Acid rain model: canopy module
A canopy model has been developed to calculate throughfall characteristics based on canopy properties, ambient air quality, and precipitation quantity and quality. The processes considered include wet and dry deposition, leaf exudation, nitrification, and oxidation of SO/sub 2/ and NO/sub x/. The canopy model requires only standard input data that can be obtained by use of rain gages, thermometers, dry and wet collectors. The model has been calibrated with data collected at Woods Lake in the Adirondack Mountains of New York. The model has accurately simulated throughfall volume and the concentration of 15 throughfall chemical constituents. The dominant process occurring in the coniferous canopy is dry deposition. Calculations suggest that dry deposition measured by bulk collectors grossly underestimates the total amount of dry deposition to the forested watershed. The enrichment of acidity in coniferous throughfall is derived primarily from the accumulation of acidic air particulates. The dominant process occurring in the deciduous canopy is exudation. This partially neutralizes the acidic deposition. 31 references, 4 figures, 7 tables.
- Research Organization:
- Tetra Tech, Inc., Lafayette, CA
- OSTI ID:
- 5944678
- Journal Information:
- J. Environ. Eng. (N.Y.); (United States), Journal Name: J. Environ. Eng. (N.Y.); (United States) Vol. 109:3; ISSN JOEED
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
520200 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
ACID RAIN
ACIDIFICATION
ADIRONDACK MOUNTAINS
AIR QUALITY
AMMONIUM COMPOUNDS
APPALACHIAN MOUNTAINS
ATMOSPHERIC PRECIPITATIONS
CANOPIES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COMPUTERIZED SIMULATION
DEPOSITION
ENVIRONMENTAL QUALITY
LAKES
MATHEMATICAL MODELS
MOUNTAINS
NITRIFICATION
PARTICLES
PARTICULATES
PERFORMANCE TESTING
PRECIPITATION SCAVENGING
RAIN
SEPARATION PROCESSES
SIMULATION
SURFACE WATERS
TESTING
THROUGHFALL
WASHOUT
WATERSHEDS