Simulated transient thermal infrared emissions of forest canopies during rainfall events

Jerrell R. Ballard Jr.; William R. Hawkins; Stacy E. Howington; Raju V. Kala

doi:10.1117/12.2261874

2 May 2017 Simulated transient thermal infrared emissions of forest canopies during rainfall events

Jerrell R. Ballard Jr., William R. Hawkins, Stacy E. Howington, Raju V. Kala

Proceedings Volume 10206, Disruptive Technologies in Sensors and Sensor Systems; 102060U (2017) https://doi.org/10.1117/12.2261874
Event: SPIE Defense + Security, 2017, Anaheim, CA, United States

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.

Citation Download Citation

Jerrell R. Ballard Jr., William R. Hawkins, Stacy E. Howington, and Raju V. Kala "Simulated transient thermal infrared emissions of forest canopies during rainfall events", Proc. SPIE 10206, Disruptive Technologies in Sensors and Sensor Systems, 102060U (2 May 2017); https://doi.org/10.1117/12.2261874

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