Optimized System for Extreme Precipitation Events Extraction Based on Improved Percentile Method

Abstract

In this paper, a system used for calculating the threshold values of extreme precipitation events and extracting these events is proposed. The threshold calculation algorithms are based on four improved percentile methods and the system selects an optimal method automatically during the calculation. In addition, the precipitation data of every year is divided into four parts according to the season. Therefore, precipitation threshold for each season is calculated and used for comparison. In experiments, the system is applied to the simulation data of precipitations from 2051 to 2111 and the variation trend of the precipitations is analyzed.