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SWAT-BR Abstract

SWAT-BR add-on for SWAT2005:
Release of bacteria from stream bottom sediments

Streambed sediment has been attracting attention as a reservoir for bacteria, including pathogenic strains. Soil and Water Assessment Tool (SWAT2005) includes bacteria transport subroutine in which bacteria die-off is the only in-stream process. The purpose of this technical bulletin was to describe SWAT bacteria routing module by including sediment-associated bacteria release and settling in streams. Streambed bacteria release and settling were computed based on the sediment resuspension and deposition modules in SWAT. The model and the necessary modifications of the SWAT 2005 code are presented.

 
A flume to measure stream flow and to sample water at the Beaver Dam Tributary Creek at the Beltsville OPE3 site. Photo by A.K. Guber.
A flume to measure stream flow and to sample water at the Beaver Dam Tributary creek at the Beltsville OPE3 site.
Photo by A.K. Guber.