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EM: SPARROW (SPAtially Referenced Regressions On Watershed Attributes), Northeastern USA (EM-104)
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EM Identity and Description
EM Identification
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EM ID
em.detail.idHelp
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EM-104 |
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EM Short Name
em.detail.shortNameHelp
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SPARROW, Northeastern USA |
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EM Full Name
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SPARROW (SPAtially Referenced Regressions On Watershed Attributes), Northeastern USA |
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EM Source or Collection
em.detail.emSourceOrCollectionHelp
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US EPA |
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EM Source Document ID
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86 |
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Document Author
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Moore, R. B., Johnston, C.M., Smith, R. A. and Milstead, B. |
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Document Year
em.detail.documentYearHelp
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2011 |
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Document Title
em.detail.sourceIdHelp
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Source and delivery of nutrients to receiving waters in the northeastern and mid-Atlantic regions of the United States |
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Document Status
em.detail.statusCategoryHelp
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Peer reviewed and published |
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Comments on Status
em.detail.commentsOnStatusHelp
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Published journal manuscript |
Software and Access
| Not applicable | |
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Contact Name
em.detail.contactNameHelp
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Richard Moore |
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Contact Address
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U.S. Environmental Protection Agency, 27 Tarzwell Drive, Narragansett, Rhode Island 02882 |
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Contact Email
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rmoore@usgs.gov |
EM Description
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Summary Description
em.detail.summaryDescriptionHelp
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AUTHOR'S DESCRIPTION: "SPAtially Referenced Regressions On Watershed attributes (SPARROW) nutrient models were developed for the Northeastern and Mid-Atlantic (NE US) regions of the United States to represent source conditions for the year 2002. The model developed to examine the source and delivery of nitrogen to the estuaries of nine large rivers along the NE US Seaboard indicated that agricultural sources contribute the largest percentage (37%) of the total nitrogen load delivered to the estuaries" |
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Specific Policy or Decision Context Cited
em.detail.policyDecisionContextHelp
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water-quality assessment, total maximum daily load(TMDL) determination |
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Biophysical Context
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Norteneastern region (U.S.); Mid-Atlantic region (U.S.) |
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EM Scenario Drivers
em.detail.scenarioDriverHelp
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No scenarios presented |
EM Relationship to Other EMs or Applications
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Method Only, Application of Method or Model Run
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Method + Application |
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New or Pre-existing EM?
em.detail.newOrExistHelp
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Application of existing model |
Related EMs (for example, other versions or derivations of this EM) described in ESML
em.detail.relatedEmHelp
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Document ID for related EM
em.detail.relatedEmDocumentIdHelp
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None |
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EM ID for related EM
em.detail.relatedEmEmIdHelp
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None |
EM Modeling Approach
EM Relationship to Time
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EM Temporal Extent
em.detail.tempExtentHelp
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2002 ?Comment:Several nationwide database development and modeling efforts were necessary to create models consistent with 2002 conditions. |
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EM Time Dependence
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time-stationary |
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EM Time Reference (Future/Past)
em.detail.futurePastHelp
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Not applicable |
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EM Time Continuity
em.detail.continueDiscreteHelp
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Not applicable |
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EM Temporal Grain Size Value
em.detail.tempGrainSizeHelp
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Not applicable |
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EM Temporal Grain Size Unit
em.detail.tempGrainSizeUnitHelp
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Not applicable |
EM Spatial Extent
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Bounding Type
em.detail.boundingTypeHelp
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Geopolitical |
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Spatial Extent Name
em.detail.extentNameHelp
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NE U.S. Regions |
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Spatial Extent Area (Magnitude)
em.detail.extentAreaHelp
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>1,000,000 km^2 |
Spatial Distribution of Computations
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EM Spatial Distribution
em.detail.distributeLumpHelp
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spatially distributed (in at least some cases) |
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Spatial Grain Type
em.detail.spGrainTypeHelp
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area, for pixel or radial feature |
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Spatial Grain Size
em.detail.spGrainSizeHelp
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30 x 30 m |
EM Structure and Computation Approach
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EM Computational Approach
em.detail.emComputationalApproachHelp
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Analytic |
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EM Determinism
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deterministic |
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Statistical Estimation of EM
em.detail.statisticalEstimationHelp
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Model Checking Procedures Used
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Model Calibration Reported?
em.detail.calibrationHelp
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Yes |
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Model Goodness of Fit Reported?
em.detail.goodnessFitHelp
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Yes ?Comment:R-squared of .97 refers to the modelled loading whereas .83 refers to yield (see table 1, pg 972 for more information) |
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Goodness of Fit (metric| value | unit)
em.detail.goodnessFitValuesHelp
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Model Operational Validation Reported?
em.detail.validationHelp
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Yes |
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Model Uncertainty Analysis Reported?
em.detail.uncertaintyAnalysisHelp
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Unclear |
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Model Sensitivity Analysis Reported?
em.detail.sensAnalysisHelp
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Yes |
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Model Sensitivity Analysis Include Interactions?
em.detail.interactionConsiderHelp
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Unclear |
EM Locations, Environments, Ecology
Location of EM Application
Terrestrial location (Classification hierarchy: Continent > Country > U.S. State [United States only])
em.detail.relationToSpaceTerrestrialHelp
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Marine location (Classification hierarchy: Realm > Region > Province > Ecoregion)
em.detail.relationToSpaceMarineHelp
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| None |
Centroid Lat/Long (Decimal Degree)
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Centroid Latitude
em.detail.ddLatHelp
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42 |
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Centroid Longitude
em.detail.ddLongHelp
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-73 |
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Centroid Datum
em.detail.datumHelp
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WGS84 |
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Centroid Coordinates Status
em.detail.coordinateStatusHelp
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Estimated |
Environments and Scales Modeled
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EM Environmental Sub-Class
em.detail.emEnvironmentalSubclassHelp
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Rivers and Streams | Ground Water | Terrestrial Environment (sub-classes not fully specified) | Agroecosystems | Atmosphere |
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Specific Environment Type
em.detail.specificEnvTypeHelp
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none |
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EM Ecological Scale
em.detail.ecoScaleHelp
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Ecological scale is coarser than that of the Environmental Sub-class |
Scale and taxa of organisms modeled
Scale of differentiation of organisms modeled
em.detail.nameOfOrgsOrGroupsHelp
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EM Organismal Scale
em.detail.orgScaleHelp
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Not applicable |
Taxonomic level and name of organisms or groups identified
taxonomyHelp
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| None Available |
EnviroAtlas URL
em.detail.enviroAtlasURLHelp
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| National Hydrography Dataset Plus (NHD PlusV2), Average Annual Precipitation, U.S. EPA (Omernik) ecoregions, Total Annual Nitrogen Deposition |
EM Ecosystem Goods and Services (EGS) potentially modeled, by classification system
CICES v 4.3 - Common International Classification of Ecosystem Services (Section > Division > Group > Class)
em.detail.cicesHelp
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(Environmental Subclass > Ecological End-Product (EEP) > EEP Subclass > EEP Modifier)
fegs2Help
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EM Variable Names (and Units)
Predictor
em.detail.variablesPredictorHelp
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Intermediate
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Intermediate (Computed) Variables (and Units)
view details (1 variable)
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Response
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Observed Response Variables (and Units)
view details (1 variable)
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Computed Response Variables (and Units)
em.detail.computedResponseHelp
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None |