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[1]GUAN Jing,LIANG Chuan,ZHAO Lu,et al.Analysis of Applicability of Three Drought Indices in the Arid Area of Central Ningxia[J].Research of Soil and Water Conservation,2018,25(03):122-127.

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Analysis of Applicability of Three Drought Indices in the Arid Area of Central Ningxia

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 25 Number of periods: 2018 03 Page number: 122-127 Column: Public date: 2018-04-10

Title:: Analysis of Applicability of Three Drought Indices in the Arid Area of Central Ningxia

Author(s):: GUAN Jing¹, LIANG Chuan¹, ZHAO Lu^1,2, CUI Ningbo^1,2, WANG Chunyi¹; 1. State Key Lab of Hydraulics and Mountain River Engineering & College of Water Resource and Hydropower, Sichuan University, Chengdu 610065, China;
2. Provincial Key Laboratory of Water-Saving Agriculture in Hilly Areas of South China, Chengdu 610066, China

Keywords:: drought index; the arid area in central Ningxia; applicability; SPI; SPEI; K index

CLC:: P462.3

DOI:: -

Abstract:: Based on the monthly meteorological data of four meteorological stations from 1960 to 2015 of the arid area of central Ningxia, indices of SPI, SPEI, and K of spring, summer, autumn, winter and crop growing season were calculated, and the assessment results of the three drought indices were compared. The results showed that:(1) three drought indices had good correlation each other at all time scales except winter and the correlations between SPI and SPEI, between SPEI and K index were poor in winter; (2) indices of SPEI and K were relatively similar in identification of drought in spring, summer and crop growing season, and K index had the highest degree of drought assessment in autumn and winter, followed by indices of SPI and SPEI; (3) M-K trend analysis results from the three drought indices were similar, which can indicate the trend of drought in the arid area of central Ningxia; (4) K index was more effective than SPI and SPEI, and its assessment results were basically consistent with historical drought facts.

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