ESTIMATING QUANTITY OF FLYING INSECTS ATTRACTED TO CONSTRUCTION LIGHT BASED ON LIGHT TRAP TEST

Abstract

 Conservation of the surrounding environment is strongly required when civil engineering works in a natural environment. In particular, when using construction light at night, it affects not only the construction area but also a wide area of the surroundings, so that it is prevended by reducing the exposure range and using a light source with low insect attraction. However, it is difficult to quantitatively evaluate the effects on ecosystems, and quantification of the effects by introducing measures was a problem. Therefore, the attraction amount for each insect species was measured by a light trap test using nine kinds of environmental categories and three light sources, and the prediction for quantitatively visualizing the attracting amount of flying insects by nighttime construction lighting was cullied out from the result. As a result, in a lighting plan using Hg, Na and LED lights at a construction site surrounded by deciduous and evergreen forest, it was estimated that 150.7 kg, 41.9 kg and 8.7 kg of flying insects would be attracted to night lighting, respectively, used for 213 days.