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NLET - National Load Estimating Tool

NLET (National Load Estimating Tool), a component of the USDA/ARS Soil and Water Hub, is a web-based tool for estimating pollutant loads in watersheds across the contiguous United States. This tool helps visualize the effects of land use patterns, cultivated crops, and conservation practices through graphical representation. Visualizations illustrate baseline and scenario land-use, crops, conservation, runoff, sediment, nitrogen, and phosphorus, and load differences at 50th percentile.

NLET implements an export coefficient approach for predicting the pollutant loads. NLET also addresses the need for a user-friendly, reliable and cost-effective watershed modeling tool.

NLET utilizes the D3.js library for creating an open-source JavaScript and data-driven charts, as well as Mapbox and OpenStreetMap for the Leaflet library, another open-source JavaScript library used for displaying the locations of Hydrologic Unit Catalog (HUC).

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FieldValue
Tags
NLET
National Load Estimating Tool
NP211
NP212
NP215
Modified
2019-08-05
Release Date
2018-04-18
Identifier
faeca3af-b1e6-4ac2-b710-afee24cf0f76
Spatial / Geographical Coverage Area
POLYGON ((-95.393066704273 49.390718622262, -122.99072295427 49.046272144223, -124.39697295427 47.880743391454, -124.74853545427 42.562524148417, -122.81494170427 37.589572543393, -119.12353545427 33.29533705186, -116.31103545427 32.260816853318, -114.55322295427 32.705654921671, -110.68603545427 31.214370510697, -108.40087920427 31.214370510697, -107.52197295427 31.813788042556, -106.64306670427 31.813788042556, -103.12744170427 29.086579846985, -102.07275420427 29.699190146047, -100.13916045427 28.624713962673, -97.678222954273 25.494524269057, -96.623535454273 28.160807105531, -94.689941704273 29.086579846985, -91.701660454273 29.546383858427, -90.119629204273 28.93285262998, -89.240722954273 30.004105722576, -86.604004204273 30.156213563649, -84.143066704273 29.851764343352, -82.385254204273 28.470304068247, -81.154785454273 25.653084153224, -80.275879204273 25.653084153224, -79.748535454273 26.757059094238, -81.330566704273 30.45972578952, -80.803222954273 31.664294451237, -75.529785454273 35.184287601126, -74.123535454273 39.784622524538, -72.717285454273 40.989576410551, -70.256347954273 41.780872961995, -70.256347954273 43.716860745734, -67.268066704273 44.599596818623, -67.443847954273 47.048918724375, -69.025879204273 47.525858859652, -70.080566704273 46.203916132075, -71.311035454273 45.59226206518, -74.475097954273 45.098086535875, -76.232910454273 44.22289853526, -78.869629204273 43.843774374786, -79.221191704273 42.691859658448, -82.736816704273 41.518177644287, -82.209472954273 43.334503843965, -83.615722954273 46.082124300382, -84.670410454273 46.92901151486, -89.768066704273 47.880743391454))
Publisher
USDA Agricultural Research Service
Spatial / Geographical Coverage Location
Contiguous United States
License
U.S. Public Domain
Contact Name
White, Mike
Contact Email
mike.white@ars.usda.gov
Public Access Level
Public
Program Code
005:040 - Department of Agriculture - National Research
Bureau Code
005:18 - Agricultural Research Service
Extended Metadata: 
FieldValue
Authors
USDA ARS Grassland Soil and Water Research Laboratory
Peer Reviewed
No
Funding Sources
Agricultural Research Service
Product Type
Software
Related Content
Soil and Water Hub
SNAP - Soil Nutrient Assessment Program
SWIFT - Small Watershed Nutrient Forecasting Tool
FieldValue
ISO Topic(s)
biota
environment
geoscientificInformation
inlandWaters
State or Territory
United States Of America
National Agricultural Library Thesaurus Term
agricultural policy
sediments
nutrients
pesticides
landscapes
watersheds
groundwater
soil
land use
soil quality
conservation practices
cropping systems
runoff
pollutants
models
soil erosion models
simulation models
water reservoirs
water quality
Internet
pollution load
United States
crops
nitrogen
phosphorus
prediction
cost effectiveness
hydrologic models
computer software
Ag Data Commons Keywords
  • Agroecosystems & Environment
  • Soil
  • Nutrients
  • Agroecosystems & Environment
  • Water
  • Hydrology
  • Agroecosystems & Environment
  • Weather and Climate
  • Agroecosystems & Environment
  • Management
  • Plants & Crops
  • Crop production
  • Nutrient Management
  • Agroecosystems & Environment
  • Water
  • Water quality
  • Plants & Crops
  • Crop production
  • Agroecosystems & Environment
  • Soil
  • Agroecosystems & Environment
  • Water
  • Agroecosystems & Environment
  • Plants & Crops

Suggested Citation:

(dataset) USDA ARS Grassland Soil and Water Research Laboratory (2018). NLET - National Load Estimating Tool . USDA Agricultural Research Service. https://data.nal.usda.gov/dataset/nlet-national-load-estimating-tool. Accessed 2023-09-23.