Study on the Characteristics and Persistence of Precipitation Changes in the Lower Reaches of Yangtze River Basin

DOI

10.2991/978-94-6463-336-8_75How to use a DOI?

Keywords

the lower reaches of Yangtze River Basin; precipitation; trend; persistence; spatiotemporal characteristics

Abstract

To explore the differences in precipitation among different regions and the persistence of precipitation trends in the future over the lower reaches of Yangtze River Basin (LYRB), we used precipitation data from meteorological stations in the LYRB from 1980 to 2020. The Pettitt method, Mann-Kendall (M-K) test, and Hurst exponent method were applied to determine the occurrence of precipitation change points, spatial-temporal characteristics, and their persistence in the three sub-regions of the LYRB, namely mainstream region (MR), Taihu Lake region (TLR), and northeast region (MR). The results show that the change points for the three regions occurred in 2008, 2007, and 2013, respectively. The average annual precipitation in period 2 increased by 9.4%, 14.9%, and 23.9% relative to period 1, and the range of precipitation centers expanded significantly. In period 2, a new precipitation center appeared in the TLR. The precipitation changes in the LYRB ranged from -1.44 mm/a to 9.34 mm/a. The southern and northern parts of the TLR and the central part of the NR showed a significant increasing trend in precipitation. Most areas of the MR are projected to experience decreasing precipitation in the future, while the TLR and the NR are expected to continue experiencing an increasing trend. As the accumulation time of characteristic precipitation increases, the differences in precipitation trends among regions will become more pronounced, and more regions may exhibit opposite trends compared to the current conditions.

Copyright

© 2023 The Author(s)

Open Access

Open Access This chapter is licensed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/), which permits any noncommercial use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license and indicate if changes were made.

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TY  - CONF
AU  - Kaidong Lu
AU  - Tingting Cui
AU  - Yintang Wang
AU  - Yong Liu
AU  - Shouwei Shang
PY  - 2023
DA  - 2023/12/30
TI  - Study on the Characteristics and Persistence of Precipitation Changes in the Lower Reaches of Yangtze River Basin
BT  - Proceedings of the 2023 9th International Conference on Architectural, Civil and Hydraulic Engineering (ICACHE 2023)
PB  - Atlantis Press
SP  - 652
EP  - 665
SN  - 2352-5401
UR  - https://doi.org/10.2991/978-94-6463-336-8_75
DO  - 10.2991/978-94-6463-336-8_75
ID  - Lu2023
ER  -