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WSP09197
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Last modified
1/26/2010 2:51:53 PM
Creation date
10/12/2006 3:30:53 AM
Metadata
Fields
Template:
Water Supply Protection
File Number
8270.100
Description
Colorado River Basin Water Quality/Salinity -- Misc Water Quality
Basin
Colorado Mainstem
Water Division
5
Date
1/1/1981
Author
USDOI
Title
Quality of Water - Colorado River Basin - Progress Report No. 10 - January 1981 -- Part 2 of 2 -- Part X - page 99 through end
Water Supply Pro - Doc Type
Report/Study
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<br />. <br /> <br />. <br /> <br />. <br /> <br />~" <br />..... <br />0;) <br />(,..) <br /> <br />Natural Flow - See definition of virgin flow. <br /> <br />additional salts introduced into the <br />The terms pickup rate is usually meas- <br />varies from zero tons to two tons per <br /> <br />Pickup of salts is the amount of <br />system when irrigating new lands. <br />ured in tons/acre and generally <br />acre. <br /> <br />Present modified flow is the historic flow adjusted to reflect the present <br />level of depletions with corrections to remove the effects of major reser- <br />voirs, computed with an average present level of evaporation. <br /> <br />Recorded Flow is the flow passing a specific point on a stream which is <br />measured and a record kept for a period of time. <br /> <br />Return Flow is the amount of water returned to the river system after being <br />diverted for a use. <br /> <br />Salt is a compound derived from an acid by replacing hydrogen with a metal <br />or-8n electropositive radical. <br /> <br />Sediment is a solid material that orlglnates mostly from disintegrated <br />rocks and is transported hy, suspended in, or deposited from water; it <br />includes chemical and biochemical precipitates and decomposed organic <br />material, such 8S humus. The quantity, characteristics, Bnd cause of the <br />occurrence of sediment in streams are influenced by environmental factors. <br />Some major factors are degree of slope, length of slope, soil character- <br />istics, land usage, and quantity and intensity of precipitation. <br /> <br />Specific conductance is a measure of the ability of a water to conduct an <br />electrical current. It is expressed in micromho8 per centimeter at 250 C. <br />Specific conductance is related to the type and copcentration of ions in <br />water and can be used for approximating the dissolved-solids content of the <br />water. Commonly, the concentration of dissolved solids (in milligrams per <br />liter) is about 65 percent of the specific conductance (in micromhos). <br />This relation is not constant from stream to stream, and it may vary in the <br />same source with changes in the composition of the water. <br /> <br />Stream Flow is the discharge that occurs in a natural channel. Although <br />the term "discharge" can be applied to the flow of a csnal, the word <br />"stream flowl1 uniquely describes the discharge in a surface stream source. <br />The term "stream flow" is more general than "runoff" as stream flow may <br />be applied to discharge whether or not it is affected by diversion or <br />regulation. <br /> <br />Suspended sediment is the sediment that at any given time is maintained in <br />suspension by the upward components of turbulent currents or that exists <br />in suspension 88 a colloid. <br /> <br />Tons per acre-foot indicates the dry mass of total dissolved solids in 1 <br />acre-foot of water. It is computed by multiplying the concentration in <br />milligrams per liter by 0.00136. <br /> <br />126 <br />
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