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EM: SWAT (Soil and Water Assessment Tool) Guánica Bay, Puerto Rico, USA (EM-417)
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EM Identity and Description
EM Identification
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EM ID
em.detail.idHelp
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EM-417 |
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EM Short Name
em.detail.shortNameHelp
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SWAT, Guanica Bay, Puerto Rico, USA |
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EM Full Name
em.detail.fullNameHelp
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SWAT (Soil and Water Assessment Tool) Guánica Bay, Puerto Rico, 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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334 |
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Document Author
em.detail.documentAuthorHelp
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Hu, W. and Y. Yuan |
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Document Year
em.detail.documentYearHelp
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2013 |
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Document Title
em.detail.sourceIdHelp
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Evaluation of Soil Erosion and Sediment Yield for the Ridge Watersheds in the Guanica Bay Watershed, Puerto Rico, Using the SWAT Model |
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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 EPA report |
Software and Access
| Not applicable | |
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Contact Name
em.detail.contactNameHelp
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Yongping Yuan |
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Contact Address
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USEPA, ORD, NERL, Environmental sciences Division, Las Vegas, Nevada |
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Contact Email
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Yuan.Yongping@epa.gov |
EM Description
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Summary Description
em.detail.summaryDescriptionHelp
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AUTHOR'S DESCRIPTION: " SWAT is a physically-based continuous watershed simulation model that operates on a daily time step. It is designed for long-term simulations. The U.S. Department of Agriculture-Agriculture Research Station (USDA-ARS) Grassland, Soil and Water Research Laboratory in Temple, Texas created SWAT in the early 1990s. It has undergone continual review and expansion of capabilities since it was created (Arnold et al., 1998; Neitsch, et al., 2011a and b). This model has the ability to predict changes in water, sediment, nutrient and pesticide loads with respect to the different management conditions in watershed. Major components of the SWAT model include hydrology, weather, erosion, soil temperature, crop growth, nutrients, pesticides and agricultural management practices (Neitsch et al., 2011b). SWAT subdivides a watershed into multiple sub-watersheds, and the subwatersheds are further divided into Hydrologic Response Units (HRUs) that consist of homogeneous land use, soils, slope, and management (Gassman et al., 2007; Neitsch, et al., 2011b; Williams et al., 2008). |
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Specific Policy or Decision Context Cited
em.detail.policyDecisionContextHelp
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None Identified |
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Biophysical Context
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Need to fill in |
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EM Scenario Drivers
em.detail.scenarioDriverHelp
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Planting type, fertilizing rate, harvest rate |
EM Relationship to Other EMs or Applications
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Method Only, Application of Method or Model Run
em.detail.methodOrAppHelp
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Method + Application |
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New or Pre-existing EM?
em.detail.newOrExistHelp
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New or revised 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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1981-2004 |
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EM Time Dependence
em.detail.timeDependencyHelp
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time-dependent |
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EM Time Reference (Future/Past)
em.detail.futurePastHelp
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future time |
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EM Time Continuity
em.detail.continueDiscreteHelp
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discrete |
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EM Temporal Grain Size Value
em.detail.tempGrainSizeHelp
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1 |
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EM Temporal Grain Size Unit
em.detail.tempGrainSizeUnitHelp
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Day |
EM Spatial Extent
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Bounding Type
em.detail.boundingTypeHelp
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Watershed/Catchment/HUC |
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Spatial Extent Name
em.detail.extentNameHelp
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Guanica Bay, Puerto Rico watersheds |
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Spatial Extent Area (Magnitude)
em.detail.extentAreaHelp
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100-1000 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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30m x 30m |
EM Structure and Computation Approach
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EM Computational Approach
em.detail.emComputationalApproachHelp
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Numeric |
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EM Determinism
em.detail.deterStochHelp
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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 ?Comment:Used 1981 and 1982 data to calibrate hydrology. |
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Model Goodness of Fit Reported?
em.detail.goodnessFitHelp
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No ?Comment:Calibration for both the stream flow and Sediment concentration of the mode |
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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 ?Comment:Validation with 1983-1984 data from USGS. Used streamflow and water quality data from two stations |
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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 ?Comment:Yes for both runoff and sediment |
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Model Sensitivity Analysis Include Interactions?
em.detail.interactionConsiderHelp
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No |
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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18.19 |
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Centroid Longitude
em.detail.ddLongHelp
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-66.76 |
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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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Terrestrial Environment (sub-classes not fully specified) |
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Specific Environment Type
em.detail.specificEnvTypeHelp
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watershed |
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EM Ecological Scale
em.detail.ecoScaleHelp
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Ecological scale is finer 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, Agricultural water use (million gallons/day), The Watershed Boundary Dataset (WBD) |
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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| None |
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 (9 variables)
em.detail.intermediateVariableHelp
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Response
em.detail.variablesResponseHelp
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Observed Response Variables (and Units)
em.detail.observedResponseHelp
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None |
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Computed Response Variables (and Units)
view details (6 variables)
em.detail.computedResponseHelp
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