Parameter: A variable, measurable property whose value is a determinant of the characteristics of a system such as water. Temperature, pressure, and density are examples of parameters.
parameter A definable characteristic of an item, device, or system in mathematics which remains constant during calculation.
paraquat A standard herbicide used to kill various types of crops.
parameter
Information used as input to a water quality model or estimated by a water quality model. Examples of parameters include
particulate matter ...
Parameter: A variable quantity - such as temperature, dissolved oxygen, or fish population Ñ that is the subject of a survey of sampling routine.
Periphyton: Plants, usually algae, attached to rocks or other instream objects.
A parameter or a value derived from parameters that describe the state of the environment and its impact on human beings, ecosystems and materials, the pressures on the environment, the driving forces and the responses steering that system.
Roughness: A parameter describing a surface characteristic of a fracture plane. Roughness is important in determining resistance to flow.
seasonal variation The change in a set of meteorological parameters averaged over three months. Seasonal variation is the largest climatic variation, and temperature is the most fre- quently observed meteorological parameter.
Environmental Performance Index A parameter describing environmental impact with a single figure. An index is usually calculated by weighting the actual impact level against a target level. Also see valuation. ...
Interest by individuals and volunteer groups in making local water quality observations is high, and an understanding of the basic chemistry of many water quality parameters is an essential first step to making good measurements.
Parameter characterizing the dispersion of the quantity values being attributed to a measurand, based on the information used.
One Dimensional Model - An atmospheric modeling technique in which a concentration or another unknown can be calculated relative to certain parameters, such as altitude or temperature. [Nature; v332; 667;1988.
Equipment used to sample and condition, analyze and provide permanent record of emissions or process parameters that reduce the transmission of light and obscure the view of a background object.
Continuous Sample ...
confounding factors. Variables other than chemical exposure level which can affect the incidence or degree of a parameter being measured.
time-weighted average. The average value of a parameter
(e.g., concentration of a chemical in air) that varies over
time.
The composition of the gas can be modified by choice of gasification parameters to be optimized as a fuel gas (producer gas) or synthesis gas which contains almost exclusively CO and H2 and is suitable for synthesis of liquid biofuels.
such as the Appalachian Mountains or a smaller area such as a stream bottom. Instead of the term landscape, land managers often use terms such as landforms, slope position, or micro-topography to describe the appearance and ecological parameters of ...
A 95 percent confidence interval means that in repeated samples from the same population, 95 percent of the time the true underlying population parameter will be contained within the lower and upper bounds of the interval.
Pollution occurs when one of these three parameters stresses the organisms in an ecosystem and requires responses beyond their normal range of resiliency, causing sickness or death.
pollution, organic.
 See also: Water, Air, Environment, Site, Table
  
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