Identifying Characteristics of Guam’s Extreme Rainfalls Prior to Climate Change Assessment

Extreme rainfall and its consequential flooding account for a devastating amount of damage to the Pacific Islands. Having an improved understanding extreme patterns can better inform stormwater managers about current future scenarios, so they minimize potential damages disruptions. In this study, scaling invariant properties annual maximum precipitations (AMPs) are used describing regional rainfalls over Guam. AMPs calculated at seven stations in Guam exhibit distinct simple behavior two different time frames: (1) from 15 min 45 min; (2) 24 h. With these behaviors, conventional estimation methods sub-hourly durations overestimate frequencies site which breakpoints clearly observed, while proposed Scaling Generalized Value (GEV) method, based on Three-NCM (S3NCM) provides comparable estimates. A new analysis approach exponents is introduced study. Results show Moreover, numerical graphical analyses identify that tropical cyclone may increase daily by 3%, average.