[1]SUN Lijuan,CHEN Jinhua,XU Yang,et al.Spatial and Temporal Evolution of Heavy Rainfall Disasters in Anhui Province in Recent 45 Years Based on Multi-indictors[J].Research of Soil and Water Conservation,2020,27(03):128-133.
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Spatial and Temporal Evolution of Heavy Rainfall Disasters in Anhui Province in Recent 45 Years Based on Multi-indictors
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
27
Number of periods:
2020 03
Page number:
128-133
Column:
目次
Public date:
2020-04-20
- Title:
- Spatial and Temporal Evolution of Heavy Rainfall Disasters in Anhui Province in Recent 45 Years Based on Multi-indictors
- CLC:
- P426.6
- DOI:
- -
- Abstract:
- The frequent occurrence of heavy rainfalls has caused great harm to human society, and it is important to explore its temporal and spatial characteristics. By using the daily precipitation data of 77 meteorological stations and provincial grain yield records in Anhui province during 1973—2017, the spatio-temporal variability of heavy rainfalls disasters were evaluated with precipitation indicator groups. The main results are as follows.(1)Based on the multi-annual average of 11 precipitation indices of each station, the principal component analysis(PCA)showed that the extreme and persistence of heavy rainfalls in Anhui Province presented a notable north-south gradient, and the high values mainly concentrated in the south area.(2)The correlation analysis between precipitation indices of each station and provincial total area affected by floods indicated that the total precipitation of extreme rainy days(P95)was the most effective indicator for waterlogging disasters.(3)By using PCA, Anhui could be divided into six sub-regions with different temporal variations in P95 such as south-central area, north-central area, south area, northwest corner, northeast corner, northernmost area, and most of Anhui had been dominated by the strong increase of P95 since 2003.(4)The provincial summer and autumn grain yield was more sensitive to the inter-annual anomalies of P95 in north-central area, especially the increasing trend of P95 in north-central area during recent 45 years brought the decrease of summer grain yield by 0.72%. The study results can be used as a reference for assessing the possible impact of climate change on food production security in Anhui Province.
- References:
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Last Update:
2020-04-30