Feasibility Study of Five Drought Indices for Use in Yunnan Province
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 feasibil-ity 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 re-sults 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.
国家科技期刊平台
NSTL
万方数据
维普
