Archimed software demonstration

Archimed is a simulation software being currently wrapped within the Alea computer platform. The Archimed purpose is first to simulate radiative transfers within 3D virtual stands composed of "architectural" plant mock-ups or geometrical crown shapes. Two models are implemented, using respectively the ray-tracing and the Z-buffer methods. The ray-tracing model simulates the radiative budget of a canopy taking into account the soil directional reflectance. This model is used for simulating the canopy BRDF. The Z-buffer model outputs the irradiation of leaves and soil. These outputs can then be processed for solving energy budgets of soil-patches and leaves according to physical environmental data and an ecophysiological stomatal conductance model. Outputs are the soil-patches and leaves temperature as well as their evapotranspiration. The directional aerodynamic canopy temperature is deduced from the soil and vegetation temperature and their respective area in a virtual sensor field of view. Another integrated module allows the calculation of the photosynthesis according to the Farquhar's model coupled with the Ball-Berry stomatal model. Successive steps of simulations will be presented, including: - The plant simulation (architectural coconut mock-ups using the "lubi" program or geometrical crown shapes using the "topiary" model); - The simulation of virtual stands; - The processing of light, temperature, evapotranspiration and photosynthesis simulations on these virtual stands.

Bibliographic Details

Main Author:	Dauzat, Jean
Format:	conference_item biblioteca
Language:	eng
Published:	CIRAD-AMAP
Subjects:	U10 - Informatique, mathématiques et statistiques, F50 - Anatomie et morphologie des plantes, F62 - Physiologie végétale - Croissance et développement, F61 - Physiologie végétale - Nutrition, P40 - Météorologie et climatologie,
Online Access:	http://agritrop.cirad.fr/523628/
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