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AGNPS Continuous Simulation Model Processes

ARS, National Sedimentation Laboratory, Watershed Physical Processes Research Unit



AGNPS Modeling Components
Input Data Preparation
AnnAGNPS Pollutant Loading Model
Output Processing

Related Links
Water Quality Models
AGNPS References


The AnnAGNPS Pollutant Loading Model predicts (1) water; (2) sediment by particle size class & source of erosion; and (3) chemicals-nitrogen, phosphorus, organic carbon, & pesticides. These "loadings" are generated from land areas (called AGNPS cells) and routed through stream systems on a daily basis. Special land use components such as feedlots, gullies, field ponds, and point sources are included. Details about the specific processes modeled are given below:

Contact: Ron Bingner or Fred Theurer.

  Chemical Routines - in situ   Ephemeral Gullies   Sediment Reach Routing
  Chemical Reach Routing   Hydrograph Development   Composite of Soil Layers
  Erosion Routine - RUSLE2   Impoundments   Soil Moisture,  CN Runoff
  Error Checking   Internal Data Preparation   Source Accounting
  Event Output Files   Irrigation   Water Reach Routing
  Feedlots   Overall System   Winter Routines
  Field Ponds   Read Input