WSP06127

• File Number: 8276.350
• Description: Lower Gunnison Basin Unit - Colorado River Basin Salinity Control Project
• State: CO
• Basin: Colorado Mainstem
• Water Division: 4
• Date: 9/1/1979
• Title: Draft Report of the Lower Gunnison Salinity Study
• Water Supply Pro - Doc Type: Report/Study

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
i23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
1 39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54

3. What will be the effect on salinity contributions to the Colorado

River? Salt loading will be reduced through reducing deep percolation-

and ditch seepage from irrigation with an increase in irrigation effi-

ciency, and from reducing runoff and erosion from the

shed.

SCOPE OF STUDY

The scope of the study was limited

on-farm irrigation

systems and practices on about
.

. land and manage-

ment practices on

acres of privately

Results of these

analyses were extrapolated over

'of irrigated land

and

acres of privately owne

reaches of the

Gunnison and Uncompahgre Rivers.

not include analysis of

seepage from

the distribution systems

throughout the

is the respon-

sibility of tn

U. S. Department of the Interior.

igation stream and the duration of each

variables affecting results of irrigation.

prinkler methods of irrigation also was considered as

. y.s.isof-,i~Hgat.Wn--W:lter man3~~ ,- ---

Physical improvements in existing irrigation systems were analyzed to

determine their affect on water use and the return flows that deliver salt

to the Colorado River system. Options for physical improvements consist

II-4

D01115