The Global Importance of Increasing Design Rainstorms under Specific return Periods in China

Evaluating the correlation between changes in design rainstorms and extreme rainstorm events under climate change facilitates flood control disaster reduction. Based on daily rainfall data of 609 stations during 1958–2017, Pearson-III curve, least square method, F-test, other methods were adopted to study response over nearly 60 years China, explore capacity engineering change. The conclusions are as follows. (1) There is a general increasing trend China. Most indices present upward trends East China (EC), South (SC), Central (CC), Northwest (NW), Southwest (SW) downward Northeast (NE) North (NC). (2) temporal series shows growth each return period In EC, SC, SW, increase significantly with rates 3.0, 3.1, 1.3 mm/10a, respectively, 20-year period, while they decrease by −2.0 mm/10a NC (p < 0.05). (3) Design have positive events, which resulted specific NW, SW. These results can promote revision standards improve capability engineering.