Paper Conference

Proceedings of ASim Conference 2014: 2nd Asia conference of IBPSA-China, Japan, Korea


Numerical Simulation of Solar Shading Effect of Urban Trees Using Airborne Laser Scanning-Derived 3D Tree Structures

Haruki Oshio, Takashi Asawa, Akira Hoyano, Satoshi Miyasaka

Abstract: We demonstrate a method for estimating the solar shading effect of trees in an urban district. The leaf area density distribution, derived from airborne laser scanning data using a method proposed by our previous study, is applied to radiative transfer simulation of vegetation. First, estimation accuracy of direct solar transmittance of a tree is verified by comparing with the measured transmittance. We conclude that direct solar transmittance is accurately estimated, regardless of solar altitude. Subsequently, the method was applied to an urban district. We examine differences in the solar shading effect of tress depending on their layout, foliage density, and peripheral spatial geometry. Usefulness of the method is thereby confirmed.
Keywords: Tree, Solar shading, Leaf area density, Airborne laser scanning, Radiative transfer simulation
Pages: 259 - 266