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<br />N
<br />t.I.)
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<br />Q)
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<br />Eutrophication results from the enrichment of
<br />a body of water with nutrients which stimulate
<br />the growth of algae, Eutrophic lakes and
<br />reservoirs overproduce algae causing loss of
<br />dissolved oxygen and taste, odor, and esthetic
<br />problems, (See trophic state,)
<br />
<br />
<br />Definitions of Terms
<br />
<br />Acre.foot is the quantity of water required to
<br />cover 1 acre to a depth of 1 foot and is equivalent
<br />to 43,560 cubic feet or about 326,000 gallons or
<br />1,233 cubic meters,
<br />
<br />Anoxic refers to the lack of oxygen,
<br />
<br />Cablegation is irrigation from a piped ditch
<br />were the rate of discharge to the furrow is
<br />controlled by a cable attached to a plug in the
<br />pipe,
<br />
<br />Chemocline is a level in a lake or reservoir
<br />where water quality shifts rapidly with elevation
<br />from one zone of water quality to another,
<br />
<br />Concentration is the flow-weighted average
<br />concentration oftotal dissolved solids (salt)
<br />measured in mglL or tons/acre-foot,
<br />
<br />Conductivity, See specific conductance,
<br />
<br />Consumptive use is the total amount of water
<br />taken up by vegetation for transpiration and
<br />evaporation,
<br />
<br />Cubic feet per second (fia/s or cfs) is the rate
<br />of discharge representing a volume of 1 cubic
<br />foot passing a given point during 1 second and is
<br />equivalent to approximately 7.48 gallons per
<br />second or 448,8 gallons per minute,
<br />
<br />Depletion in the context of this report is the
<br />total man-caused loss of water from the river
<br />system due to consumptive uses, evaporation,
<br />evapotranspiration, and transmountain
<br />diversion.
<br />
<br />Discharge is the volume of water plus
<br />suspended sediment that passes a given point
<br />within a given period oftime,
<br />
<br />Dissolution is the process of dissolving,
<br />
<br />Dissolved solids - see total dissolved solids,
<br />
<br />Diversion is the total amount of water diverted,
<br />Diverted water mayor may not return to the
<br />river.
<br />
<br />Gauging station is a particular site on a
<br />stream, canal, lake, or reservoir where
<br />systematic observations of hydrologic data are
<br />obtained,
<br />
<br />Historical flow is the flow actually experienced
<br />at the gauging station or point of measurement,
<br />It is the total runoff of a drainage area above the
<br />point of measurement as influenced by nature
<br />and the activities of man, It may be recorded or
<br />estimated,
<br />
<br />Natural flow, See definition of virgin flow,
<br />
<br />Oxic refers to the presence of oxygen,
<br />
<br />Return flow is the amount of water returned to
<br />the river system after being diverted for use,
<br />
<br />Salinity control unit, One specific unit or
<br />project of the overall Colorado River Basin
<br />Salinity Control Program,
<br />
<br />Salts are inorganic compounds of metals such as
<br />sodium, calcium, magnesium, or potassium and
<br />bases such as carbonates, sulfate, or chloride,
<br />Soluble salts will dissolve into metallic and basic
<br />ions when exposed to water,
<br />
<br />Salt pickup is salts added to the system usually
<br />by dissolution,
<br />
<br />Sediment is a solid material that originates
<br />mostly from disintegrated rocks and is
<br />transported by, suspended in, or deposited from
<br />water; it includes chemical and biochemical
<br />precipitates and decomposed organic material
<br />such as humus,
<br />
<br />Specific conductance is a measure of the
<br />ability of a water to conduct an electrical
<br />current, It is expressed in micro mhos per
<br />
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