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EM-51: EnviroAtlas - Featured Community

EM Identity and Description

EM ID variable.detail.emIdHelp ?	EM-51
Document Author variable.detail.emDocumentAuthorHelp ?	US EPA Office of Research and Development - National Exposure Research Laboratory
Document Year variable.detail.emDocumentYearHelp ?	2013

Variable General Info

Name variable.detail.varNameHelp ?	Census block group ? Comment: Derived from durnam_bgrp database.	Pollutant ? Comment: Pollutant is a class variable. Runs are entered for the following pollutants; total suspended solids (TSS), total phosphorus, soluble phosphorus, nitrites and nitrates, total Kjeldahl nitrogen (TKN), biochemical oxygen demand (BOD5), chemical oxygen demand (COD5), and copper.	Reduction in annual runoff (census block group) ? Comment: Computed for the EnviroAtlas water recharge coverage using i-Tree Hydro model stream flow (runoff) output incorporating the range of tree canopy and impervious cover.	Pollutant pooled mean event-mean concentration ? Comment: Variable values are reported by pollutant type, a class variable which distinguishes the different Runs for this model.	Pollutant pooled median event-mean concentration ? Comment: Variable values are reported by pollutant type, a class variable which distinguishes the different Runs for this model.	Reduction in pollutant mean load (census block group) ? Comment: Under EnviroAtlas community category/subcategory of "Clean and Plentiful Water/Natural Filtration", for 2008 streamflow. Runs entered separately for each pollutant type.	Reduction in pollutant median load (census block group) ? Comment: Under EnviroAtlas community category/subcategory of "Clean and Plentiful Water/Natural Filtration", for 2008 streamflow. Runs entered separately for each pollutant type.
Variable ID variable.detail.varIdHelp ?	5303	10651	5300	5298	5368	743	744
Symbol variable.detail.varSymbolHelp ?	Not reported	Not reported	Not reported	Not reported	Not reported	Not reported	Not reported
Qualitative-Quantitative variable.detail.continuousCategoricalHelp ?	Qualitative (Class, Rating or Ranking)	Qualitative (Class, Rating or Ranking)	Quantitative (Cardinal Only)	Quantitative (Cardinal Only)	Quantitative (Cardinal Only)	Quantitative (Cardinal Only)	Quantitative (Cardinal Only)
Cardinal-Ordinal variable.detail.cardinalOrdinalHelp ?	Non-Ordinal	Non-Ordinal	Cardinal	Cardinal	Cardinal	Cardinal	Cardinal
Units variable.detail.varUnitsHelp ?	Not applicable	Not applicable	m^3 yr^-1	mg l^-1	mg l^-1	kg/year	kg/year

Variable Typology

Name variable.detail.varNameHelp ?	Census block group ? Comment: Derived from durnam_bgrp database.	Pollutant ? Comment: Pollutant is a class variable. Runs are entered for the following pollutants; total suspended solids (TSS), total phosphorus, soluble phosphorus, nitrites and nitrates, total Kjeldahl nitrogen (TKN), biochemical oxygen demand (BOD5), chemical oxygen demand (COD5), and copper.	Reduction in annual runoff (census block group) ? Comment: Computed for the EnviroAtlas water recharge coverage using i-Tree Hydro model stream flow (runoff) output incorporating the range of tree canopy and impervious cover.	Pollutant pooled mean event-mean concentration ? Comment: Variable values are reported by pollutant type, a class variable which distinguishes the different Runs for this model.	Pollutant pooled median event-mean concentration ? Comment: Variable values are reported by pollutant type, a class variable which distinguishes the different Runs for this model.	Reduction in pollutant mean load (census block group) ? Comment: Under EnviroAtlas community category/subcategory of "Clean and Plentiful Water/Natural Filtration", for 2008 streamflow. Runs entered separately for each pollutant type.	Reduction in pollutant median load (census block group) ? Comment: Under EnviroAtlas community category/subcategory of "Clean and Plentiful Water/Natural Filtration", for 2008 streamflow. Runs entered separately for each pollutant type.
Predictor-Intermediate-Response variable.detail.displayVariableTypeHelp ?	Predictor	Predictor	Predictor	Predictor	Predictor	Response	Response
Predictor Variable Type variable.detail.displayPredictorVariableTypeHelp ?	Time- or Space-varying Variable	Time- or Space-varying Variable	Time- or Space-varying Variable	Constant or Parameter	Constant or Parameter	Not applicable	Not applicable
Response Variable Type variable.detail.resClassHelp ?	Not applicable	Not applicable	Not applicable	Not applicable	Not applicable	Computed Variable	Computed Variable
Data Source/Type variable.detail.dataTypeHelp ?	Map or database (e.g., wide coverage, wide availability, measured or modeled) ? Comment: Derived from durnam_bgrp database.	Local field/Lab data (e.g., particular to the EM study)	Derived as output of another model (and not found in a widely available database) ? Comment: Computed for the EnviroAtlas water recharge coverage using i-Tree Hydro model stream flow (runoff) output incorporating the range of tree canopy and impervious cover.	Derived from meta-analysis (i.e., multi-study, multi-location)	Derived from meta-analysis (i.e., multi-study, multi-location)	Not applicable	Not applicable
Variable Classification Hierarchy variable.detail.vchLevel1Help ?	N. Not classified	4. Human-Produced Stressor or Enhancer of Ecosystem Goods and Services Production	5. Ecosystem Attributes and Potential Supply of Ecosystem Goods and Services	4. Human-Produced Stressor or Enhancer of Ecosystem Goods and Services Production	4. Human-Produced Stressor or Enhancer of Ecosystem Goods and Services Production	5. Ecosystem Attributes and Potential Supply of Ecosystem Goods and Services	5. Ecosystem Attributes and Potential Supply of Ecosystem Goods and Services
		--Human-caused release, presence or characteristics of polluting substances	--Physical/chemical characteristics of nonliving ecosystem components	--Human-caused release, presence or characteristics of polluting substances	--Human-caused release, presence or characteristics of polluting substances	--CICES categories: Ecosystem goods and services - or landscape-level indices of suitability to supply EGS	--CICES categories: Ecosystem goods and services - or landscape-level indices of suitability to supply EGS
		----Other, multiple, unspecified or unclear	----Physical/chemical characteristics of water	----Other, multiple, unspecified or unclear	----Other, multiple, unspecified or unclear	----Suitability to supply regulation & maintenance services-Mediation of wastes	----Suitability to supply regulation & maintenance services-Mediation of wastes
			------Water volume or flow over ground surface (i.e., runoff)			------Filtration/sequestration/storage/accumulation by ecosystems	------Filtration/sequestration/storage/accumulation by ecosystems

Variable Spatial Characteristics

Name variable.detail.varNameHelp ?	Census block group ? Comment: Derived from durnam_bgrp database.	Pollutant ? Comment: Pollutant is a class variable. Runs are entered for the following pollutants; total suspended solids (TSS), total phosphorus, soluble phosphorus, nitrites and nitrates, total Kjeldahl nitrogen (TKN), biochemical oxygen demand (BOD5), chemical oxygen demand (COD5), and copper.	Reduction in annual runoff (census block group) ? Comment: Computed for the EnviroAtlas water recharge coverage using i-Tree Hydro model stream flow (runoff) output incorporating the range of tree canopy and impervious cover.	Pollutant pooled mean event-mean concentration ? Comment: Variable values are reported by pollutant type, a class variable which distinguishes the different Runs for this model.	Pollutant pooled median event-mean concentration ? Comment: Variable values are reported by pollutant type, a class variable which distinguishes the different Runs for this model.	Reduction in pollutant mean load (census block group) ? Comment: Under EnviroAtlas community category/subcategory of "Clean and Plentiful Water/Natural Filtration", for 2008 streamflow. Runs entered separately for each pollutant type.	Reduction in pollutant median load (census block group) ? Comment: Under EnviroAtlas community category/subcategory of "Clean and Plentiful Water/Natural Filtration", for 2008 streamflow. Runs entered separately for each pollutant type.
Spatial Extent Area variable.detail.spExtentHelp ?	100-1000 km^2	100-1000 km^2	100-1000 km^2	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	100-1000 km^2	100-1000 km^2
Spatially Distributed? variable.detail.spDistributedHelp ?	Yes	No	Yes	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Yes	Yes
Observations Spatially Patterned? variable.detail.regularSpGrainHelp ?	No	Not applicable	No	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	No	No
Spatial Grain Type variable.detail.spGrainTypeHelp ?	Not applicable	Not applicable	Not applicable	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not applicable	Not applicable
Spatial Grain Size variable.detail.spGrainSizeHelp ?	Not applicable	Not applicable	Not applicable	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not applicable	Not applicable
Spatial Density variable.detail.spDensityHelp ?	193 census blocks covering 569.4 km^2	Not applicable	193 census blocks covering 569.4 km^2	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	193 census blocks covering 569.4 km^2	193 census blocks covering 569.4 km^2
EnviroAtlas URL variable.detail.enviroAtlasURLHelp ?

Variable Temporal Characteristics

Name variable.detail.varNameHelp ?	Census block group ? Comment: Derived from durnam_bgrp database.	Pollutant ? Comment: Pollutant is a class variable. Runs are entered for the following pollutants; total suspended solids (TSS), total phosphorus, soluble phosphorus, nitrites and nitrates, total Kjeldahl nitrogen (TKN), biochemical oxygen demand (BOD5), chemical oxygen demand (COD5), and copper.	Reduction in annual runoff (census block group) ? Comment: Computed for the EnviroAtlas water recharge coverage using i-Tree Hydro model stream flow (runoff) output incorporating the range of tree canopy and impervious cover.	Pollutant pooled mean event-mean concentration ? Comment: Variable values are reported by pollutant type, a class variable which distinguishes the different Runs for this model.	Pollutant pooled median event-mean concentration ? Comment: Variable values are reported by pollutant type, a class variable which distinguishes the different Runs for this model.	Reduction in pollutant mean load (census block group) ? Comment: Under EnviroAtlas community category/subcategory of "Clean and Plentiful Water/Natural Filtration", for 2008 streamflow. Runs entered separately for each pollutant type.	Reduction in pollutant median load (census block group) ? Comment: Under EnviroAtlas community category/subcategory of "Clean and Plentiful Water/Natural Filtration", for 2008 streamflow. Runs entered separately for each pollutant type.
Temporal Extent variable.detail.tempExtentHelp ?	2010	2008-2010	2008-2010	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	2008-2010	2008-2010
Temporally Distributed? variable.detail.tempDistributedHelp ?	Not applicable	Not applicable	Not applicable	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	No	No
Regular Temporal Grain? variable.detail.regularTempGrainHelp ?	Not applicable	Not applicable	Not applicable	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not applicable	Not applicable
Temporal Grain Size Value variable.detail.tempGrainSizeValHelp ?	Not applicable	Not applicable	Not applicable	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not applicable	Not applicable
Temporal Grain Size Units variable.detail.tempGrainSizeUnitHelp ?	Not applicable	Not applicable	Not applicable	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not applicable	Not applicable
Temporal Density variable.detail.tempDensityHelp ?	Not applicable	Not applicable	Not applicable	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not applicable	Not applicable

Variable Values

Name variable.detail.varNameHelp ?	Census block group ? Comment: Derived from durnam_bgrp database.	Pollutant ? Comment: Pollutant is a class variable. Runs are entered for the following pollutants; total suspended solids (TSS), total phosphorus, soluble phosphorus, nitrites and nitrates, total Kjeldahl nitrogen (TKN), biochemical oxygen demand (BOD5), chemical oxygen demand (COD5), and copper.	Reduction in annual runoff (census block group) ? Comment: Computed for the EnviroAtlas water recharge coverage using i-Tree Hydro model stream flow (runoff) output incorporating the range of tree canopy and impervious cover.	Pollutant pooled mean event-mean concentration ? Comment: Variable values are reported by pollutant type, a class variable which distinguishes the different Runs for this model.	Pollutant pooled median event-mean concentration ? Comment: Variable values are reported by pollutant type, a class variable which distinguishes the different Runs for this model.	Reduction in pollutant mean load (census block group) ? Comment: Under EnviroAtlas community category/subcategory of "Clean and Plentiful Water/Natural Filtration", for 2008 streamflow. Runs entered separately for each pollutant type.	Reduction in pollutant median load (census block group) ? Comment: Under EnviroAtlas community category/subcategory of "Clean and Plentiful Water/Natural Filtration", for 2008 streamflow. Runs entered separately for each pollutant type.
Units variable.detail.estUnitHelp ?	Not applicable	Not applicable	m^3 yr^-1 ? Comment: Values derived from the EnviroAtlas water recharge coverage.	Not reported	Not reported	kg/year	kg/year
Min Value variable.detail.minEstHelp ?	Not applicable	Not applicable	1,824	Not reported	Not reported	Varies by Run; view Runs to see values	Varies by Run; view Runs to see values
Max Value variable.detail.estHelp ?	Not applicable	Not applicable	288,488	Not reported	Not reported	Varies by Run; view Runs to see values	Varies by Run; view Runs to see values
Other Value Type variable.detail.natureOtherEstHelp ?	Not applicable	Not applicable	Not applicable	Mean	Median	Not applicable	Not applicable
Other Value variable.detail.otherEstHelp ?	Not applicable	Not applicable	Not reported	Varies by Run; view Runs to see values	Varies by Run; view Runs to see values	Not reported	Not reported

Variable Variability and Sensitivity

Name variable.detail.varNameHelp ?	Census block group ? Comment: Derived from durnam_bgrp database.	Pollutant ? Comment: Pollutant is a class variable. Runs are entered for the following pollutants; total suspended solids (TSS), total phosphorus, soluble phosphorus, nitrites and nitrates, total Kjeldahl nitrogen (TKN), biochemical oxygen demand (BOD5), chemical oxygen demand (COD5), and copper.	Reduction in annual runoff (census block group) ? Comment: Computed for the EnviroAtlas water recharge coverage using i-Tree Hydro model stream flow (runoff) output incorporating the range of tree canopy and impervious cover.	Pollutant pooled mean event-mean concentration ? Comment: Variable values are reported by pollutant type, a class variable which distinguishes the different Runs for this model.	Pollutant pooled median event-mean concentration ? Comment: Variable values are reported by pollutant type, a class variable which distinguishes the different Runs for this model.	Reduction in pollutant mean load (census block group) ? Comment: Under EnviroAtlas community category/subcategory of "Clean and Plentiful Water/Natural Filtration", for 2008 streamflow. Runs entered separately for each pollutant type.	Reduction in pollutant median load (census block group) ? Comment: Under EnviroAtlas community category/subcategory of "Clean and Plentiful Water/Natural Filtration", for 2008 streamflow. Runs entered separately for each pollutant type.
Variability Expression Given? variable.detail.variabilityExpHelp ?	Not applicable	Not applicable	No	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	No	No
Variability Metric variable.detail.variabilityMetricHelp ?	None	None	None	None	None	None	None
Variability Value variable.detail.variabilityValueHelp ?	None	None	None	None	None	None	None
Variability Units	None	None	None	None	None	None	None
Resampling Used? variable.detail.bootstrappingHelp ?	Not applicable	Not applicable	Not applicable	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not applicable	Not applicable
Variability Expression Used in Modeling? variable.detail.variabilityUsedHelp ?	Not applicable	Not applicable	Not applicable	Not recorded for Constant or Factor Variables	Not recorded for Constant or Factor Variables	Not applicable	Not applicable

Variable Operational Validation (Response Variables only)

Name variable.detail.varNameHelp ?	Reduction in pollutant mean load (census block group)	Reduction in pollutant median load (census block group)
Variable ID variable.detail.varIdHelp ?	743	744
Validated? variable.detail.resValidatedHelp ?	Not applicable	Not applicable
Validation Approach (within, between, etc.) variable.detail.validationApproachHelp ?	None	None
Validation Quality (Qual/Quant) variable.detail.validationQualityHelp ?	None	None
Validation Method (Stat/Deviance) variable.detail.validationMethodHelp ?	None	None
Validation Metric variable.detail.validationMetricHelp ?	None	None
Validation Value variable.detail.validationValHelp ?	None	None
Validation Units	None	None
Use of Measured Response Data variable.detail.measuredResponseDataHelp ?	None	None