National Water-Quality Assessment (NAWQA) Program
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Modeling and Software
Hydrologic modeling and analysis tools are important components of NAWQA studies. The types of modeling and analysis tools that play a large role in NAWQA include:
- Statistical models and analyses
- Geographic information system (GIS) analyses
- Process-based models
- Hybrid statistical, GIS, and process-based models
Some specific applications of hydrologic systems analysis tools:
-
SPARROW Modeled Estimates of Nutrient Fluxes Across the U.S. |
The use of a hybrid statistical, GIS, and process-based model (SPARROW) to estimate nutrient fluxes in unmonitored streams throughout the conterminous United States.
- The use of a hybrid statistical / GIS model (WARP) to estimate pesticide concentrations for unmonitored streams throughout the conterminous United States.
- The use of a process-based model (MODFLOW) to help understand sources of contaminants to public-supply wells.
- The use of statistical and GIS tools for classifying watersheds into Hydrologic Landscape Regions.
Spatial datasets developed for hydrologic systems analysis
Estimating contaminants in unmonitored streams and ground water
Modeling tools for understanding hydrologic processes
- Factors Influencing Ground-Water Recharge in the Eastern United States
- Precipitation-runoff modeling to compare hydrologic processes governing solute transport in an agricultural watershed in Maryland
- The water, energy, and biogeochemical model (WEBMOD): A TOPMODEL application developed within the Modular Modeling System
U.S. Department of the Interior | U.S. Geological Survey
