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[1]WU Yao,XIAO Tiangui,ZHAO Ping,et al.Temporal and Spatial Distribution of Midsummer Precipitation in Chengdu from 2008 to 2020[J].Research of Soil and Water Conservation,2022,29(05):343-349.

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Temporal and Spatial Distribution of Midsummer Precipitation in Chengdu from 2008 to 2020

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 05 Page number: 343-349 Column: Public date: 2022-08-20

Title:: Temporal and Spatial Distribution of Midsummer Precipitation in Chengdu from 2008 to 2020

Author(s):: WU Yao^1,2, XIAO Tiangui^1,2, ZHAO Ping², LI Yong³; (1.Chengdu University of Information Technology, Chengdu 610225, China; 2.State Key Laboratory of Hazardous Weather, Chinese Academy of Meteorological Sciences, Beijing 100081, China; 3.National Meteorological Center, Beijing 100081, China)

Keywords:: precipitation in Chengdu; spatiotemporal distribution; short time heavy precipitation

CLC:: P466

DOI:: -

Abstract:: In order to analyze the spatial and temporal distribution characteristics of summer precipitation in Chengdu, based on hourly precipitation data from 2008 to 2020, the spatial and temporal distribution characteristics of precipitation of July and August in mid-summer in Chengdu were analyzed. The results show that:(1)the average summer precipitation in Chengdu presented a general trend of high in the west and low in the east;(2)in mid-summer of Chengdu, the precipitation mainly occurred at night, and the rain belt obviously transferred to the east; the precipitation peak mainly occurred from March to April, and there was a secondary peak in the afternoon in the central and eastern parts;(3)the contribution rates of precipitation and precipitation frequency of hourly heavy precipitation were consistent in spatial distribution base, the maximum values were observed in the junction of Dayi and Qionglai, and the low values were found in the high-altitude area of western China and Jianyang area;(4)the numbers of hourly heavy precipitation in 2013, 2018 and 2020 were significantly more than those in 2013, 2018 and 2020, which was caused by the abnormal west-north subtropical high;(5)the frequency of hourly heavy precipitation in western Chengdu was significantly higher than that in other areas, but the extreme value was smaller; the extreme heavy precipitation events in Chengdu were more likely to occur around 3:00. In summary, through the study of Chengdu summer precipitation, it provides decision-making basis for precipitation monitoring, urban flood control and disaster prevention and mitigation.

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Last Update: 2022-08-20