Open AccessRefined characteristics of rainfall in Guangxi area for mountain flood based on hourly precipitation
Author(s) -
Ning Zhou,
Xinxin Zhang,
Hongen Li,
Haifeng Xu,
Li Zheng,
Yongjun He
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/304/2/022082
Subject(s) - precipitation , flood myth , environmental science , empirical orthogonal functions , climatology , spatial distribution , morning , geography , meteorology , geology , medicine , remote sensing , archaeology
On the basis of hourly rainfall dataset from 92 meteorological stations for the 10 years (2008-2017), the spatial and temporal distribution of precipitation in Guangxi were analyzed. Results showed that high value precipitation centers were found over different districts during two time frame, 6:00-12:00 and 18:00-24:00. The rainfall over north of Guangxi mainly happened during 18:00-24:00, but over the middle of Guangxi was during 6:00-12:00. The hourly precipitation distributed unevenly on season scale. Seasonal differences in diurnal variation of rainfall were distinguished. Summer rainfall events concentrated at morning, but the events during other three seasons were more likely to happen in the evening. Using empirical orthogonal function (EOF), the first principal component displayed apparent spatial distribution, which would be helpful to classify the security of mountain flood. During the 6:00-12:00, the patterns were more typical to describe the high rainfall centers in summer. As for the other three seasons, the patterns were appropriate during 18:00-24:00.