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Terms and Conversions

 

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A

Acre-foot

The volume of water required to cover one (1) acre of land to a depth of one (1) foot.

 

adjudication

The legal process of determining the relative right to claim use of an amount of water in a drainage basin by the issuance of a judicial decree establishing priority.

alluvium   

a deposit of sand, mud, etc. formed by the erosional and depositional processes of lowing water.

appropriation   

the establishment of a water right by the diversion and application of water to a beneficial use.

aquifer   

a geologic formation capable of yielding a significant amount of ground water to wells or springs.

augmentation plan

a detailed program to increase the supply of water available for diversion; required under Colorado water regulations as a means of requiring the release of water to prevent injury of water rights by out-of-priority diversions

 

B

beneficial use the use of water that is appropriate under reasonably efficient practice to accomplish, without waste, the purpose for which the diversion was made.
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C

compact a contract between two or  more states, defining the water use rights of each state on an interstate stream
conjunctive use the integration of ground water and surface water supplies to increase the total effective water supply
consumptive use the amount of water consumed during use of the water and no longer available to the stream system.
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D

decree a judicial order substantiating a water right; its priority, amount, use and location
diversion the removal of water from its natural course or location.
drainage basin an area of land which drains to a common point along a stream channel
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E

EA/EIS Environmental Analysis/Environmental Impact Statement - the projected effect on the social, economic and natural environment from a proposed project.
effluent wastewater or other liquid flowing out of a reservoir, settling basin or treatment plant.
enlargement a subsequent right awarded to a ditch or structure enlarging the amount granted originally
environmental liability the legal obligation to clean up original environmentally damaged or polluted surroundings
ET Evapotranspiration - the combined process by which water is transferred from the earth's surface to the atmosphere, by evaporation and plant transpiration.
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F

flume an artificial channel or trough for conducting water
404 Permit a permit issued by the Army Corps of Engineers based on guidelines for water discharge set out by t he Environmental Protection Agency; includes storm water runoff, process wastewater, municipal wastewater, and also applies to the replacement of fill materials in a stream as in dam construction.
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G  

ground water water below ground surface filling openings in soils and geologic formations
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H

hydrology the science of the properties, distribution and movement of water
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I

inclusion agreement an agreement establishing the terms under which an entity is included into a municipality or special district.
intrastate existing or occurring within a state.
interstate connecting or jointly involving two or more states
intervener any group or person actively interfering in the progress of a project for emotional, environmental or other reasons and a key member in negotiating a timely settlement to allow project completion.
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J 

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K

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L

land application disposal of wastewater and waste solids onto land
lysimeter an instrument used for determining the amount of water consumed by natural vegetation or agricultural crops.
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M

mitigation to make less severe; in environmental work, the rehabilitation or replacement of areas to lessen the impact of development projects
modeling refers to the computer simulation of a physical situation to determine the response to certain stresses (e.g. diversions, recharge).
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N

NPDES National Pollution Discharge Elimination System - taken from a section of the Federal Clean Water Act; NPDES is the mechanism for applying effluent standards, water quality standards, and monitoring requirements.  EPA is authorized to issue a permit to any applicant whose discharge meets federal requirements.
nontributary ground water ground water not hydrologically connected to a surface stream; withdrawal of which will not deplete the flow of a natural stream at an annual rate of greater than one-tenth of one percent of the annual rate of withdrawal over a one hundred year period (Colorado).
not nontributary ground water  
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O

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P

perfection of a water right the process of meeting all of the legal requirements for establishing a legal right to the use of water, once perfected, a conditional water right becomes absolute.
pre-213 right a right to use ground water initiated prior to July 6, 1973, which is subject to the appropriation system, rather than landownership (Colorado), from Senate Bill 213.
phreatophytes water tolerant plants frequently associated with wetlands, i.e. cottonwood trees, willows and cattails.
priority the relative seniority by date that the water right is entitled to divert in relation to other water rights deriving their supply from a common source.
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Q

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R

recharge the process, natural or artificial, of adding water to underground storage.
rapid infiltration the process of disposing of treated wastewater through controlled structures into the ground.
return flow that portion of diverted water which is not consumed but returns to the stream system.
reuse subsequent use of reclaimed (treated) wastewater for potable or non-potable use.
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S

Senate Bill 5 A 1985 Colorado legislative enactment providing for allocation of nontributary ground water on the basis of ownership of the overlying land
special district quasi-municipal corporation of the State of Colorado empowered to perform and deliver services to the owners of property located within a legally described boundary.
specific yield the ratio of the volume of water draining out of a volume of material to the total volume of material drained; used to calculate the quantity of water recoverable from underground storage.
surface water water in or from a natural stream
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T

tap the physical connection for water or sewer service
transpiration to emit a watery vapor through the leaves of a plant
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U

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V

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W

water right a right to use a certain portion of waters
absolute a water right that has been perfected and placed to beneficial use
conditional a right to perfect a water right, upon diligent completion of the appropriation
weir  
wetland  
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X

Xeriscape  
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Y

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Z

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