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Evolution Characteristics of Seasonal Drought in Hunan Based on the Standardized Precipitation Index (SPI)

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DOI: 10.23977/geors.2019.21004 | Downloads: 42 | Views: 2257

Author(s)

Yong Zhang 1,2, Jiao Wang 1,2, Zuren Shen 1,2, Xiongfeng Xie 1

Affiliation(s)

1 School of Resource, Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
2 School of Education, Hunan University of Science and Technology, Xiangtan 411201, China

Corresponding Author

Yong Zhang

ABSTRACT

Seasonal drought frequently occurred in Hunan, which had a profound impact on agricultural production. Analysis of the characteristics and laws of the evolution of drought in Hunan can provide a theoretical basis for the formulation of regional drought resistance and disaster reduction countermeasures responding to global climate change. The study of Hunan Province 14 cities (prefectures) of meteorological stations’ precipitation data, selects the standardized precipitation index (SPI) as the drought index to calculate the area of Hunan Province in the last 20 years (1989-2008) each month’s drought index. Based on the precipitation data of 14 meteorological stations in Hunan Province, each month’s Standard Precipitation Index (SPI) in recent 20 years (1989-2008) was calculated. Based on the above analysis, the station proportion of seasonal drought frequency of annual and season and inter-annual variation of drought intensity were analyzed. The results show that the degree of drought increases with different degrees of the timescale; the seasonal characteristics of summer drought and autumn drought are aggravating trend, and the spring drought is the second; the drought is more severe in the central-southern Hunan Province, and is relatively light in the northeastern.

KEYWORDS

drought, Standardized Precipitation Index (SPI), Station Proportion of Drought Frequency, Drought Intensity

CITE THIS PAPER

Yong Zhang, Jiao Wang, Zuren Shen and Xiongfeng Xie, Evolution Characteristics of Seasonal Drought in Hunan Based on the Standardized Precipitation Index (SPI). Geoscience and Remote Sensing (2019) Vol. 2: 56-64. DOI: http://dx.doi.org/10.23977/geors.2019.2100

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