Conducted on the environmental wind tunnel.The effects of the gas spill angle, the densimetric Froude number and the terrain parameter on the heavy gases diffusion are measured and investigated.

• 藉由实验量测重质气体之扩散浓度，以探讨当重质气体在各种溢漏角度、密度福禄数及地形条件下对于重质气体扩散之影响特性。