WSP01274

• File Number: 8135.300
• Description: Ditch Companies - Catlin
• State: CO
• Basin: Arkansas
• Water Division: 2
• Date: 1/1/1973
• Author: USGS
• Title: Colorado Water Resources-circular Number 20 - Transit Losses and Travel Times for Reservoir Releases - Upper Arkansas River Basin - Colorado
• Water Supply Pro - Doc Type: Report/Study

076~

EXAMPLE 2

RELEASE FROM

Twin Lakes

RESERVOIR TO

Colorado Canal

.He of release: 6-5-71 Amount of release: _~.2..Q_JtJ/s

Flow at ~el1sville gaging station prior to release: ~ftJ/s
(Call 539-6487 for stage, obtain discharge from table 2)

Duration of release: ~dav8 (240 hours)

Time of travel (fig. 3): ~hours

2

TRANSPORTATION LOSSES
Bank storage (fig. 6)
3

0-1
1-)
)-11
11-21
21-72
72-312
312+

1
2
6
10
51
240

Actual time
in interval
(hours)

I
2
8
10
51
168

4
Average
bank storage
in interval
(ft'/s)

520
260
140
90
55
30

5
Bank storage
In time interval
(col. 3 x co1. 4.
hours x ftJ/8)
520
520
1,120
900
2,805
5,040

Time interval
(hours)

Maximum t1llle
in hours

Totals

240

10,905

Charge for bank storage lOBS is 70 percent of column 5 divided by duration of release:
Inadvertent diversions
Charge for inadvertent diversion losses (fig. 7):
Evaporation
Surface area increase (fig. 8): 215 acres
Charge for change in surface area (fig. 9):
Charge for change in river temperature (fig. 10):

2,!..:..~_Jt J I s
~ftJ/s

TOTAL TRANSPORTATION LOSS---------------------------------------------------------------------
TOTAL TRANSPORT^TION LOSS (percent of rele88e)------------------------------------------------

3.1 ft J/s
0.7 ft3fa

13.1 ft3/s
18.3 %

. DIVERSION SCHEDULES
Prior to re.cession st Colorado Canal
2 3 4 5 6 7 8
Average Channel
Time Maximum. time Release bank storage Inadvertent Evaporation storage Total
interval in hours discharge (col. 4 above. diversion (ft'/s) (fi~. 4, (cols. 4-7.
(hours) (ft3fs) ft3/s) (ft'/s) ft Is) Et3/s)
0-1 1 400 520 37.5 3,9 315 876
1-3 2 400 260 37.5 3,9 215 516
3-11 8 400 140 37.5 3,9 100 281
11-21 10 400 90 37.5 3.9 30 161
21-72 51 400 55 37.5 3,9 0 96
72-312 24Q 4~Q 30 37.5 3.9 71
312+

9
Average
divenible
discharge
(ft3/s)

119
239
304
329

Release Jrrived at ~hours

During receaaion at Colorado Canal

Final divertible discharge from column 9 above---------------------------------------------------
Release recession began at 0730 hours

~ft3/s

Time interval from beginning
of recession (hours)

0-4
4-8
8-12
12-16
16-22
22-32

Average divertible discharge
(fh:. 11. ft3/s)

281
192
116
57
14
o

.

33