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| DOI：10.13522/j.cnki.ggps.20180677 |
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| Study on the Relationship between Drought Comprehensive Loss Rate and SPI in Southwest China from 1983 to 2015 |
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FENG Yi, YAO Lin, JIANG Shouzheng, LU Zehua, CUI Ningbo, LIANG Chuan, ZHAO Lu
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1.College of Water Resource and Hydropower & State Key Library of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China; 2.College of Computer Science, Sichuan University, Chengdu 610065, China; 3.Sichuan Provincial Water Authority, Chengdu 610000, China; 4. Provincial Key Laboratory of Water-Saving Agriculture in Hill Areas of Southern China, Chengdu 610066, China
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| Abstract: |
| 【Objective】This paper aims to revealing the correlation between the comprehensive drought loss rate and SPI in southwest China from 1983 to 2015. 【Method】Based on the drought disaster data in Southwest China from 1983 to 2015, the law of change and occurrence probability of drought disaster from 1983 to 2015 were studied. The meteorological data in 40 stations from 1960 to 2015 were applied to calculate the monthly, seasonal and yearly SPI. Then the correlation coefficient between SPI in different time scales and the drought comprehensive loss rate was analyzed. 【Result】The perennial average value of disaster rate, hazard rate, rejection rate and comprehensive loss rate are 11.79%、5.84%、1.30% and 4.86%. Except for Yunnan province, the drought disaster in other provinces and the whole of southwest showed a trend of decrease. From 1983 to 2015, drought disaster situation was close in the four provinces of the southwest, and drought disaster in Guizhou and Yunnan was more serious than in Guangxi and Sichuan. The probability of drought comprehensive loss rate >6% in Southwest China was 29.8%. 【Conclusion】It can be drawn the conclusions that the correlation between comprehensive loss rate and SPI was largest in May in Yunnan, and in other provinces the comprehensive loss rate has good correlation with August, summer and yearly SPI. |
| Key words: southwest China; drought disaster; SPI; correlation |
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