Erythema Ultraviolet Radiation Characteristics under Coastal Trees

Abstract

ABSTRACT: There are a lot of planted trees in the coastal zone. The trees in the coastal zone were planted for storm, high tide and sand motion. The trees are also used as sunshade by swimmers at summer season. However, the protection characteristics for the erythema action ultraviolet radiation of the tree did not clear. This research was aimed to know that how decrease erythema action ultraviolet radiation by the trees. We carried out the measurements of spectral radiance distribution under the trees standing single and group. The radiances of sky element at attitude and direction were measured. From measurement results, the radiances of each sky element were cleared. The erythema action ultraviolet radiance can calculate using the results. After that, tree model with the erythema action ultraviolet radiation is proposed.