SurfEst is intended to be a user-friendly, screening model for calculation preliminary EEC's in support of the pesticide registration and reregistration process for use in ecological risk assessments.
Spray Drift: ?
Runoff: SCS Curve Number method
Eroded Sediment: MUSLE
Pesticide Extraction from Soil: CREAMS method
Pond: analytical equation similar to stirred flow reactor
Stream: analytical equation for non-point source addition to plug-flow reactor
Output Parameters: Loadings to aquatic environments; pond and stream EEC's.
Spray drift, transport of pesticide dissolved in runoff and adsorbed to eroded sediment; degradation in soil and water; transport and degradation in ponds and streams
Strengths of Model: Simple, fast, easy to use, directed to a specific purpose.
Weaknesses of Model: Adequate for screening purposes; inadequate for other uses. Not validated.
Current Version No.: X1.0 (1992)
source of abstract: ACPA Modeldatabase (04/1998)
Output is to the screen and consists of four values, spray drift loading, loading from the field runoff, pond EEC, and flowing water EEC. Pesticide and scenario input parameters can be saved to separate files.
Graphic Capability: None