Analysis of concentration degree and concentration period of short-time heavy precipitation and difference analysis based on Morlet wavelet analysis

DOI

10.2991/assehr.k.220109.088How to use a DOI?

Keywords

Morlet wavelet analysis; short-time heavy precipitation; Precipitation concentration; Precipitation concentration period

Abstract

As the extreme weather led by short-time heavy precipitation has brought more and more obvious impact on urban social stability and residents’ life in recent years, studying the occurrence and development of short-time heavy precipitation has become an indispensable puzzle to fill the blank of urban planning decision-making. Based on the analysis of the correlation between short-term heavy precipitation and annual precipitation in the Nantong area, this paper analyzes the annual precipitation concentration degree and the distribution of concentration period by using hourly, daily and yearly precipitation observation data from 1980 to 2020. The results show that the spatial distribution of overall precipitation levels in Nantong is not uniform. There are more annual precipitation levels in the central inland area of Nantong than in the other stations. The meteorological disaster levels of short-term heavy precipitation are higher than in the other stations. The urban management difficulty of flood control and flood control and the optimization of urban pipe networks are more urgent than the other stations. The average annual precipitation of Nantong stations show the phenomenon of alternating for 8 years period, the plum rain period precipitation stations significantly more or fewer years to annual precipitation was also significantly more or less, and the plum rains period precipitation years significantly more generally in the rainfall harvest period, significantly fewer years generally located in the precipitation, water. The short-time heavy precipitation at all stations in Nantong mostly occurs in flood season (May-September). The diurnal variation conforms to the characteristics of double peak values in the Yangtze River and Huaihe River basin. The frequency of short-time heavy precipitation in Nantong urban areas is the most frequent. The increase of short-time heavy precipitation and precipitation will affect the increase of precipitation in the plum rain season and annual precipitation.

Copyright

© 2022 The Authors. Published by Atlantis Press SARL.

Open Access

This is an open access article under the CC BY-NC license.

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TY  - CONF
AU  - Rong Sun
PY  - 2022
DA  - 2022/01/24
TI  - Analysis of concentration degree and concentration period of short-time heavy precipitation and difference analysis based on Morlet wavelet analysis
BT  - Proceedings of the 2021 International Conference on Culture, Design and Social Development (CDSD 2021)
PB  - Atlantis Press
SP  - 428
EP  - 436
SN  - 2352-5398
UR  - https://doi.org/10.2991/assehr.k.220109.088
DO  - 10.2991/assehr.k.220109.088
ID  - Sun2022
ER  -