Abstract
In this study, numerical experiments using SCALE-RM on the cloud-seeding method for
heavy rain mitigation considering multiple implementation conditions were conducted. The
effects of heavy rain mitigation under various conditions such as seeding implementation time,
altitude, and area were evaluated, and comparisons were made with previous studies using WRF
regarding the heavy rain mitigation effects by cloud seeding. As a result, it was confirmed that
both the accumulated maximum and time maximum precipitation decreased due to seeding
implementation, and the mitigation effect at peak times was observed. Particularly, the largest
mitigation effect was obtained when two steps seeding, and an analysis of the mitigation
mechanism confirmed that the combination of two different mechanisms, the weakening of
updrafts and the suppression of graupel growth, enhanced the heavy rain mitigation effect. These
mitigation effects generally matched the results of previous studies using WRF, indicating a
reliability improvement of heavy rain mitigation effects through cloud seeding.
