report/Masterplan

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w.~. Elev eft)
Crltw.s. (ft)
E.G. slope (ft/ft)
Qletal (cfs)
TOp Width (ft)
vel Tetal (ft/s)
~iI.X ehl opth (ft)
Conv.Total(cfs)
Lengthwtd. (ft)
MiockEl (ft)
Alpha
Frctnloss(ft)
C 4. E LOSS eft)

warning:
Warning:
warning:
Warning:
warning:

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)
Flaw ~cfs)
Toplndth(ft)
Avg. veL (ft/s)
Hydr. [)e~th (ft)
Conv. Cds)
wetted Per. (ft!
shear (lb/sqft
stream power (1/ft s)
CumvolulJ\e(acre-ft)
Cum SA (acres)

BS.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

crystalRiver.rep
599.19 522.70
120.62 169.19
120.62 169.19
1137.46 578.37
32.93 135.87
9.43 3.42
3.66 1.25
11168.2 6167.2
H.93 136.86
2.00 0.67
18.84 2.31
61.12 36.84
16.26 22.18

The energyequlltion could nOt be balanced witllin the specified num berofiterations. The
prO!;Jr1lJll used cr-itical depth for the water surface and continued on with the calculations.
Oivlded flow computed for this cross-section.
The velocity head has chan~ed by more than 0.5 ft (0.1> m). This may indicate the need for
additional cross sections.
i~f s e~:?rn~~~~t:a~h~r~~~~r f~~a:d~; ~i!~afO~~o~~' s~~~~~~. the current and previous cross secti On.
~~~~h? ~g~ ~~f~~~~~e~t:~t~~e~~~~~~:. c:~:n b~~~ ~~f:e~ri~f~~l s~~~~~~ w~~i ~ef n~~~:t,~o t~~~ t~~:~e is
not a valid subcritical answer. Tile program defaulted to critical deptll.
CROSSSECTlONOUTPUT ProfilelFloodway

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~e~' H~~~v (m)
w.~. Elev (ft)
ent W.S. (ft)
E.G. SlopeCft/ft)
QTotal (cfs)
~~~ ~~~~~ HUs)
MaxehlDpth(ft)
conv.Total (cfs)
Length Wtd. (ft)
MinehEl (ft)
Alpha
FrctnLoss(ft)
e & E LOSS (ft)

warning:
warning:
warning:
warning:

7855.77
2.17
7853.60
7853.60
0.013158
2181.00
44.06
11.25
4.70
19013.7
587.53
7848.90
1.11
6.67
0.09

Element:
Wt. n-val.
Reach Len. (ft)
Flow Area (sq ft)
~~~: ?~1St)
Top width (ft)
Avg.vel.(ft/s)
Hydr.oepth(ft)
Conv. (cfs)
wettedPer.Cftl
shear (lb/sq h
stream power (l/fts)
eumvolu..e(acre-ft)
Cum SA, (acres)

LeftOB Channel
(1.035
535.21 599.U
152.83
152.83
1894.58
H.9)
12.40
4.64
16516.7
37.63
3.34
41.36
14.80 67.31
5.72 16.26

Rig~&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

The energy equation could not be balanced within the specif;ed num ber of iterations. The
program used critical depth for the water surface and continued on with the calcu1ations.
ig; ~~~~~)' sr~~~ o~a~agr~~t~~ ~~~~n~~g f~rM~~l~). dl:~~~e~h~h~r~~~~:~t d:~~h p~:~~~~:t~~~~s secti on.
This may lndicate the need for addit;onal cross sections.
During the standard step iterations. when the assumed water surhce was set equal to critical
depth. the calculated water surface came back below critical depth. This ind1cates that there is
not a valid subcritical answer. The prograJll defaulud to critical depth.

CROSS SECTION OUTPUT profilellO-year
~ef'H;l~v(m) 7853.44 Element LeftOB Channel Rig~~5gB
1.18 <<. n-val. 0.051 0.035
~~~t ~~~~ m~ 7852.26 ~each Len. (ft) 535.21 599.19 522.70
7852.26 Flow Area (sq ft) 110.24 1011.64 31.87
E.G. Slope (ft/ft) 0.011559 ~16: ~~~St) 80.24 108.64 124.26
QToul (cfs) 1657.00 415.10 1098.94 142.97
3~~ ~~~~~ m~5) 1112.89 ~~p. ~~f~ m~s~ 37.57 32.93 112.39
7.51 5.17 10.12 4.49
~~~v~h~o~~fh (~~~~ l.lS fly~r. Depth (ft 2.14 3.30 1.69
15412.4 ,onv. (cfs) 3861.0 10221.6 1329.8
Lengthwtd. (h) 582.10 Wetted Per. (ft~ 311.83 32.93 19.15
Min Ch El (ft) 7848.90 Shear (lb/sq ft 1.49 2.38 1.20
A,lpha 1.35 streampower(l/fts) 7.71 24.08 5.39
frctnLoss(ft) 6.52 cum volume (acre-h) 26.37 52.50 25.n
C & E LOSS (ft) 0.05 'lJI11SA(acres) 18.02 16.26 18.03

warning: The energy equation could not be balanced within the spe cifiednumberofiterations. The
warning: gi~~~~ ~f~~ ~~~~~i:~ 1~~t~hf~rc~~is~:~~~i~~~face and continued on with the calculations.
warn; ng: i~1 s e~:?rn~i~:t:a~h~r~:~~r f~~a~d~; ~i~~afO~~o~~' s~~~~~~~. the current and previ ous cross sect; on.
Warni ng: ~~~~h~ ~~: ~~i~~l~~e~t:~t~~e~~~~~~~. c~:n b~~~ ~~l~:e~r~~~~~ 1 sd~~~~~ w~~i ~efn~~~:~e;D t~~~ t~~:~e is
not a valid subcritical answer. The program defaulted to critical depth.
J Note,: Multiphcritical depths were found at this location. Thecrltical depth with the lowest, valid. water
surface was used.
_C~~S"">EQI9!!...9.l~ll.ULf.!:9m~~~ar
eef'H;~~v(~W 7855:~i ~~~m~~~al.
~~~t ~;~~ ~m mu~ ~r~~\~:~' (;:t~t)
~'~ot~j(l(~fgt/ft) 02g~~~6~ ~l~; ~~~srt)
TO~ width (ft) 196.60 TOP Width (ft)
~:x 2~fa6p~~tm) U~ ~~r.v6~j)t~f~m
conv.Total (cfs) 21781.4 cony. (cfs)
Lengthwtd. (ft) 576.31 wetted Per. (ft!
MinchEl (ft) 7848.90 Shear (lb/sqft
Alpha 1.71 streamPower(l/fts)
FrctnLoss(ft) 5.42 cum volume (acre-ft)
C&ELoss(h) 0.10 cum SA (acres)

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Warning:
warning:
warning:
warning:
Warning:

Left 08
0.051
535.21
90.27
90.27
434.71
38.07
4.82
2.37
4662.1
39.40
1.24
5.99
32.40
19.97

Channel
O.Oll
599.19
117.37
117.37
1084.16
32.93
9.24
3.56
11627.1
32.93
1.93
11.87
58.76
16.26

Rig~&sgB
522.70
156.46
156.46
512.12
125.60
3.ll
1.25
S492.2
126.56
0.67
2.20
33.44
21.28

The energy equation could not be balanced within the specified number of iterations. The
prograJll used critical depth for the water surface and continued on with the calculations.
Divlded flow computed for this cross-section.
The velocity head has changed by more than 0.5 ft (0.15m). This may indicate the need for
addit;onalcrosssections.
The ener9r los~ was greater than 1,0 ft (0.3 m). between the current and previous cross section.
This may lndicate the need foraddltional cross sections.
curing the standard step iterations. wl1en the assumed ':Ia~er surface was .se! egual to critical
depth, the calculated water surface came back below crnlcal depth. ThlS lndlcates that there is
not a valid subcritical answer. TheprograJlldefaultedtocriticaldepth.

CROSS SecCTiOH O\JTI'U1"
~~~. 1i~~~V ($i~)
w.s. Elev (ft)
critw.S. (ft)
E.G. slope (ft/ft)
QTotal (cfs)
~~~ ~~~~~ m}S)
MaxchlOpth(ft)
conv.Total (cfs)
Lenllthwtd. (ft)
MinchEl (ft)
Alpha

Profilell50Q-year

7853.72
0.91
7852.81
7852.81
0.009034
2515.00
232.17
5.91
L91
26460.0
574.48
71148.90
1.68

Element
wt..n-val.
Reach Len. (ft)
F10wArea(sqft)
Area (sq ft)
Flow ~cfs)
T<>pWldth(ft)
Avg.vel. (ft/s)
Hydr.oepth(ft)
cpnv. (cfs)
wetted Per. (ft!
shear (lb/"qft
screampower(l/fts)

LeftOB
0.0';1
535.21
101.26
101.26
532.19
38.61
5.26
2.62
5599.1
40.01
1.43
7.50

Channel
0.03';
599.19
126.81
126.81
1257.19
32.93
9.91
3.85
13226.8
32.93
2.17
21.53

Rig~&5gB
522.70
197.13
197.13
725.62
160.82
3.68
1.23
7634.2
161.85
0.69
2.53

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