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

CrystalRiver.rep
ee~' H~~~v (?g) 7960.26 Element Left 011 channel Rig~~6gl1
1.77 "" n-val. 0.060 0.035
w.~. Elev (ft~ 7958.50 Reach Len. (ft) 773.34 831.57 855.60
CrHW.S. (ft 7958.50 Flow Area. (sq ft) H.05 97.74 63.55
E.G. slope (ft/ft) 0.009375 Area ~s~ ft) B.05 97.74 63.55
Q Total (cfs) 1575.00 Flow c s) 140.11 1181.63 253.26
~~~ ~~~~~ m~s) 61.71 Tap width ~ft) 13.13 19.38 29.20
8.10 AV3' Vel. ft/S~ 4.24 12.09 3.99
Max chl Opth eft~ 5.05 Hyr.oepth(ft 2.52 5.04 2.18
cony. Tota 1 ~c:fs 16266.8 COnY. (cfs) 1447.1 12204.0 2615.7
Length Wtd. ft) 833.51 wetted Per. (ft) 14.06 19.38 29.66
MinChEl(ft) 7953.44 ~~~:~ (~~~~~ mlft 5) 1.38 2.95 1.Z5
Alpha 1.73 5.83 35.68 5.00
Fn::'tl'l Loss ~i:l 8.09 cum vo)ume (acre-h) 98.03 98.41 177.12
C&ELoss 0.25 cum SA (acres) 48.55 26.60 66.15

warning: The energy equation could not be balanc:ed within the specified number of iterations. 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 ft (0.15 01). This may indicate the need for
additional cross sections.
warni ng: i~~ s e~=~grn~~~:t:a~h~r~:~~r f~~a~d~; ~i :~a fO c~o~~' s~~ii6~~. the current and previ ous cross sect; on.
warning: During the standard step iterations. when the assllll1ed water surface was set e<jual to critical
depth. the ca1culated water surface caine back below critical depth. This indlcates that there is
not a valid subcritical answer. The program defaulted to critical depth.
CROSS SECTION OUTPUT profilelSOO-year
7961.05 Element
1.94 \fit. n-val.
7959.10 Reach Len. (ft)
7959.10 Flow Area (5q ft)
0.00913> Area (Sj'"
1950.00 Flow ~c s)
67.94 T<>p wldth (ft)
8.34 AVIl.vel. (ft/s)
5.66 Hydr. Oepth (ft)
20402.8 cony. (cfs)
7~]~:~~ ~~~;~d (~~/sq em
1.80 Stream power (lbjfts)
7.61 cumvolulle(acre-ft)
O.ll cum SA (acres)

I

I

I

I

I

I

ee~'H~~~v(m)
w.~. E1ev (ft)
crHW.S. (ft)
E. G. slop~ (ft/ft)
QTotill (cfs)
~~~ ~~~~~ m~s)
MaxChl Opth (ft)
conv.Total (cfs)
Lengtl\loItd.(ft)
MinchEl(ft)
Alpha
FrctnLoss(ft)
C&ELoss(ft)

I

I

warning:
warning:
loIarning:
warning:

The ener9Y equation could not be balanced within the specified numbe rofiterations. The
program used critical depth for the water surface and continued on with the calculations.
The velocity head has changed by more than 0.5 ft (0.15m). This may indicate the need for
additional cross sections.
The ener9:(10u was greater than 1.0 ft (0.3 m). between the current and previous cross section.
ThismaYlndicatetheneedforadditionalcrosssections.
During the standard step iterations. when the assumed water surface was set e<jual 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.

I

CROSS SECTION

RIVER: Crystal
REACH: Marble

RS: 23576

INPUT
Description;
StationElevationoata num_
Sta Ell''' St... Ele"
07970.49 L047969.54
15.447963.35 25.077959.07
45.97949.88 46.497949.58
67.897949.45 71.527949.45
96.87949.58 98.457949.65
114.747947.71 115.787947.37
140.167949.23142.197949.07
158.497947.73 185.637947.31
209.697944.68211.487944.39
241.847944.83250.367946.41
267.87947.32271.267947.39
284.397945.42312.757945.38
328.147949.87335.487955.21

I

I

I

Mannin9'snvalues
Sta n val Sta
o .06211.48

..
Sta E.1ev
3.667968.86
31.027956.52
49.277949.56
78.597949.36
103.887949.69
118.617947.98
150.847948.22
198.227947.09
211.97944.B
251.H 7946.61
278.217947.92
313,69 7945.6
340.027959.11

Sta Ele"
13.717964.12
35.787954.43
57.187949.48
82.967949.4
106.477949.68
122.577949.14
153.747947.9
200.147946.65
237.657944.53
254.057947.13
279.177947.58
323.887947.88
345.17963.7

num_ 4
nVal Sta
.035237.65

nval Sta
.05 ]12.75

coeft Contr. Expan.
.1 .3

I

BankSta: leftRlght Lengths: Lettchannel Rlght
211.48237.65 321.73345.98365.58
Ineffective Flow nUm_ 1
Stal StaR Elev Permanent
0125.027949.82 T
CROSS SECTION OUTPUT profile*100-year

I

~e~' H~~~v (m)
~;'~t ~~~~ ~m
E.G. slope (ft/ft)
QTotal (cfs)
~~~ ~~~~~ m~s)
MaxchlDpth(ft)
conv.Total (ds)
Lengthloltd. (ft)
MinchEl(ft)
Alpha
FrctnLoss(ft)
C &. E LOSS (ft)

I

7'il48.'il3
0.83
7948.09
7948.09
0.008648
1691.00
178.73
5.H
3.76
18183.9
148.36
7944.33
1.88
1.33
0.05

element
\fit. n-val.
ReacnLen. (ft)
Flow Area (sq ft)
~~~: ~~~srt)
TOP Width (ft)
~~9;.. Vg2jlt~f~m
cony. (cfs)
Wetted Per. (ftl
shear (lbjsq ft
Stream power (1/fts)
Cum volume (acre-ft)
cUm SA (acres)

LeftOB
0.060
773.34
41.>3
41.>3
1117.74
14.69
4.52
2.83
1964.3
15.73
1.51
6.80
120.31
53.47

nval
,06

Channel
0.035
831.57
109.55
109.55
1410.62
19.38
12.88
5.65
14759.2
19.38
3.22
41.51
111.15
26.60

sta Elev
14.377963.83
43.487950.92
65.657949.46
89.37949.42
109.777948.91
125.027949.82
154.867947.77
207.047945.09
240.317944.54
260.187947.25
284.097945.54
326.297948.4

Rig~~6gB
855.60
82.73
82.73
351.64
33.87
4.25
2.44
3679.2
34.3S
1.37
5.83
204.42
72.34

Left 08
0.060
321.73
61.10
63.19
142.75
65.34
2.34
1.03
li35.0
59.80
0.55
1.29
104.19
49.14

Channel
0.035
345.98
95.91
95.91
900.00
26.17
9.38
3.66
9678.0
26.18
1.98
18.56
100.74
26.16

Rig~~5~8
365.58
159.34
li9.34
648.25
87.22
4.07
1.83
6970.8
88.27
0.97
3.96
183.47
66.77

warning:
warning:
warning:
Warning:
warning:

Tne energy equation could not be balanced within the specified numb erofiteratians. The
program used critical depth for the water surface and continued on wlth the calculations.
oivldedflow computed for this cross-section.
Th~ conveyance ratio (upstream conveyance divided by downstream conveyance) is less than
0.7 or greater than 1.4. This may indicate the need for additional cross sections.
The ener!l:(loss was greater than LOft (0.3m). between the current and previous cross section.
This mayllldicne the need for additional cross sections.
During the standard step iterations, when the assumed water surface was set e<jual to critical
depth, the clllculatedwater surface carne back below critical depth. ThisindlCatesthatthereis
not Ilva1id SubCritlc:lll answeL Tne prororamdefaulted tCl critical dept!\.

I

I

CROSS SECTION OUTPUT
ee~' H~~~v (m)
W.S. El~v eft) .
crit W.S. eft)
E.G. slope (ft/f't)
QTotal (cfs)

I

I

profilelFloodway

7949.28
1.06
7948.22
7948.22
0.011236
1691.00

Element
wt.n-val.
Reach Len. (ft)
Flow Area (sq ft)
Area (Sj'"
Flow (c s)

Left OR

321.73

Channel
0.035
345.98
99.21
99.21
990.86

Rig~~5gR
365.58
144.65
144.65
700.14

Page 3