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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warning;
'fjarning:

CrystalRiver.rep
program used critical depth for the water surface and contin~ed on with the calculations.
i~1 s e~:?r na~~:t:a~h~r~:~~r f~~a~d~i ~i~~a fO(~o~~' s~~ii~~~. the current and previous enss sect; on.
Ourin\l the standard step iterations, when the ,,"ssumed water sllrface was sst egual to critical
depth, the calculated water surface callle back below critical depth. This indlcates that there is
~~f t~p r:1 ~~i ~~~~fi ~~~~~s a~~:r fou~~e a~r~~~:ml~~:~~~~~d ~~e c~~~~~~~ 1 d~~~~h wi eh the lowest, val i d, water
surface was used.

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Note:

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CROSS SECTION OUTPUT
~~f'H:~~V(HF
w.~. Elev eft)
er1t W.S. eft)
E.G. slope (ft/ft)
QTotal Cds)
~~~ ~~~~~ ~~~~s)
MaxChl0pth(ft)
(onv,Totalecfs)
Length Wcd. (ft)
"';nchEl (ft)
Alph~
FrctnLoss(ft)
C & E loss (ft)

profile ;fFloodw~y
7811.32 Element
1.20 Wt. n-V~l.
7&10.12 Reach Len. eft)
7&10.12 Flow Area (sq ft)
0.008687 Area (sq ft)
2.1&1.00 Flow ~cfs)
110.31 Toplo'ldth(ft)
6.73 Avg. vel. (ft/s)
5.18 Hydr. Depth (ft)
23400.4 CorlV. (cfs)
664.39 wetted per. (ftl
7804.94 Shear (lb/sqft
1.70 StreamPower(l/fts)
3.65 Cum vollmle (acre-ft)
0.26 cum SA (acres)

LeftOB
0.050
655.25
228.62
230.29
1l~0.4.1
91.65
4.99
2. ~9
12235.6
94.60
1.31
6.54
11.86
4.62

Channel
0.035
667.30
85.14.
85.14
la01.14
16.57
11.78
5.14
10762.9
16.57
2.79
32.83
57.91
13.80

Ri8~~5gB
694.85
10.34.
10.34.
37.46
2.09
3.62
4.95
401.9
6.91
0.&1
2.94
9.73
3.69

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I

Warning:
warning:
Warning:
warning:
warning:
Warning:

The energyequatilln could not be balanced within the specified nUm berofiterations. The
program used critical depth fllr the water surface and cllntinued 0 nwith the calculatillns.
The velllcity head has changed by nKIrethanO.S ft (0.15m). This may indicate the need fllr
additionalcrllsssections.
Thecllnveyance ratill (upstre~conveyancedividedbydownstreamconveyance) is less than
0.7 or greater than 1.4. ThlsmayindicatetheneedforadditionalcrosssectillnS.
The cross section had tll "e e~tended vertical1~ during the critical depth calculatillns.
~~~/~;~9~n~\~it~a~h~r~:~~r f~~a~d~; ~i:~a~OC~ll~S' s~~~~~~~. the current and previous cross section.
During the standard step heratillns, when the assUllled water surface waS set equal to critical
depth, the calculated water surface came back below critical depth. This indlcates that there is
~~f tf Pl:l~~i ~~~~~i ~~~~~s a;~~:r fllU~~e ~~r~~i:'" l~~:~~~~~d ~~e c~m~~~ 1 dd~~~h wi th the lowest, val i d, water
surfac;ewasused.

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NllU:

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CROSS SECTION llUTPUT profilellO-year
~e~'H;~dv(tW 7809.50 Element Left OS Channel Rig~65~B
0.57 ". n-val. 0.050 0.035
~;~t ~:~~ ~m 7808.93 Reach Len. (ft) 655.25 667.30 694.85
7808.93 FlllW Area (sq ft) 215.65 65.28 115.44
E.G.slllpe(ft/ft) 0.007229 ~l~: ?~1St) 386.50 65.28 115.44
Q Total (cfs) 1657.00 574.38 587.85 494.77
~~~ *~~~~ HUs) 267.50 TOp width ~ft) 199.20 16.57 51.74
4.18 AV~. vel. ft/S~ 2.66 9.00 4.29
~~~v ~hio~~ih (~~~~ 5.13 Hyr.Depth(ft 1.08 3.94 2.23
19488.9 ellnv. (cfs) 6755.6 6914.0 5819.3
Ler1qthWtd. (ftl 669.33 Wetted Per. (ftl 200.86 16.57 52.26
MinehEl (ft) 7804.94 shear (lb/sq ft 0.48 1.78 1.00
Alpha 2.10 Stream Power (1 /ft s) 1.29 16.01 4.27
FrctnLoss(ft) 4.67 eum volume (acre-ft) 20.28 45.31 22.46
ell. E LOSS (ft) 0.05 eUmSA(acres) 14.00 13.80 15.51

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I

Warning:
warning;

The energy equatilln could not be balanced within the specified number of iterations. The
programusedcriticaldepthforthewatersurfaceandCllntinuedonwith the calculations.
~~~s e.:?t n1i~it:a~h~r~~~:r f~~a~dai~i:~atO c~o~~' s~~~~~~~. the current and previllus cross secti on.
During the standard step iterations. when the assumf!d water surfaCf! was set equal to critic;>.l
depth, the calculated water surface came back below critical depth. This indicates that there is
~~ftf p1: 1 ~~i ~~~~~i ~~~~~s a~~;:r fou~~e a~r~~i:m l~~:~~~~~d ~~e c~m~~~l dd~~~h wi th the lowest, v~ 1 i d. Water
surface waS used.

warning:

Note:

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CROSS SECTION OUTPUT Prllfile #50_year
~~~'k~~~v(~W 7809.75 Element LeftaB Channel Ri&~~5gB
(1.<;5 ". n-va1. 1).050 O.tH,
~~~T ~:~~ ~m 7809.10 Reach Len. (ft) 6\5.25 667.30 694.8.\
7809.10 Flow Area (sq ft) 250.29 68.16 124,47
E.G. slope (ft/h) 0.008079 ~l~: ~~1srt) 421.14 68.16 124.47
o Tllnl (cfs) ;>031.00 775.18 667.70 588.12
~~~ ~~~~~ m~sJ 269.44 Top Wldth ~ft) 200.52 16..\7 S2.36
4.59 AV~. vel. ft/s~ 3.10 9.80 4.73
"'a~ ehl Dpth (ft) 5.30 Hyr.Depth(ft 1.25 4.11 2.)8
Cllnv.Total (cf5) 22595.6 (llnv. (ds) 8624.1 7428.4 6\43.1
Lengthwtd. (ft) 669.00 Wetted per. (ft) 202.19 16.57 52.90
",il\<:IIE1(ft) 7004.94 ~~~:~m (~~,~, H&/ft s) 0.62 2.07 1.19
Alpha 1.98 1.93 20.32 5.61
~T~ t~~~ ~m 4.88 CUm Volume (acre-ft) 25.50 50.88 29.38
0.06 CUrnSA (acres) 15.80 13.80 17.96

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1

warmng:

The energy equatilln could not be balanc;ed within the specified number at iteratillns. The
programusedcr1ticaldepthforthewatersurfaceandcontinuedonw1th the calculatillnS.
The energy loss was greater than 1,0 ft (0.3 m). between the current and previllus cross section.
This m~y 1 ndicate the need for addltional cross Sectillns.
During the standard step it"rations, when th" assumed water surface was set equal to critical
depth,thec;alculatedwatersurfacecamebackbelllwcriticaldeptho This indicates that there is
~~f tf pl: l~~i~~~~~i ~~~~~s a~~~:r fllU~~e a~r~~i:m l~~!~~~~~d ~~e c~~~~~~~l dd~~~h wi th the lllWeS t, val i d,
surface waS used.

water

warning:
warn'ing;

1

Note:

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CROSS SECTION OUTPUT profile#500-year
E.G. El~v (ft) 7810.04 Element Leh 08 Channel Rig~~5gB
,,' Head Cft) 0.73 ". n-val. 0.050 0.035
~r~t ~~~~ ~m 7809.31 ReactlLen. (ft) 65,,2; 667.30 694.8,
7809.31 Flow Area (sq ft) 292.26 71.61 135.46
E.G. slope Cft/ft) 0.008911 ~~~: ~~fsrt) 463.11 71.61 B5.46
o Totel (cfs) 2S15.00 1049.13 761.48 704.39
~~~ ~~~~~ ~:~jS) 271.69 lap width Pt) 202.02 16.57 B.I0
.\.04 Avg.vel. ft/sS 3.59 10.63 5.20
~a~ ehl opth eft) S.51 Hydr.oepth(ft 1.45 4.32 2.55
conv.Tlltal (cfs) 26641.8 CllnV. (ds) 11113.6 8066.5 7461.7
Lengthwt:d. (ft) 668.66 ~~;~~d e~~/sq (m 203.71 16.57 53.68
MinChEl eft) 7804.94 0.80 2.40 1.40
Alpha 1.86 Stream power (lb/ft s) 2.87 25.57 7.30
FfctnLoss(ft) 5.06 Cum velume (acre-ft) 3],1l 57.57 38.64
c&ELoss(ft) 0.06 eum SA (acres) 19.93 13.80 2O.39

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I

Warning:
warning:
w<trninQ;

The energy equation clluld not be balanced within the specified numb erllfiteratillns. The
program u,ed crnical depth for the water surface and continued on with the calcuhtjllns.
The energ~ 1055 was greater than 1,0 ft (0.3 rn). between the current and previous crllSS sec;tilln.
This may lndicate the need foraddltional cross sections.
tluring tf.,I> staMud step itera.ti'3I\S, whel\ tlle a.ssUIII<!d "'''tl>r surface. ....s set e~\I<.l to critical
depth, the calculated water surface c;:ame back be.low critic;al depth. This indlcates that there is
~~ftipl:1~~i~~~~~i~~~~~sa~~~:rfou~~ea~r~~i:ml~~!~~~~~d i~ec~~~~~~~ld~~~~h with the lowest, valid, water
surface was used.

Note:

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