Analysis of Heavy Rain and Risk Assessment in the Main Flood Season of the Yangtze River Basin in 2020

DOI

10.2991/aebmr.k.210409.007How to use a DOI?

Keywords

Floods in the Yangtze River Basin, rainstorm disasters, risk analysis, dynamic assessment, Poyang Lake Basin

Abstract

Affected by heavy rainfall, the Yangtze River’s 2020 floods No. 1 and No. 2 formed in the upper reaches of the Yangtze River on July 2 and 17, respectively. In order to explore the specific change process and impact of this heavy rainfall, this paper uses high-resolution precipitation fusion data, which is based on Himawari-8 stationary meteorological satellite data and GPM-IMERG data generation. And using the data from the ground weather station of the China Meteorological Administration, the analysis of rainfall conditions and the risk assessment of rainstorm disasters in the Yangtze Basin were carried out. The assessment period is the main flood season in 2020, from June 1 to July 19.The main contents and conclusions include: (1) The rainstorm in the Yangtze River Basin mainly affected the middle and lower reaches of the Yangtze River, with northeast Hunan, southern Hubei, Jiangxi and southern Anhui seriously affected; the prefecture level cities mainly affected were Yiyang and Yueyang in Hunan, Jingzhou, Wuhan and Ezhou in Hubei, Shangrao, Jiujiang, Nanchang in Jiangxi, Anqing and Xuancheng in Anhui; the main affected basins were Poyang Lake,Taihu Lake and Dongting Lake. Among them, Poyang Lake Basin is the most seriously affected. (2) Heavy rainfall mainly occurred in late June and early July, and the accumulated rainfall exceeded 1000mm every 10 days. (3) Compared with the rainfall of the Yangtze River Basin in 1998, it is found that the distribution range of heavy rainfall in 2020 is less than that in the same period of 1998, but the rainfall is significantly higher than that in the same period of 1998, and the seriously affected Poyang Lake Basin exceeds the historical value of the same period. (4) Most areas in the lower reaches of the Yangtze River Basin are high risk areas. Dongting Lake Basin, Poyang Lake Basin and Taihu Lake Basin are high risk areas.

Copyright

© 2021, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Zijie Jiang
AU  - Xiaoya Wang
AU  - Weiguo Jiang
AU  - Dabin Ji
PY  - 2021
DA  - 2021/04/12
TI  - Analysis of Heavy Rain and Risk Assessment in the Main Flood Season of the Yangtze River Basin in 2020
BT  - Proceedings of the 9th Annual Meeting of Risk Analysis Council of China Association for Disaster Prevention (RAC 2020)
PB  - Atlantis Press
SP  - 47
EP  - 53
SN  - 2352-5428
UR  - https://doi.org/10.2991/aebmr.k.210409.007
DO  - 10.2991/aebmr.k.210409.007
ID  - Jiang2021
ER  -