DOI: 10.5281/zenodo.7861989
Analysis of Temporal Evolution Characteristics of Precipitation in Beijing
Zhang Chengze1, Sun Jichao1*
1School
of Water Resources and Environment, China University of Geosciences
(Beijing), Beijing 100083, China
* Correspondent Author:
Sun Jichao, sunjc@cugb.edu.cn
Abstract: To master the law of
precipitation evolution in Beijing and better implement the management of
water resources. Based on the monthly precipitation data of Beijing from
1978 to 2020, the trend, mutation and periodicity of annual and seasonal
precipitation in Beijing were studied by using linear regression, anomaly
analysis, 5a moving average, Mann-Kendall mutation test and Morlet wavelet
analysis. The results show that the annual, spring, summer, autumn and
winter tilt rates are - 1.81mm/3a, - 0.17mm/3a, - 3.11 mm/3a, 1.42mm/3a and
0.02mm/3a respectively. The precipitation in summer decreased significantly
in 2005, in autumn increased significantly in 2012, and in winter decreased
significantly in 1982. There was no significant change in inter-annual and
spring precipitation. The annual and seasonal precipitation had many
mutations in this time series, and the mutations were 7 times, 13 times, 2
times, 5 times and 7 times respectively. There are three kinds of periodic
changes in annual precipitation, and the intensity of periodic changes is
the largest in the 20-32 year scale. There were 3 types, 2 types, 2 types
and 2 types of periodic changes in each season respectively. The intensity
of periodic changes in winter precipitation was the largest on a 10-20 year
scale, and the intensity of periodic changes in the other three seasons was
the largest on a 20-32 year scale. In general, the annual and seasonal
precipitation in Beijing has obvious trends, mutations and periodicity, and
the research results have certain reference values for Beijing water
resources planning and other related work.
Key words:
precipitation; Trend; Respectively; Periodically;
Morlet wavelet analysis; M-K mutation test
International Journal of Ground Sediment & Water
ISSN: 2372-0743 (print) ISSN: 2373-2989 (on line)
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