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Proceedings Paper

Simulated transient thermal infrared emissions of forest canopies during rainfall events
Author(s): Jerrell R. Ballard Jr.; William R. Hawkins; Stacy E. Howington; Raju V. Kala
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Paper Abstract

We describe the development of a centimeter-scale resolution simulation framework for a theoretical tree canopy that includes rainfall deposition, evaporation, and thermal infrared emittance. Rainfall is simulated as discrete raindrops with specified rate. The individual droplets will either fall through the canopy and intersect the ground; adhere to a leaf; bounce or shatter on impact with a leaf resulting in smaller droplets that are propagated through the canopy. Surface physical temperatures are individually determined by surface water evaporation, spatially varying within canopy wind velocities, solar radiation, and water vapor pressure. Results are validated by theoretical canopy gap and gross rainfall interception models.

Paper Details

Date Published: 2 May 2017
PDF: 10 pages
Proc. SPIE 10206, Disruptive Technologies in Sensors and Sensor Systems, 102060U (2 May 2017); doi: 10.1117/12.2261874
Show Author Affiliations
Jerrell R. Ballard Jr., U.S. Army Engineer Research and Development Ctr. (United States)
William R. Hawkins, U.S. Army Engineer Research and Development Ctr. (United States)
Stacy E. Howington, U.S. Army Engineer Research and Development Ctr. (United States)
Raju V. Kala, U.S. Army Engineer Research and Development Ctr. (United States)


Published in SPIE Proceedings Vol. 10206:
Disruptive Technologies in Sensors and Sensor Systems
Russell D. Hall; Misty Blowers; Jonathan Williams, Editor(s)

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