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EM: Nutrient Tracking Tool (NTT) (EM-549)
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EM Identity and Description
EM Identification
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EM ID
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EM-549 |
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EM Short Name
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Nutrient Tracking Tool (NTT) |
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EM Full Name
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Nutrient Tracking Tool (NTT) |
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EM Source or Collection
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None |
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EM Source Document ID
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352 |
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Document Author
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Saleh, A. and O. Gallego |
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Document Year
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2018 |
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Document Title
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Nutrient Tracking Tool (NTT) User Manual |
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Document Status
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Peer reviewed and published |
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Comments on Status
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webpage |
Software and Access
| http://ntt.tiaer.tarleton.edu/welcomes/new?locale=en | |
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Contact Name
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Ali Saleh ?Comment:Phone # 254-968-9079 |
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Contact Address
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Associate Director, Texas Institute for Applied Environmental Research, P.O. Box T410, Tarleton State University Stephenville, TX 76402 |
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Contact Email
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saleh@tarleton.edu |
EM Description
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Summary Description
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AUTHOR'S DESCRIPTION: "The Nutrient Tracking Tool (NTT) was designed and developed by the Texas Institute for Applied Environmental Research (TIAER), Tarleton State University with funding from USDA Office of Environmental Markets, USDA-NRCS Conservation Innovation Grants program, and various state agencies. NTT is a web-based, site-specific application that estimates nutrient and sediment losses at the field scale or at the small watershed scale. Agricultural producers and land managers can define a number of management scenarios and generate a report showing the expected nutrient loss differences between any selected scenarios for a given field or small watershed. NTT compares agricultural management systems to calculate a change in expected flow, nitrogen, phosphorus, sediment losses, and crop yield. Estimates are made using the APEX model (Williams et al. 2000). Results represent average losses from the field based on 35 years of simulated weather. NTT requires regional soils, climate and site-specific crop management information. NTT currently provides selections for all regions of U.S. and Puerto Rico territory, but it has only been validated for a limited number of states and counties. As validation becomes possible in other parts of the country, parameter files may be updated for additional counties in future versions. There are two versions of new NTT program available: The BASIC version is a user-friendly version of NTT that allows users to estimate N, P and sediment from crop and pasture lands. The Research and Education version of NTT (NTT-RE) was developed for researchers and educational institutes for teaching and training purposes. NTT-RE includes additional functions allowing the user to view and edit soil layers, view crop water and nutrient stresses, and modify and the APEX parameters file for calibration and validation purposes. The data sources and APEX simulations in both versions are identical. For more information regarding NTT, please refer to Saleh et al. (2011 and 2015)." |
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Specific Policy or Decision Context Cited
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None identified |
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Biophysical Context
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No additional description provided |
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EM Scenario Drivers
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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 Only |
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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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None |
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EM ID for related EM
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EM-584 |
EM Modeling Approach
EM Relationship to Time
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EM Temporal Extent
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35 yr |
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EM Time Dependence
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time-dependent |
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EM Time Reference (Future/Past)
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Not applicable |
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EM Time Continuity
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discrete |
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EM Temporal Grain Size Value
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1 |
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EM Temporal Grain Size Unit
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Day |
EM Spatial Extent
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Bounding Type
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Not applicable |
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Spatial Extent Name
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Not applicable |
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Spatial Extent Area (Magnitude)
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Not applicable |
Spatial Distribution of Computations
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EM Spatial Distribution
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spatially lumped (in all cases) |
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Spatial Grain Type
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Not applicable |
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Spatial Grain Size
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Not applicable |
EM Structure and Computation Approach
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EM Computational Approach
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Numeric |
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EM Determinism
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deterministic |
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Statistical Estimation of EM
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Model Checking Procedures Used
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Model Calibration Reported?
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Not applicable |
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Model Goodness of Fit Reported?
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Not applicable |
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Goodness of Fit (metric| value | unit)
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None |
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Model Operational Validation Reported?
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Unclear |
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Model Uncertainty Analysis Reported?
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Not applicable |
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Model Sensitivity Analysis Reported?
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Not applicable |
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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])
em.detail.relationToSpaceTerrestrialHelp
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| None |
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
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Not applicable |
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Centroid Longitude
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Not applicable |
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Centroid Datum
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Not applicable |
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Centroid Coordinates Status
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Not applicable |
Environments and Scales Modeled
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EM Environmental Sub-Class
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Agroecosystems |
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Specific Environment Type
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Agroecosystems |
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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
taxonomyHelp
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| None Available |
EnviroAtlas URL
em.detail.enviroAtlasURLHelp
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| GAP Ecological Systems, Agricultural water use (million gallons/day), Water supply from NID reservoirs (million gallons) |
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)
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EM Variable Names (and Units)
Predictor
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Intermediate
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Intermediate (Computed) Variables (and Units)
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None |
Response
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