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Variables Details
: (EM-627)
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EM Identity and Description
| EM-627 | |
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Document Author
variable.detail.emDocumentAuthorHelp
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Crumpton, W. G., G. A. Stenback, B. A. Miller, and M. J. Helmers |
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Document Year
variable.detail.emDocumentYearHelp
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2006 |
Variable General Info
Percent crop land ?Comment:Based on spatial analysis of 1992 Landsat land cover data for the UmR and Ohio River basins. This variable was used in the Flow Weighted Average (FWA) nitrate concentration based on land use submodel. |
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Variable ID
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14894 |
| Not reported | |
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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 |
| % |
Variable Typology
Percent crop land ?Comment:Based on spatial analysis of 1992 Landsat land cover data for the UmR and Ohio River basins. This variable was used in the Flow Weighted Average (FWA) nitrate concentration based on land use submodel. |
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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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Time- or Space-varying Variable |
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Response Variable Type
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Not applicable |
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Data Source/Type
variable.detail.dataTypeHelp
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Map or database (e.g., wide coverage, wide availability, measured or modeled) |
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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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----Agroecosystems |
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------Other, multiple, unspecified or unclear |
Variable Spatial Characteristics
Percent crop land ?Comment:Based on spatial analysis of 1992 Landsat land cover data for the UmR and Ohio River basins. This variable was used in the Flow Weighted Average (FWA) nitrate concentration based on land use submodel. |
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Spatial Extent Area
variable.detail.spExtentHelp
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>1,000,000 km^2 |
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Spatially Distributed?
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Yes |
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Observations Spatially Patterned?
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Yes |
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Spatial Grain Type
variable.detail.spGrainTypeHelp
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area, for pixel or radial feature |
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Spatial Grain Size
variable.detail.spGrainSizeHelp
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1 km2 |
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Spatial Density
variable.detail.spDensityHelp
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Not applicable |
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EnviroAtlas URL
variable.detail.enviroAtlasURLHelp
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GAP Ecological Systems |
Variable Temporal Characteristics
Percent crop land ?Comment:Based on spatial analysis of 1992 Landsat land cover data for the UmR and Ohio River basins. This variable was used in the Flow Weighted Average (FWA) nitrate concentration based on land use submodel. |
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Temporal Extent
variable.detail.tempExtentHelp
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1992 |
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Temporally Distributed?
variable.detail.tempDistributedHelp
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No |
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Regular Temporal Grain?
variable.detail.regularTempGrainHelp
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Not applicable |
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Temporal Grain Size Value
variable.detail.tempGrainSizeValHelp
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Not applicable |
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Temporal Grain Size Units
variable.detail.tempGrainSizeUnitHelp
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Not applicable |
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Temporal Density
variable.detail.tempDensityHelp
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Not applicable |
Variable Values
Percent crop land ?Comment:Based on spatial analysis of 1992 Landsat land cover data for the UmR and Ohio River basins. This variable was used in the Flow Weighted Average (FWA) nitrate concentration based on land use submodel. |
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| Not reported | |
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Min Value
variable.detail.minEstHelp
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Not reported |
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Max Value
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Not reported |
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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
Percent crop land ?Comment:Based on spatial analysis of 1992 Landsat land cover data for the UmR and Ohio River basins. This variable was used in the Flow Weighted Average (FWA) nitrate concentration based on land use submodel. |
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Variability Expression Given?
variable.detail.variabilityExpHelp
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No |
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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 applicable |
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Variability Expression Used in Modeling?
variable.detail.variabilityUsedHelp
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Not applicable |
Variable Operational Validation (Response Variables only)
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Variable ID
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Validated?
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Validation Approach (within, between, etc.)
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Validation Quality (Qual/Quant)
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Validation Method (Stat/Deviance)
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Validation Metric
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Validation Value
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Validation Units
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Use of Measured Response Data
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