MESOI Version 2. 0: an interactive mesoscale Lagrangian puff dispersion model with deposition and decay

Technical Report · Tue Nov 01 00:00:00 EST 1983

DOI:https://doi.org/10.2172/5591130· OSTI ID:5591130

Ramsdell, J V; Athey, G F; Glantz, C S

MESOI Version 2.0 is an interactive Lagrangian puff model for estimating the transport, diffusion, deposition and decay of effluents released to the atmosphere. The model is capable of treating simultaneous releases from as many as four release points, which may be elevated or at ground-level. The puffs are advected by a horizontal wind field that is defined in three dimensions. The wind field may be adjusted for expected topographic effects. The concentration distribution within the puffs is initially assumed to be Gaussian in the horizontal and vertical. However, the vertical concentration distribution is modified by assuming reflection at the ground and the top of the atmospheric mixing layer. Material is deposited on the surface using a source depletion, dry deposition model and a washout coefficient model. The model also treats the decay of a primary effluent species and the ingrowth and decay of a single daughter species using a first order decay process. This report is divided into two parts. The first part discusses the theoretical and mathematical bases upon which MESOI Version 2.0 is based. The second part contains the MESOI computer code. The programs were written in the ANSI standard FORTRAN 77 and were developed on a VAX 11/780 computer. 43 references, 14 figures, 13 tables.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• DOE Contract Number: AC06-76RL01830
• OSTI ID: 5591130
• Report Number(s): NUREG/CR-3344; PNL-4753; ON: DE84004562
• Resource Relation: Other Information: Portions are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
COMPUTER CODES
M CODES
GASEOUS WASTES
DIFFUSION
ADVECTION
DEPOSITION
RADIOACTIVE EFFLUENTS
WASHOUT
MASS TRANSFER
MATERIALS
PRECIPITATION SCAVENGING
RADIOACTIVE MATERIALS
RADIOACTIVE WASTES
SEPARATION PROCESSES
WASTES
500300* - Environment
Atmospheric- Radioactive Materials Monitoring & Transport- (-1989)