Abstract
To analyze the characteristics of drought and flood variations in Quanzhou during recent 55 years, the standardized precipitation index (SPI) and Empirical Orthogonal Function (EOF) and Rotated Empirical Orthogonal Function (REOF) were calculated by using the monthly precipitation data from 6 meteorological bureaus across Quanzhou for 1960-2014. Results showed that: 1) During 1960-2014, the drought and flood showed Periodic variation characteristics in Quanzhou, the specific period of frequent drought was 1963-1972, 1977-1986 and 2009-2011, and the specific period of frequent flood was 1961-1962, 1972-1975, 1990-1992 and 1997-2007; the drought and flood did not have significant tendency of variation in Spring and Summer, and the drought and flood showed a non-significant downward trend in Autumn and Winter. 2) The drought and flood variation had relatively consistent trend in Quanzhou, but there was a big difference on the northwest mountainous area, the middle semi-mountainous area and the southeast coast area in some periods. 3) The precipitation cell and distribution in every season were Nan’an and Anxi, but there was a big difference in rainfall less area: it was Yongchun and Dehua in Spring, Chongwu and Jinjiang in Summer, Chongwu in Autumn, Dehua and Chongwu in Winter.
Highlights
The loss caused by meteorological disasters is huge, and in meteorological disasters, the effects of droughts and floods are the most serious [1]
2) The drought and flood variation had relatively consistent trend in Quanzhou, but there was a big difference on the northwest mountainous area, the middle semi-mountainous area and the southeast coast area in some periods
3) The precipitation cell and distribution in every season were Nan’an and Anxi, but there was a big difference in rainfall less area: it was Yongchun and Dehua in Spring, Chongwu and Jinjiang in Summer, Chongwu in Autumn, Dehua and Chongwu in Winter
Summary
The loss caused by meteorological disasters is huge, and in meteorological disasters, the effects of droughts and floods are the most serious [1]. Located on the southeastern coast of Fujian Province, Quanzhou is a subtropical marine monsoon climate. It is located in the middle section of the Jidong Mountains and in the middle of the hilly plain on the southeast coast of Fujian. The terrain is low in the northwest and high in the southeast, and has the topography and landforms of mountains, hills and coastal plains. Drought and flood disasters often occur and it is one of the most severe meteorological disasters in Quanzhou. It has become an important factor that restricts socio-economic sustainable development in Quanzhou
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