EcoService Models Library (ESML)
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EM: VELMA (Visualizing Ecosystem Land Management Assessments) v. 2.1 contaminant modeling (EM-892)
EM Identity and Description
EM Identification
EM ID
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EM-892 |
EM Short Name
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VELMA v. 2.1 contaminant modeling |
EM Full Name
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VELMA (Visualizing Ecosystem Land Management Assessments) v. 2.1 contaminant modeling |
EM Source or Collection
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US EPA |
EM Source Document ID
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423 ?Comment:Document #430 is an additional source for this EM. Document #423 has been imcorporated into the more recently published document #430. |
Document Author
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McKane |
Document Year
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None |
Document Title
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Tutorial A.1 – Contaminant Fate and Transport Modeling Concepts; VELMA 2.1 “How To” Documentation |
Document Status
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Peer reviewed and published |
Comments on Status
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Published EPA report |
Software and Access
https://cfpub.epa.gov/ncea/risk/recordisplay.cfm?deid=354355 | |
Contact Name
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Robert B. McKane |
Contact Address
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US EPA, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Western Ecology Division, Corvallis, Oregon 97333 |
Contact Email
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mckane.bob@epa.gov |
EM Description
Summary Description
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ABSTRACT: "This document describes the conceptual framework underpinning the use of VELMA 2.1 to model fate and transport of organic contaminants within watersheds. We review how VELMA 2.1 simulates contaminant fate and transport within soils and hillslopes as a function of two processes: (1) the partitioning of the total amount of a contaminant between sorbed (immobile) and aqueous (mobile) phases; and (2) the vertical and lateral transport of the contaminant’s aqueous phase within surface and subsurface waters." |
Specific Policy or Decision Context Cited
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None identified |
Biophysical Context
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No additional description provided |
EM Scenario Drivers
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No scenarios presented |
EM Relationship to Other EMs or Applications
Method Only, Application of Method or Model Run
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Method Only |
New or Pre-existing EM?
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New or revised model |
Related EMs (for example, other versions or derivations of this EM) described in ESML
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Document ID for related EM
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Doc-430 |
EM ID for related EM
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EM-883 | EM-884 | EM-887 |
EM Modeling Approach
EM Relationship to Time
EM Temporal Extent
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Not applicable |
EM Time Dependence
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time-dependent |
EM Time Reference (Future/Past)
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Not applicable |
EM Time Continuity
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discrete |
EM Temporal Grain Size Value
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1 |
EM Temporal Grain Size Unit
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Day |
EM Spatial Extent
Bounding Type
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Not applicable |
Spatial Extent Name
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Not applicable |
Spatial Extent Area (Magnitude)
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Not applicable |
Spatial Distribution of Computations
EM Spatial Distribution
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spatially distributed (in at least some cases) |
Spatial Grain Type
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volume, for 3-D feature |
Spatial Grain Size
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user defined |
EM Structure and Computation Approach
EM Computational Approach
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Analytic |
EM Determinism
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deterministic |
Statistical Estimation of EM
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Model Checking Procedures Used
Model Calibration Reported?
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Not applicable |
Model Goodness of Fit Reported?
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Not applicable |
Goodness of Fit (metric| value | unit)
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None |
Model Operational Validation Reported?
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Not applicable |
Model Uncertainty Analysis Reported?
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Not applicable |
Model Sensitivity Analysis Reported?
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Not applicable |
Model Sensitivity Analysis Include Interactions?
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Not applicable |
EM Locations, Environments, Ecology
Location of EM Application
Terrestrial location (Classification hierarchy: Continent > Country > U.S. State [United States only])
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None |
Marine location (Classification hierarchy: Realm > Region > Province > Ecoregion)
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None |
Centroid Lat/Long (Decimal Degree)
Centroid Latitude
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Not applicable |
Centroid Longitude
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Not applicable |
Centroid Datum
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Not applicable |
Centroid Coordinates Status
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Not applicable |
Environments and Scales Modeled
EM Environmental Sub-Class
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Terrestrial Environment (sub-classes not fully specified) |
Specific Environment Type
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Terrestrial environment |
EM Ecological Scale
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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
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EM Organismal Scale
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Not applicable |
Taxonomic level and name of organisms or groups identified
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None Available |
EnviroAtlas URL
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None Available |
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)
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(Environmental Subclass > Ecological End-Product (EEP) > EEP Subclass > EEP Modifier)
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None |
EM Variable Names (and Units)
Predictor
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Intermediate
Intermediate (Computed) Variables (and Units)
view details (3 variables)
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Response
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Observed Response Variables (and Units)
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None |
Computed Response Variables (and Units)
view details (1 variable)
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