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WSP11033
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Last modified
1/26/2010 3:15:46 PM
Creation date
10/12/2006 4:40:41 AM
Metadata
Fields
Template:
Water Supply Protection
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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<br />. <br /> <br />l\) <br />en man's activities. Salt concentrating results when water is lost through <br />W <br />. ~ evaporation or transpiration within the Basin or when water of lower <br /> <br />salinity than that of downstream points is diverted from the Basin. <br /> <br />The result is an increase in downstream salinity due to the remaining <br /> <br />. <br /> <br />amount of salt being carried in less water. <br /> <br />Studies of the effects of salt loading and salt concentrating <br />within the Colorado River Basin have been conducted for about 20 <br /> <br />. <br /> <br />years. Although adequate information is lacking to accurately identify <br />all contributing sources of salinity, the studies have identified the <br /> <br />major sources of increasing salinity in the river as it flows from <br />the headwaters to the Gulf of California. However, present under- <br /> <br />. <br /> <br />standing of the cause and effect relationships is limited with <br />respect to natural and man-caused salinity in irrigated areas. <br /> <br />. <br /> <br />The relative effects of salt loading and salt concentrating <br />factors on salinity in the river at Hoover Dam for the period 1942-61, <br />as estimated by the Environmental Protection Agency in its 1971 report, <br />"The Mineral Quality Problem in the Colorado River Basin", are shown <br /> <br />. <br /> <br />in Table 1. Some of the estimates in EPA's report are being <br /> <br />investigated and brought up to date by USBR studies currently <br /> <br />underway. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />-12- <br /> <br />. <br /> <br />~,~<jj; <br />
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