WWRC 93-17
ANN-AGNPS: A Continuous Simulation Watershed Model
Abstract
The Annualized Agricultural Nonpoint Source (ANN-AGNPS) model is a distributed
parameter, continuous simulation model developed to simulate the behavior of
watershed or catchments that have agriculture as their primary land use. It is
based on the present AGNPS single event model and uses enhanced RUSLE routines.
The basic components of the model include hydrology, sedimentation, and chemical
transport. The model is cellular based with all characteristic inputs and
calculations made at the cell level. Primary capabilities of the model include
evaluation of the relative quantity and quality of outflow from a watershed in
order to assess their pollution potential, identification of critical areas of
nonpoint source pollutant production within a watershed, and evaluation of the
effects on watershed outflow by applying alternative management practices on
problem areas. A preliminary evaluation of the model on a monitored watershed
is presented.
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