抄録
Chemical tankers in Japan transport various kinds and large amount of chemical substance. Some of them have adverse effects to the human health condition. However they are VOC (Volatile Organic Compound) and vapor gas emits into the atmospheric environment easily. Considering this background, we developed a calculation model to estimate vapor gas concentration distribution evaporated from spilled chemical substances on the sea. The calculation model is composed of four elements, wind profile estimation model, dispersion model for the spilled liquid on the sea, evaporation rate estimation including a spilled liquid spreading model and atmospheric dispersion model. The calculation result agreed with observed concentration obtained from an oil spill accident in Tokyo bay.
