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| DOI： |
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| Feasibility Study of Five Drought Indices for Use in Yunnan Province |
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WANG Liping, WANG Shufang, WANG Xinhua , ZHANG Liudong, WANG Fulai
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College of Water Conservancy, Yunnan Agricultural University, Kunming 650201, China;College of Hydrology and Water Resources, Hohai University, Nanjing 210098, China;College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China
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| Abstract: |
| Drought indices are a critical parameter in drought research, but their calculation varies widely and the validation of every index is limited to certain conditions. In this paper, we analyzed the drought indices suitable for use in Yunnan Province. Five indices were examined, which are Pa, MI, SPI, SPEI and CInew, and their feasibility were analyzed based on precipitation and temperature measured monthly at 29 meteorological stations from anuary 1960 to December 2014 in different regions and seasons across the province. The results showed that in spring and winter, SPI was more suitable for northwest and northeast of the province. In contrast, SPI and Pa worked better for the central province, Pa was more appropriate for southwestern Yunnan, and CI newper formed better in southeast. In summer and autumn, SPI was more reliable in northwest, while the SPEI provided better results for other four regions. Our test also revealed that SPI predicted the serious droughts occurring in winters and springs in the province from December 2009 to March 2010 more accurately than other four indices. |
| Key words: drought indices; monthly scale; applicability; comparative analysis |
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