WOOD, MARK ALAN.

An investigation was conducted to determine the relationship
between hydrodynamic boundary layer parameters and biofouling
growth rates. A summary of previous investigations of hydrodynamic
effects on biofouling is presented. Wall shear stress
is shown to be an important parameter and is described in
detail. A submersible water tunnel was designed to allow
investigation of a flat plate subject to a uniform flow of
seawater. Parallel flow past a flat plate with a laminar
boundary layer was used to ensure that experimental conditions
existed in which a known wall shear stress distribution was
establised. Tests were conducted off Virginia Key in Miami,
Florida. The results of the experiments clearly indicate the
existance of a threshold value of shear stress which inhibits
the attachment of the macrofouler under study, the acorn
barnacle (Balanus spp.). Reported growth rates from other
investigations are presented to substantiate results. Recommendations
are made for additional hydrodynamic investigations
in dealing with biofouling.