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: (EM-632)
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EM-632: Assessment of environmental services of CREP wetlands in Iowa and the midwestern corn belt
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EM Identity and Description
| EM-632 | |
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Document Author
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Otis, D. L., W. G. Crumpton, D. Green, A. K. Loan-Wilsey, R. L. McNeely, K. L. Kane, R. Johnson, T. Cooper, and M. Vandever |
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Document Year
variable.detail.emDocumentYearHelp
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2010 |
Variable General Info
Natural log of wetland size ?Comment:For each of 27 separate wetland sites of varying size, GIS-based land cover developed from 2002 Landsat imagery was used to classify land cover. Polygon coverages of the CREP wetlands and buffers were aquired from the Iowa Department of Agriculture and Land Stewardship (2007) and added to the 2002 land cover. |
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Variable ID
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15028 |
| x | |
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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 |
| Not reported |
Variable Typology
Natural log of wetland size ?Comment:For each of 27 separate wetland sites of varying size, GIS-based land cover developed from 2002 Landsat imagery was used to classify land cover. Polygon coverages of the CREP wetlands and buffers were aquired from the Iowa Department of Agriculture and Land Stewardship (2007) and added to the 2002 land cover. |
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Predictor-Intermediate-Response
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Predictor |
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Predictor Variable Type
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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
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Local field/Lab data (e.g., particular to the EM study) |
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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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--Spatial resolution or extent of cell, pixel, polygon |
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Variable Spatial Characteristics
Natural log of wetland size ?Comment:For each of 27 separate wetland sites of varying size, GIS-based land cover developed from 2002 Landsat imagery was used to classify land cover. Polygon coverages of the CREP wetlands and buffers were aquired from the Iowa Department of Agriculture and Land Stewardship (2007) and added to the 2002 land cover. |
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Spatial Extent Area
variable.detail.spExtentHelp
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1-10 km^2 ?Comment:For each of 27 separate wetland sites of varying size, GIS-based land cover developed from 2002 Landsat imagery was used to classify land cover at a 15 m2 pixel size. Polygon coverages of the CREP wetlands and buffers were aquired from the Iowa Department of Agriculture and Land Stewardship (2007) and added to the 2002 land cover. |
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Spatially Distributed?
variable.detail.spDistributedHelp
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Yes |
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Observations Spatially Patterned?
variable.detail.regularSpGrainHelp
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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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15 m2 |
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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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Variable Temporal Characteristics
Natural log of wetland size ?Comment:For each of 27 separate wetland sites of varying size, GIS-based land cover developed from 2002 Landsat imagery was used to classify land cover. Polygon coverages of the CREP wetlands and buffers were aquired from the Iowa Department of Agriculture and Land Stewardship (2007) and added to the 2002 land cover. |
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Temporal Extent
variable.detail.tempExtentHelp
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2002-2007 |
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Temporally Distributed?
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Not applicable |
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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
Natural log of wetland size ?Comment:For each of 27 separate wetland sites of varying size, GIS-based land cover developed from 2002 Landsat imagery was used to classify land cover. Polygon coverages of the CREP wetlands and buffers were aquired from the Iowa Department of Agriculture and Land Stewardship (2007) and added to the 2002 land cover. |
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| Not reported | |
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Min Value
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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
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Not reported |
Variable Variability and Sensitivity
Natural log of wetland size ?Comment:For each of 27 separate wetland sites of varying size, GIS-based land cover developed from 2002 Landsat imagery was used to classify land cover. Polygon coverages of the CREP wetlands and buffers were aquired from the Iowa Department of Agriculture and Land Stewardship (2007) and added to the 2002 land cover. |
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Variability Expression Given?
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No |
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Variability Metric
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None |
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Variability Value
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None |
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Variability Units
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None |
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Resampling Used?
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Not applicable |
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Variability Expression Used in Modeling?
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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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