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United States Department of Agriculture

Agricultural Research Service

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AnnAGNPS Pollutant Loading Model

I. Green BulletImpoundments


The impoundment module uses a modified sediment deposition algorithm. It is modified to reflect the simplifications associated with small impoundments with restricted pressurized outflow and/or some permanent pool storage. These simplifications are: (1) constant transport discharge equal to a constant outflow; (2)  zero sediment transport capacity for all sediment sizes; and (3) dilution of the incoming water-sediment mixture by the permanent pool storage.


Fred D. Theurer or Vance Justice

Last Modified: 8/12/2016
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