The Guelph Rainfall Simulator II: Part 2 - a comparison of natural and simulated rainfall characteristics.

Properties of simulated rainfall generated by the Guelph Rainfall Simulator II (GRS II) are compared with the properties of natural rainfall. Properties examinedinclude: drop size distribution, drop velocity, liquid water content, momentum and ki netic energy flux density. Comparison with the limited drop size distributiondata of high intensity natural storms show that the GRSII simulated rainfall has drop size distribution characteristics similar to natural rainfall through the mid to large drop size ranges (diameter> 1.50 mm). The simulated rainfall has greater counts of small drops (diameter< 2.00 mm), as compared to natural rainfall; and simulated drop velocities are generally lower than the terminal velocities of natural rainfall, resulting in lower values of momentum and kinetic energy than those of natural rainfall.

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