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ATMOSPHERIC BOUNDARY LAYER STABILITY ESTIMATOR FOR URBAN AREA

Award Information

Agency:
Department of Defense
Branch:
Army
Award ID:
15973
Program Year/Program:
1991 / SBIR
Agency Tracking Number:
15973
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Sigma Research Corp
234 Littleton Rd - Ste 2e Westford, MA 01886
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Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 1991
Title: ATMOSPHERIC BOUNDARY LAYER STABILITY ESTIMATOR FOR URBAN AREA
Agency / Branch: DOD / ARMY
Contract: N/A
Award Amount: $49,967.00
 

Abstract:

IN MOST U.S. ARMY ATMOSPHERIC DISPERSION MODELS, THE PASQUILL METHODOLOGY IS USED TO ESTIMATE STABILITY IN THE BOUNDARY LAYER. AS A RESULT, THERE ARE DISCONTINUITIES IN CALCULATED DISPERSION AMONG THE SIX STABILITY CLASSES. FURTHERMORE, CORRECTIONS FOR SURFACE CONDITIONS (I.E., FIELDS, URBAN AREAS, OR FORESTS) ARE ALSO DISCRETE FUNCTIONS. RECENT THEORETICAL DEVELOPMENTS PROVIDE THE BASIS FOR REVISING THIS METHODOLOGY USING PRINCIPLES OF MONIN-OBUKHOV AND CONVECTIVE SIMILARITY THEORY. AN ALGORITHM FOR DETERMINING STABILITY AS A CONTINUOUS FUNCTION IS DEVELOPED FOR USE ON A PERSONAL COMPUTER. THIS ALGORITHM REQUIRES INPUT OF BASIC OBSERVATIONS SUCH AS WIND SPEED, CLOUDINESS, SURFACE ROUGHNESS AND ALBEDO, AND MOISTURE CONTENT OF THE GROUND. THE METHODOLOGY IS SUFFICIENTLY GENERAL THAT IT IS VALID FOR ALL TYPES OF UNDERLYING SURFACES AND PRODUCES AN ESTIMATE OF STABILITY THAT IS CONTINUOUS IN TIME AND SPACE. PROFILES OF WIND, TEMPERATURE, AND TURBULENCE CAN ALSO BE READILY CALCULATED BY THIS ALGORITHM, FOR DIRECT USE IN DISPERSION MODELS.

Principal Investigator:

Steven R Hanna
Principal Investigator
5086920330

Business Contact:

Small Business Information at Submission:

Sigma Research Corp
234 Littleton Rd - Ste 2e Westford, MA 01886

EIN/Tax ID:
DUNS: N/A
Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No