Analysis of precipitation and drought-flood spatio-temporal variation characteristics in Hubei Province
CHEN Shujun1, LIU Yi2, JIANG Huiming3, WENG Lixin4, GUI Dongwei2, SUN Huaiwei2,5*, LIAO Weihong5, YAN Dong1
1. College of Hydropower & Information Engineering, Huazhong University of Science & Technology, Wuhan, Hubei 430074, China; 2. Cele National Station of Observation & Research for Desert-grassland Ecosystem, Xinjiang Institute of Ecology and Geography, Urumqi, Xinjiang 830011, China; 3. Fankou Pumping Administrative Office, Ezhou, Hubei 436001, China; 4. School of Civil Enginee-ring, University of Liverpool, Liverpool L69 3BX, United Kingdom; 5. China Institute of Water Resource and Hydropower Research, Beijing 100038, China
To reveal the relationship between precipitation fluctuation and regional drought and flood characteristics in the climate change background, the characteristics of drought and flood and the spatio-temporal variation of precipitation in Hubei Province were studied by using a few indices such as PCI, RAI, SPI, PCD, PCP, LDFAI ans so on. Meanwhile, the occurrence and inter-decadal variations of drought and flood were systematically discussed. The results show that the regional precipitation is seasonal, i.e. PCI is generally between 11 and 19, but is greater than 20 in a few individual years, and the maximum and minimum RAIs occur in around July and December, respectively. Influenced by climate change and other factors, SPI exhibits fluctuation and rising trend, drought and flood occurances are persistent in different districts and the whole province in recent years. PCI and PCD values in each district are relatively large, specially the larger the PCP is, the earlier the rainy season is, and the more likely flood occurs, showing an inceasing risk of flood, particuallry in Southwestern Hubei. The characteristics of inter-decadal changes in the province are obvious. According to the frequency and intensity of drought and flood, the inter-decadal changes are ranked in an order 1960s>2010s>1970s>2000s>1990s>1980s. The results obtained in this paper have importantly theoretical and practical significance for understanding of the characteristics of regional drought and flood change and preventing natural disasters.
CHEN Shu-Jun-,LIU Yi-,JIANG Hui-Ming- et al. Analysis of precipitation and drought-flood spatio-temporal variation characteristics in Hubei Province[J]. Journal of Drainage and Irrigation Machinery Engin, 2019, 37(3): 248-250.