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- Title
The evolution analysis of flood and drought in Huai River Basin of China based on monthly precipitation characteristics.
- Authors
Yan, Deng-Hua; Han, Dong-Mei; Wang, Gang; Yuan, Yong; Hu, Yong; Fang, Hong-yang
- Abstract
Based on the daily precipitation data of 38 weather stations in the Huai River Basin from 1961 to 2010, this study used SPI index, P-III curve to determine the flood/drought years, under what situations for droughts and floods easily happen, and to analyze the evolution law of flood and drought during inter-annual and intra-annual based on the characteristic of monthly precipitation. The results showed that: (1) annual rainfall of the Huai River Basin presented decreasing trend, maximum rainfall appeared from June to August, and multi-year average precipitation increased gradually from north to south; (2) the variation of monthly precipitation during flood years was more severe than other typical years, and precipitation in drought years showed nearly 50 % decline compared with normal years; (3) high rainfall of flood years was mainly caused by the increase in rainfall in flood season, and the strategy of flood control and drought relief was 'short-term flood prevention and long-term drought relief'; (4) while precipitation of most months in drought year was reduced, the relevant strategies 'annual basin-wide of long-term drought prevention' should be carried out; (5) combination events of floods and droughts occurred frequently. Persistent drought dominated in spring and summer while droughts and floods that happened alternately were mainly in summer and autumn.
- Subjects
HUAI River (China); FLOODS; NATURAL disasters; DROUGHTS; RAINFALL
- Publication
Natural Hazards, 2014, Vol 73, Issue 2, p849
- ISSN
0921-030X
- Publication type
Article
- DOI
10.1007/s11069-014-1109-4