9:00 AM - 9:15 AM
[SVC48-01] Estimation of the airborne ash density for Sakurajima using PUFF model
Keywords:Volcanic ash prediction, Emission rate of volcanic ash, Aviation safety, Sakurajima Volcano, PUFF model, SATREPS
In this study, we conducted numerical simulations of volcanic ash dispersal from Sakurajima volcano using the real-time volcanic ash dispersion transport model PUFF for one year period in 1985 when volcanic activity was considerably high. According to the numerical simulation by the Lagrangian formulae of PUFF model for one year given the observed emission rate and plume height, the total particle number of the ash fallout was 1,962,976. On the other hand, the total amount of the observed ash fallout for one year period was 28,870,000 ton. The comparison shows an important measure of the particle mass, which is estimated as 14.7 ton/particle in the PUFF model. Based on this mass measure, we are now able to estimate the airborne ash density as a function of 3D space and time. The developed new system at Sakurajima volcano will now be applied to other volcanoes in Indonesia under the SATREPS project by JST and JICA.