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Variables Details
: (EM-942)
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EM Identity and Description
| EM-942 | |
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Document Author
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Hashad, K. B. Yang, J. T. Steffens, R. W. Baldauf, P. Deshmukh, K. M. Zhang |
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Document Year
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2021 |
Variable General Info
Leaf area density (maximum) ?Comment:There are two parameters characterizing the vegetation density, i.e., leaf area density (LAD) and leaf area index (LAI). The LAD describes the leaves surface area per unit volume within the vegetation, and it is used to evaluate the vegetation drag on the flow, and particle deposition on the vegetation as highlighted in the following sections. The LAD profile for conifers vegetation was used following Equation 1 (Lalic and Mihailovic, 2004). |
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Variable ID
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23174 |
| Lm | |
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Qualitative-Quantitative
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Quantitative (Cardinal Only) |
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Cardinal-Ordinal
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Cardinal |
| Not reported |
Variable Typology
Leaf area density (maximum) ?Comment:There are two parameters characterizing the vegetation density, i.e., leaf area density (LAD) and leaf area index (LAI). The LAD describes the leaves surface area per unit volume within the vegetation, and it is used to evaluate the vegetation drag on the flow, and particle deposition on the vegetation as highlighted in the following sections. The LAD profile for conifers vegetation was used following Equation 1 (Lalic and Mihailovic, 2004). |
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Predictor-Intermediate-Response
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Predictor |
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Predictor Variable Type
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Constant or Parameter |
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Response Variable Type
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Not applicable |
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Data Source/Type
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Not applicable |
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Variable Classification Hierarchy
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5. Ecosystem Attributes and Potential Supply of Ecosystem Goods and Services |
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--Biological characteristics, processes or requirements of living ecosystem components |
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----Biological characteristics, processes or requirements of flora and fungi |
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------Cover characteristics (canopy cover, herbaceous cover or leaf area) |
Variable Spatial Characteristics
Leaf area density (maximum) ?Comment:There are two parameters characterizing the vegetation density, i.e., leaf area density (LAD) and leaf area index (LAI). The LAD describes the leaves surface area per unit volume within the vegetation, and it is used to evaluate the vegetation drag on the flow, and particle deposition on the vegetation as highlighted in the following sections. The LAD profile for conifers vegetation was used following Equation 1 (Lalic and Mihailovic, 2004). |
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Spatial Extent Area
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Not recorded for Constant or Parameter Variables |
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Spatially Distributed?
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Not recorded for Constant or Parameter Variables |
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Observations Spatially Patterned?
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Not recorded for Constant or Parameter Variables |
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Spatial Grain Type
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Not recorded for Constant or Paarameter Variables |
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Spatial Grain Size
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Not recorded for Constant or Parameter Variables |
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Spatial Density
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Not recorded for Constant or Parameter Variables |
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EnviroAtlas URL
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Variable Temporal Characteristics
Leaf area density (maximum) ?Comment:There are two parameters characterizing the vegetation density, i.e., leaf area density (LAD) and leaf area index (LAI). The LAD describes the leaves surface area per unit volume within the vegetation, and it is used to evaluate the vegetation drag on the flow, and particle deposition on the vegetation as highlighted in the following sections. The LAD profile for conifers vegetation was used following Equation 1 (Lalic and Mihailovic, 2004). |
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Temporal Extent
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Not recorded for Constant or Parameter Variables |
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Temporally Distributed?
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Not recorded for Constant or Parameter Variables |
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Regular Temporal Grain?
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Not recorded for Constant or Parameter Variables |
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Temporal Grain Size Value
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Not recorded for Constant or Parameter Variables |
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Temporal Grain Size Units
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Not recorded for Constant or Parameter Variables |
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Temporal Density
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Not recorded for Constant or Parameter Variables |
Variable Values
Leaf area density (maximum) ?Comment:There are two parameters characterizing the vegetation density, i.e., leaf area density (LAD) and leaf area index (LAI). The LAD describes the leaves surface area per unit volume within the vegetation, and it is used to evaluate the vegetation drag on the flow, and particle deposition on the vegetation as highlighted in the following sections. The LAD profile for conifers vegetation was used following Equation 1 (Lalic and Mihailovic, 2004). |
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| Not applicable | |
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Min Value
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Not applicable |
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Max Value
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Not applicable |
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Other Value Type
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Not applicable |
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Other Value
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Not applicable |
Variable Variability and Sensitivity
Leaf area density (maximum) ?Comment:There are two parameters characterizing the vegetation density, i.e., leaf area density (LAD) and leaf area index (LAI). The LAD describes the leaves surface area per unit volume within the vegetation, and it is used to evaluate the vegetation drag on the flow, and particle deposition on the vegetation as highlighted in the following sections. The LAD profile for conifers vegetation was used following Equation 1 (Lalic and Mihailovic, 2004). |
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Variability Expression Given?
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Not recorded for Constant or Parameter Variables |
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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 recorded for Constant or Parameter Variables |
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Variability Expression Used in Modeling?
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Not recorded for Constant or Parameter Variables |
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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