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Variables Details
: (EM-435)
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EM Identity and Description
| EM-435 | |
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Document Author
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Amelia Smith, Susan Harrell Yee, Marc Russell, Jill Awkerman and William S. Fisher |
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Document Year
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2017 |
Variable General Info
| Digital elevation model | Land use land cover class | Rainfall erosivity index | Soil erodibility factor | Sub-watershed boundary | |
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Variable ID
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9178 | 9177 | 9186 | 9179 | 9184 |
| Not reported | Not reported | R | K | Not reported | |
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Qualitative-Quantitative
variable.detail.continuousCategoricalHelp
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Quantitative (Cardinal Only) | Qualitative (Class, Rating or Ranking) | Quantitative (Cardinal Only) | Quantitative (Cardinal Only) | Qualitative (Class, Rating or Ranking) |
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Cardinal-Ordinal
variable.detail.cardinalOrdinalHelp
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Cardinal | Non-Ordinal | Cardinal | Cardinal | Non-Ordinal |
| m | Not applicable | unitless | unitless | Not applicable |
Variable Typology
| Digital elevation model | Land use land cover class | Rainfall erosivity index | Soil erodibility factor | Sub-watershed boundary | |
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Predictor-Intermediate-Response
variable.detail.displayVariableTypeHelp
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Predictor |
Predictor |
Predictor |
Predictor |
Predictor |
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Predictor Variable Type
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Time- or Space-varying Variable |
Time- or Space-varying Variable |
Time- or Space-varying Variable |
Time- or Space-varying Variable |
Time- or Space-varying Variable |
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Response Variable Type
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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Data Source/Type
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Map or database (e.g., wide coverage, wide availability, measured or modeled) | Map or database (e.g., wide coverage, wide availability, measured or modeled) | Map or database (e.g., wide coverage, wide availability, measured or modeled) | Map or database (e.g., wide coverage, wide availability, measured or modeled) | 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 |
2. Land Surface (or Water Body) Cover, Use, Substrate, or Metric |
5. Ecosystem Attributes and Potential Supply of Ecosystem Goods and Services |
5. Ecosystem Attributes and Potential Supply of Ecosystem Goods and Services |
2. Land Surface (or Water Body) Cover, Use, Substrate, or Metric |
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--Geographic position, horizontal or vertical |
--Land use/land cover type or dominant habitat type |
--Physical/chemical characteristics of nonliving ecosystem components |
--Physical/chemical characteristics of nonliving ecosystem components |
--Demarcation of watershed, channel, floodplain, shore, coastline, flowline |
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----Elevation, altitude, bathymetry |
----Other, multiple, unspecified or unclear |
----Physical/chemical characteristics of soils, substrates, rocks |
----Physical/chemical characteristics of soils, substrates, rocks |
----Watershed demarcation or dimension |
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------Soil, slope or land stability or erosiveness |
------Soil, slope or land stability or erosiveness |
Variable Spatial Characteristics
| Digital elevation model | Land use land cover class | Rainfall erosivity index | Soil erodibility factor | Sub-watershed boundary | |
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Spatial Extent Area
variable.detail.spExtentHelp
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1000-10,000 km^2. | 1000-10,000 km^2. | 1000-10,000 km^2. | 1000-10,000 km^2. | 1000-10,000 km^2. |
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Spatially Distributed?
variable.detail.spDistributedHelp
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Yes | Yes | Yes | Yes | Yes |
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Observations Spatially Patterned?
variable.detail.regularSpGrainHelp
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Yes | Yes | Yes | Yes | Yes |
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Spatial Grain Type
variable.detail.spGrainTypeHelp
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area, for pixel or radial feature | area, for pixel or radial feature | area, for pixel or radial feature | area, for pixel or radial feature | Other (specify), for irregular (e.g., stream reach, lake basin) |
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Spatial Grain Size
variable.detail.spGrainSizeHelp
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30 m x 30 m | 30 m x 30 m | 30 m x 30 m | 30 m x 30 m | sub-watersheds |
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Spatial Density
variable.detail.spDensityHelp
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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EnviroAtlas URL
variable.detail.enviroAtlasURLHelp
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The Watershed Boundary Dataset (WBD) |
Variable Temporal Characteristics
| Digital elevation model | Land use land cover class | Rainfall erosivity index | Soil erodibility factor | Sub-watershed boundary | |
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Temporal Extent
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2006 | 2008 | 2011 | 2011 | Not reported |
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Temporally Distributed?
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No | No | No | No | Not applicable |
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Regular Temporal Grain?
variable.detail.regularTempGrainHelp
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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Temporal Grain Size Value
variable.detail.tempGrainSizeValHelp
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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Temporal Grain Size Units
variable.detail.tempGrainSizeUnitHelp
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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Temporal Density
variable.detail.tempDensityHelp
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
Variable Values
| Digital elevation model | Land use land cover class | Rainfall erosivity index | Soil erodibility factor | Sub-watershed boundary | |
| Not reported | Not applicable | Not reported | Not reported | Not applicable | |
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Min Value
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Not reported | Not applicable | Not reported | Not reported | Not applicable |
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Max Value
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Not reported | Not applicable | Not reported | Not reported | Not applicable |
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Other Value Type
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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Other Value
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Not applicable | Not applicable | Not reported | Not reported | Not applicable |
Variable Variability and Sensitivity
| Digital elevation model | Land use land cover class | Rainfall erosivity index | Soil erodibility factor | Sub-watershed boundary | |
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Variability Expression Given?
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Not applicable | Not applicable | No | Not applicable | Not applicable |
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Variability Metric
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None | None | None | None | None |
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Variability Value
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None | None | None | None | None |
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Variability Units
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None | None | None | None | None |
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Resampling Used?
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Not applicable | Not applicable | Not applicable | Not applicable | Not applicable |
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Variability Expression Used in Modeling?
variable.detail.variabilityUsedHelp
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Not applicable | Not applicable | Not applicable | Not applicable | 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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