The Spatial-Temporal Change of Extreme Precipitation in the Southwest Region of Zhejiang Province during 1953-2022 ()
ABSTRACT
Based on the daily precipitation from 17 meteorological stations in the
southwest of Zhejiang from 1953 to 2022, 11 extreme precipitation indices were calculated, and the
temporal-spatial characteristic of extreme precipitation were analyzed. The results indicate that 1) Except for
the number of consecutive dry days (CDD),
all the other extreme precipitation indices had low values in the northeast of the study area and high value
around Liuchun Lake; 2) CDD had a decreasing trend in most part of study
area, while the other indices were on the rise, especially at Suichang (SC)
and Tonglu (TL) stations, the change was significant (p < 0.05);
3) The annual variation showed that CDD declined with the trend of 0.83 d/10a,
however, all the other indices increased, especially after 2000, the increase
was more obvious. In general, the extreme precipitation mount, the
extreme precipitation days showed an increasing trend, drought was less likely
to happen, and the possibility of heavy precipitation is less, however, at some
individual station such as SC, heavy precipitation and storm is much more
likely to occur.
Share and Cite:
Yang, W. , Yuan, S. and Shi, H. (2023) The Spatial-Temporal Change of Extreme Precipitation in the Southwest Region of Zhejiang Province during 1953-2022.
Journal of Geoscience and Environment Protection,
11, 91-102. doi:
10.4236/gep.2023.1111007.
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