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Variables Details
: (EM-63)
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EM Identity and Description
| EM-63 | |
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Document Author
variable.detail.emDocumentAuthorHelp
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US EPA Office of Research and Development - National Exposure Research Laboratory |
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Document Year
variable.detail.emDocumentYearHelp
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2013 |
Variable General Info
Land cover parameter ?Comment:Fixed parameter values for the regression equation (Sanford and Selnick 2013): AET = PΛ(τΔ/(τΔ+Π)) (2) Λ=1+cLd+eLf+hLs+jLg+kLa+rLw describing the correlation of actual evapotranspiration with climate and land use/land cover variables. Li is the fraction of land cover type i within an individual HUC12. Parameter Values for Li: c 0.173, e 0.297, h 0.094, j 0.236, k 0.382, r 0.400 |
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Variable ID
variable.detail.varIdHelp
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10664 |
| Not applicable | |
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Qualitative-Quantitative
variable.detail.continuousCategoricalHelp
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Quantitative (Cardinal Only) |
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Cardinal-Ordinal
variable.detail.cardinalOrdinalHelp
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Cardinal |
| unitless |
Variable Typology
Land cover parameter ?Comment:Fixed parameter values for the regression equation (Sanford and Selnick 2013): AET = PΛ(τΔ/(τΔ+Π)) (2) Λ=1+cLd+eLf+hLs+jLg+kLa+rLw describing the correlation of actual evapotranspiration with climate and land use/land cover variables. Li is the fraction of land cover type i within an individual HUC12. Parameter Values for Li: c 0.173, e 0.297, h 0.094, j 0.236, k 0.382, r 0.400 |
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Predictor-Intermediate-Response
variable.detail.displayVariableTypeHelp
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Predictor |
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Predictor Variable Type
variable.detail.displayPredictorVariableTypeHelp
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Constant or Parameter |
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Response Variable Type
variable.detail.resClassHelp
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Not applicable |
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Data Source/Type
variable.detail.dataTypeHelp
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Derived as output of another model (and not found in a widely available database) ?Comment:Regression equation (Sanford and Selnick 2013) describing the correlation of actual evapotranspiration (AET) with climate and land use/land cover variables. |
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Variable Classification Hierarchy
variable.detail.vchLevel1Help
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2. Land Surface (or Water Body) Cover, Use, Substrate, or Metric |
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--Land use/land cover type or dominant habitat type |
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----Other, multiple, unspecified or unclear |
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Variable Spatial Characteristics
Land cover parameter ?Comment:Fixed parameter values for the regression equation (Sanford and Selnick 2013): AET = PΛ(τΔ/(τΔ+Π)) (2) Λ=1+cLd+eLf+hLs+jLg+kLa+rLw describing the correlation of actual evapotranspiration with climate and land use/land cover variables. Li is the fraction of land cover type i within an individual HUC12. Parameter Values for Li: c 0.173, e 0.297, h 0.094, j 0.236, k 0.382, r 0.400 |
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Spatial Extent Area
variable.detail.spExtentHelp
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Not recorded for Constant or Factor Variables |
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Spatially Distributed?
variable.detail.spDistributedHelp
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Not recorded for Constant or Factor Variables |
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Observations Spatially Patterned?
variable.detail.regularSpGrainHelp
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Not recorded for Constant or Factor Variables |
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Spatial Grain Type
variable.detail.spGrainTypeHelp
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Not recorded for Constant or Factor Variables |
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Spatial Grain Size
variable.detail.spGrainSizeHelp
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Not recorded for Constant or Factor Variables |
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Spatial Density
variable.detail.spDensityHelp
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Not recorded for Constant or Factor Variables |
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EnviroAtlas URL
variable.detail.enviroAtlasURLHelp
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Variable Temporal Characteristics
Land cover parameter ?Comment:Fixed parameter values for the regression equation (Sanford and Selnick 2013): AET = PΛ(τΔ/(τΔ+Π)) (2) Λ=1+cLd+eLf+hLs+jLg+kLa+rLw describing the correlation of actual evapotranspiration with climate and land use/land cover variables. Li is the fraction of land cover type i within an individual HUC12. Parameter Values for Li: c 0.173, e 0.297, h 0.094, j 0.236, k 0.382, r 0.400 |
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Temporal Extent
variable.detail.tempExtentHelp
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Not recorded for Constant or Factor Variables |
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Temporally Distributed?
variable.detail.tempDistributedHelp
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Not recorded for Constant or Factor Variables |
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Regular Temporal Grain?
variable.detail.regularTempGrainHelp
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Not recorded for Constant or Factor Variables |
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Temporal Grain Size Value
variable.detail.tempGrainSizeValHelp
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Not recorded for Constant or Factor Variables |
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Temporal Grain Size Units
variable.detail.tempGrainSizeUnitHelp
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Not recorded for Constant or Factor Variables |
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Temporal Density
variable.detail.tempDensityHelp
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Not recorded for Constant or Factor Variables |
Variable Values
Land cover parameter ?Comment:Fixed parameter values for the regression equation (Sanford and Selnick 2013): AET = PΛ(τΔ/(τΔ+Π)) (2) Λ=1+cLd+eLf+hLs+jLg+kLa+rLw describing the correlation of actual evapotranspiration with climate and land use/land cover variables. Li is the fraction of land cover type i within an individual HUC12. Parameter Values for Li: c 0.173, e 0.297, h 0.094, j 0.236, k 0.382, r 0.400 |
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unitless ?Comment:Parameter Values for Li: c 0.173, e 0.297, h 0.094, j 0.236, k 0.382, r 0.400 |
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Min Value
variable.detail.minEstHelp
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0.094 |
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Max Value
variable.detail.estHelp
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0.400 |
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Other Value Type
variable.detail.natureOtherEstHelp
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Not applicable |
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Other Value
variable.detail.otherEstHelp
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Not reported |
Variable Variability and Sensitivity
Land cover parameter ?Comment:Fixed parameter values for the regression equation (Sanford and Selnick 2013): AET = PΛ(τΔ/(τΔ+Π)) (2) Λ=1+cLd+eLf+hLs+jLg+kLa+rLw describing the correlation of actual evapotranspiration with climate and land use/land cover variables. Li is the fraction of land cover type i within an individual HUC12. Parameter Values for Li: c 0.173, e 0.297, h 0.094, j 0.236, k 0.382, r 0.400 |
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Variability Expression Given?
variable.detail.variabilityExpHelp
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Not recorded for Constant or Factor Variables |
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Variability Metric
variable.detail.variabilityMetricHelp
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None |
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Variability Value
variable.detail.variabilityValueHelp
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None |
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Variability Units
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None |
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Resampling Used?
variable.detail.bootstrappingHelp
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Not recorded for Constant or Factor Variables |
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Variability Expression Used in Modeling?
variable.detail.variabilityUsedHelp
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Not recorded for Constant or Factor Variables |
Variable Operational Validation (Response Variables only)
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Variable ID
variable.detail.varIdHelp
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Validated?
variable.detail.resValidatedHelp
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Validation Approach (within, between, etc.)
variable.detail.validationApproachHelp
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Validation Quality (Qual/Quant)
variable.detail.validationQualityHelp
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Validation Method (Stat/Deviance)
variable.detail.validationMethodHelp
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Validation Metric
variable.detail.validationMetricHelp
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Validation Value
variable.detail.validationValHelp
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Validation Units
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Use of Measured Response Data
variable.detail.measuredResponseDataHelp
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