WSP07972

• File Number: 8272.100.60
• Description: Colorado River Basin Salinity Control Forum
• Basin: Colorado Mainstem
• Water Division: 5
• Date: 10/1/1993
• Author: CRBSCF
• Title: 1993 Review - Water Quality Standards for Salinity - Colorado River System
• Water Supply Pro - Doc Type: Report/Study

Table 2.2-Comparison of Salinity Levels to the Numeric Criteria for the Existing (1991) Level
of Development and Salinity Control

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Station

Nu mericCriteria Adjusted Observed Salinity
(mglL) Salinity (mglL)
(mglL)
723 no 634
747 747 635
819 864 753

Colondo River below Hoover Dam

Colorado River below Parter Pam

Colorado Ri\'er at Imperial Dam

. Reflects salinity dial would occur from long~tenn mean water supplY'8 computed by CRSS. Observed
1991 aalinity levels were lower due to unuBUAlly high runoff in earlier years and storage ufibel water in
the reservoir .ystem.

PRO.IECTlONS

Future Water Depletions

One of the significant factors affecting salinity concentrations is water use. Estimates of
projected water use through the year 2015 for each of the seven states were developed jointly
by the states and Reclamation.

Table 2.3 presents a summary of estimated water depletions in the Upper Colorado River
Basin, and from the main stem of the Lower Colorado River.

Table 2.3
SlImmary of Projected Water Deoletions in the
Colorado River Basinli. ~I

(1,000 acre-feet)

1995 2 000 2005 2010 2015
Upper Basin:!! 3,776 3,945 4,094 4,280 4,390
Lower Basin~1 7,500 7,500 7,500 7,500 7,500
Total 11,276 1 1,445 11 ,594 11,780 11 ,890

I/Source: Table prepared from primary depletion projections utilized by Reclamation for CRSS salinity runs.

lIDoes not include deliveries to Mexico.

liDepletions at point of use. Does not include Colorado River Storage Project reservoir evaporations estimated by
Reclamation to average 520,000 acre-feet per year under full development.

~/Lower main stem only. Diversions from the main stem less returns. Does not include main stem reservoir evaporation
and stream losses.

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