SPI-based evaluation of drought events in Xinjiang, China

Qiang Zhang (), Jianfeng Li, Vijay Singh and Yungang Bai

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2012, vol. 64, issue 1, 492 pages

Abstract: Daily precipitation data for 1957–2009 from 53 stations in the Xinjiang, China, are analyzed, based on the Standardized Precipitation Index (SPI) with the aim to investigate spatio-temporal patterns of droughts. The Mann–Kendall trend test is used to detect the trends in the SPI values of monthly drought series, drought severity and drought duration. The frequencies of moderate, severe and extreme droughts are higher in the North Xinjiang, while mild droughts occur more often in the South Xinjiang. A decreasing frequency of droughts in the North Xinjiang is found in winter, but a drying tendency is detected in the western parts of the North Xinjiang during spring, summer and autumn, which may be harmful for agriculture. The South Xinjiang seems to be getting wetter in summer, while the south parts of the South Xinjiang seem to be getting drier in spring. The middle of the East Xinjiang is identified to be in a slightly dry tendency. The drought severity is decreasing and drought duration is getting shorter in the North Xinjiang, while both of them increase in the southern parts of the South Xinjiang. In addition, droughts in the middle parts of the East Xinjiang are intensifying. Copyright Springer Science+Business Media B.V. 2012

Keywords: Drought variations; Standardized Precipitation Index; Mann–Kendall trend test; Xinjiang (search for similar items in EconPapers)
Date: 2012
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DOI: 10.1007/s11069-012-0251-0

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