水资源保护Issue(2)：7-14,8.DOI:10.3880/j.issn.10046933.2015.02.002
标准化降水指数与有效干旱指数在新疆干旱监测中的应用
Application of standardized precipitation index and effective drought index in drought monitoring in Xinjiang
摘要
Abstract
Based on the drought monitoring theory and daily precipitation data covering the period of 1961-2010 in Xinjiang, we compared and analyzed the effectiveness and practicability of the effective drought index ( EDI) and standardized precipitation indexes ( SPI ) based on different time scale ( 1-, 3-, 6-, 9-, 12-, 24-month ) .The result shows that EDI is more superior to SPI no matter for short-term drought or long-term drought .SPI of short-term scale is greatly influenced by short duration precipitation , which obviously reflects the variation of drought and flood in short period in Xinjiang .With the expanding of time scale , SPI gradually loses its feedback from short duration precipitation .However , it can still reflect the obvious trend of drought and flood over the long-term scale . Like SPI, EDI can also reflect the influence caused by short-term drought and recent precipitation .Moreover, with the time passing by , EDI is able to give different weight to everyday precipitation considering the influence to the current drought statues caused by former precipitation .Relevant researches can provide significant theoretical basis to the drought monitoring in humid and some other climatic zones .关键词
标准化降水指标/有效干旱指数/干旱监测/新疆Key words
standardized precipitation index ( SPI)/effective drought index ( EDI)/drought monitoring/Xinjiang分类
农业科技引用本文复制引用
慈晖,张强,白云岗,张江辉..标准化降水指数与有效干旱指数在新疆干旱监测中的应用[J].水资源保护,2015,(2):7-14,8.基金项目
新疆维吾尔自治区科技计划（201331104）、教育部“新世纪优秀人才支持计划”与中山大学滨海小流域自然地理综合过程观测与实验平台建设（2012）共同资助 （）
