WSP11033

• File Number: 8272.100.70
• Description: Colorado River Basin Salinity Control Forum
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 6/1/1975
• Author: CRBSCF
• Title: Water Quality Standards for Salinity Including Numeric Criteria and Plan of Implementation for Salinity Control
• Water Supply Pro - Doc Type: Report/Study

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TABLE 1

EFFECTS OF V~RIOUS FACTORS OF SALT LOADING
A T HOOVER DAM

(1942-61 Period of Record Adjusted to 1960 Conditions)

Source: "The Mineral Quality Problem
in the Colorado River Basin,
Summary Report", EPA, 1971

2S9c;

Factor

. Portlon of'
.
Salinity Concentration . Salinity Concentration
.
. at Hoover Dam . at Hoover Dam
. .
Percent . Ascribable to Ascribable to
.
of Each Source 11 . Each Source 11
.
Salt Load myl : Percent
5).4 275 39
11.9 59 8
33.0 253 37
03.0) (178) (26)
(0) (75) (n)
1.4 10 1
-J.4 20 3
J.O 80 12
..l.:.1 ,0 0
10J.0 697 100

Natural Diffuse Sources

Natural Point Sources

Irrigated Agriculture

Salt Loading

I
f--'
vo
I

Salt Concentrating

Municipal and Industrial

Exports Out of the Basin

Evaporation and
Phreatophytes

Storage Release From
Hoover y

TOTAL

>-'I
Pl
0'
I-'
CD
f--'

11 In addition to increases in salinity from salt loading, some factors also cause salinity
increases by removal of dilution water. The changes shown mRV res1l1t from either or both.
y Computed annual values for balancing based upon the net drawndown over the 1942-61 period.

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