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Variables Details
: (EM-659)
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EM Identity and Description
| EM-659 | |
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Document Author
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Trodahl, M. I., B. M. Jackson, J. R. Deslippe, and A. K. Metherell |
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Document Year
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2017 |
Variable General Info
Phosphorus export coefficient ?Comment:Water quality models within LUCI use an enhanced, spatially representative export co-efficient (EC) approach to model total nitrogen (TN) and total phosphorus (TP) exports to water. ECs are defined as the “mass of a [contaminant] per unit area per unit time and quantified in kg ha−1 yr−1. LUCI spatially positions ECs in association with land cover categories at the DEM scale (5 m2), and consider slope. Here, ECs for pastoral land cover are calculated by LUCI using algorithms derived from a large ( > 14 000 samples), pastorally based national dataset. The dataset consists of detailed farm nutrient input and management variables that have been entered and run using OVERSEER® to generate nutrient loss predictions, which are also included in the dataset. This variable is a constant based on the class variable Land use land cover. |
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Variable ID
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15490 |
| Not reported | |
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Qualitative-Quantitative
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Quantitative (Cardinal Only) |
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Cardinal-Ordinal
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Cardinal |
| kg P ha^-1 yr^-1 |
Variable Typology
Phosphorus export coefficient ?Comment:Water quality models within LUCI use an enhanced, spatially representative export co-efficient (EC) approach to model total nitrogen (TN) and total phosphorus (TP) exports to water. ECs are defined as the “mass of a [contaminant] per unit area per unit time and quantified in kg ha−1 yr−1. LUCI spatially positions ECs in association with land cover categories at the DEM scale (5 m2), and consider slope. Here, ECs for pastoral land cover are calculated by LUCI using algorithms derived from a large ( > 14 000 samples), pastorally based national dataset. The dataset consists of detailed farm nutrient input and management variables that have been entered and run using OVERSEER® to generate nutrient loss predictions, which are also included in the dataset. This variable is a constant based on the class variable Land use 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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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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Derived from a look-up table |
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Variable Classification Hierarchy
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4. Human-Produced Stressor or Enhancer of Ecosystem Goods and Services Production |
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--Human-caused release, presence or characteristics of polluting substances |
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----Release, presence or characteristics of phosphorus in air or water |
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Variable Spatial Characteristics
Phosphorus export coefficient ?Comment:Water quality models within LUCI use an enhanced, spatially representative export co-efficient (EC) approach to model total nitrogen (TN) and total phosphorus (TP) exports to water. ECs are defined as the “mass of a [contaminant] per unit area per unit time and quantified in kg ha−1 yr−1. LUCI spatially positions ECs in association with land cover categories at the DEM scale (5 m2), and consider slope. Here, ECs for pastoral land cover are calculated by LUCI using algorithms derived from a large ( > 14 000 samples), pastorally based national dataset. The dataset consists of detailed farm nutrient input and management variables that have been entered and run using OVERSEER® to generate nutrient loss predictions, which are also included in the dataset. This variable is a constant based on the class variable Land use land cover. |
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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
Phosphorus export coefficient ?Comment:Water quality models within LUCI use an enhanced, spatially representative export co-efficient (EC) approach to model total nitrogen (TN) and total phosphorus (TP) exports to water. ECs are defined as the “mass of a [contaminant] per unit area per unit time and quantified in kg ha−1 yr−1. LUCI spatially positions ECs in association with land cover categories at the DEM scale (5 m2), and consider slope. Here, ECs for pastoral land cover are calculated by LUCI using algorithms derived from a large ( > 14 000 samples), pastorally based national dataset. The dataset consists of detailed farm nutrient input and management variables that have been entered and run using OVERSEER® to generate nutrient loss predictions, which are also included in the dataset. This variable is a constant based on the class variable Land use land cover. |
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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
Phosphorus export coefficient ?Comment:Water quality models within LUCI use an enhanced, spatially representative export co-efficient (EC) approach to model total nitrogen (TN) and total phosphorus (TP) exports to water. ECs are defined as the “mass of a [contaminant] per unit area per unit time and quantified in kg ha−1 yr−1. LUCI spatially positions ECs in association with land cover categories at the DEM scale (5 m2), and consider slope. Here, ECs for pastoral land cover are calculated by LUCI using algorithms derived from a large ( > 14 000 samples), pastorally based national dataset. The dataset consists of detailed farm nutrient input and management variables that have been entered and run using OVERSEER® to generate nutrient loss predictions, which are also included in the dataset. This variable is a constant based on the class variable Land use land cover. |
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| kg P ha^-1 yr^-1 | |
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Min Value
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0.02 |
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Max Value
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2.2 |
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Other Value Type
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Not applicable |
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Other Value
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Not reported |
Variable Variability and Sensitivity
Phosphorus export coefficient ?Comment:Water quality models within LUCI use an enhanced, spatially representative export co-efficient (EC) approach to model total nitrogen (TN) and total phosphorus (TP) exports to water. ECs are defined as the “mass of a [contaminant] per unit area per unit time and quantified in kg ha−1 yr−1. LUCI spatially positions ECs in association with land cover categories at the DEM scale (5 m2), and consider slope. Here, ECs for pastoral land cover are calculated by LUCI using algorithms derived from a large ( > 14 000 samples), pastorally based national dataset. The dataset consists of detailed farm nutrient input and management variables that have been entered and run using OVERSEER® to generate nutrient loss predictions, which are also included in the dataset. This variable is a constant based on the class variable Land use land cover. |
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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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