Accession Number : ADA332896

Title :   Surface Effects on Evaporation, Recirculation, and Dispersion in Light Winds.

Descriptive Note : Final rept. Jul 95-Aug 97,

Corporate Author : ARMY DUGWAY PROVING GROUND UT

Personal Author(s) : Biltoft, Christopher A.

PDF Url : ADA332896

Report Date : SEP 1997

Pagination or Media Count : 115

Abstract : A joint U.S., UK, and Canadian Evaporation, Recirculation, and Dispersion in Light winds trials program was conducted at U.S. Army Dugway Proving Ground in July-August 1995. Program objectives were to: (1) obtain evaporation data from chemical agent simulants on sand, concrete, and aluminum surfaces; (2) document the effects of obstacle geometry and atmospheric stability on the accumulation and retention of material entrained into obstacle wakes; and (3) examine near-surface dispersion in low winds. The program produced data sets that can be used to validate evaporation and urban dispersion models, and provided detailed descriptions of dispersion in low winds. Based on an analysis of the data. new turbulence and stability indices are proposed to characterize surface layer dispersion.

Descriptors :   *EVAPORATION, *CHEMICAL AGENT SIMULANTS, DISPERSING, BOUNDARY LAYER, DIFFUSION, HOT WIRE ANEMOMETERS, ATMOSPHERIC PHYSICS.

Subject Categories : Meteorology
      Chemical, Biological and Radiological Warfare

Distribution Statement : APPROVED FOR PUBLIC RELEASE