TITLE:
Study on Design Rainstorm Profile in Liuzhou City Based on Pilgrim & Cordery Method
AUTHORS:
Xiaoling Su, Dong Xie, Lei Liu, Chunrong Liang, Zhourong Liu, Yu Li, Qiu Lan, Le Ren
KEYWORDS:
Liuzhou City, Pilgrim & Cordery Method, Short-Time Rainstorm, Design Rainstorm Profile
JOURNAL NAME:
Journal of Geoscience and Environment Protection,
Vol.7 No.3,
March
28,
2019
ABSTRACT: Liuzhou City is located in Guangxi Zhuang Autonomous Region of China. It
has a warm and rainy climate and belongs to the middle subtropical monsoon
climate. It is a rainstorm and flood-prone area. The work of flood drainage
and waterlogging prevention is very important. The “minute to minute”
rainfall process data of Liuzhou National Meteorological Observation Station
from 1975 to 2014 and the Pilgrim & Cordery method were used to estimate
the short-time design rainstorm profile of Liuzhou City, and the profiles of
the rainfall lasting for 30, 60, 90, 120, 150, and 180 min were obtained. The
research shows that the same rain duration and different recurrence period
conditions are consistent with the rainstorm profile. The rainfall duration of
30, 60, 90, 120, and 180 min generally shows single-peak rainstorm profile,
and the rainfall duration of 150 min shows double-peak rainstorm profile.
Most peaks of each short-time design rainstorm profile are at or ahead of
the 1/3 part of the entire rainfall process. During the same recurrence period,
the rainfall in peak period fluctuated with the increase of the duration,
and the intensity of rainfall increased with the prolonging of the recurrence
period.