Resuspension of toxic aerosol using MATHEW--ADPIC wind field--transport and diffusion codes

Technical Report · Fri Jun 01 04:00:00 EDT 1979

DOI:https://doi.org/10.2172/6224470· OSTI ID:6224470

Porch, W M

Computer codes have been written which estimate toxic aerosol resuspension based on computed deposition from a primary source, wind, and surface characteristics. The primary deposition pattern and the transport, diffusion, and redeposition of the resuspended toxic aerosol are calculated using a mass-consistent wind field model including topography (MATHEW) and a particle-in-cell diffusion and transport model (ADPIC) which were developed at LLL. The source term for resuspended toxic aerosol is determined by multiplying the total aerosol flux as a function of wind speed by the area of highest concentration and the fraction of suspended material estimated to be toxic. Preliminary calculations based on a test problem at the Nevada Test Site determined an hourly averaged maximum resuspension factor of 10/sup -4/ for a 15 m/sec wind which is within an admittedly large range of resuspension factor measurements using experimental data.

• Research Organization: California Univ., Livermore (USA). Lawrence Livermore Lab.
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6224470
• Report Number(s): UCID-18204
• Country of Publication: United States
• Language: English

Related Subjects

500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
500300 -- Environment
Atmospheric-- Radioactive Materials Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
A CODES
AEROSOLS
AIR
COLLOIDS
COMPUTER CODES
DATA
DATA FORMS
DEPOSITION
DIFFUSION
DISPERSIONS
ENVIRONMENTAL TRANSPORT
EXPERIMENTAL DATA
FLUIDS
GASES
GRAPHS
INFORMATION
M CODES
MASS TRANSFER
MATHEMATICAL MODELS
NUMERICAL DATA
PARTICLE RESUSPENSION
PARTICLES
RADIOACTIVE AEROSOLS
SOLS
SURFACE AIR
TOXIC MATERIALS
WIND