Evolution Characteristics of Seasonal Drought in Hunan Based on the Standardized Precipitation Index (SPI)
DOI: 10.23977/geors.2019.21004 | Downloads: 42 | Views: 2257
Yong Zhang 1,2, Jiao Wang 1,2, Zuren Shen 1,2, Xiongfeng Xie 1
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 AuthorYong Zhang
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.
KEYWORDSdrought, 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
 Zuo Lifang, Qiu Caixing (2000). The characteristics drought and influence on economy in Hunan. Economic Geography, vol.20, no.2, p.36-39.
 Yuan Wenping, Zhou Guangsheng (2004). Comparison between Standardized Precipitation Index and Z-index in China. Acta phytoecologica sinica, vol.28, no.4, p.523-529.
 Meteorological drought level (GB/T 20481, 2006), China Standard Press, 2006.
 Liu Xiaogan (2000). Causes of formation analyzing and countermeasures of drought in Hunan province. Water Saving Irrigation, vol.20, no.4, p.13-16.
 Yuan Wenping, Zhou Guangsheng (2004). Theoratical study and research prospect on drought indices. Advances in Earth Science, vol.19, no.6, p.982-991.
 Zhou Qiao-lan, Lu Xiao-yan (2005). On the drought of South China. Journal of Shanghai Normal University (Natural Sciences), vol.34, no.3, p.80-86.
 Jian Maoqiu, Qiao Yunting, Wen Zhiping (2008). Analysis on Characteristics of Seasonal and Inter-seasonal Drought Events in South China. Acta Scientiarum Naturalium Universitatis Sunyatseni, vol.47, no.4, p.118-121.
 Huang Wanhua, Yang Xiaoguang, Li Maosong, Zhang Xiaoyu, Wang Mingtian, Dai Shuwei, Ma Jiehua (2010). Evolution characteristics of seasonal drought in the south of China during the past 58a based on Standardized Precipitation Index. Transactions of the Chinese Society of Agricultural Engineering, vol.26, no.7, p.50-59.