| 基于SPEI和RDI的曲靖大型灌区干旱趋势研究 |
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| 引用本文： | 王琳. 基于SPEI和RDI的曲靖大型灌区干旱趋势研究[J]. 安徽农业科学, 2018, 46(7): 165-169. DOI: 10.3969/j.issn.0517-6611.2018.07.051 |
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| 作者姓名： | 王琳 |
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| 作者单位： | 云南林业职业技术学院,云南昆明,650204 |
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| 基金项目： | 云南省应用基础研究项目 |
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| 摘 要： | 干旱演变趋势对灌区水资源开发利用及防灾、减灾具有重要意义。以曲靖大型灌区为研究对象,收集灌区内沾益、陆良、曲靖3个气象站近40年月平均降水、月平均温度数据,计算得到12个月尺度的标准化降水蒸发指数(SPEI)和干旱侦测指数(RDI)的干旱指数,以Man-Kendall等趋势检测方法分析曲靖灌区干旱趋势,同时借助于Hurst指数,分析趋势的持续性。研究表明,采用考虑温度影响的SPEI与RDI计算3个站点的干旱指数是较为合理;3站发生的干旱次数大致相同,且灌区总体趋于干旱化,同时,干旱化趋势具有持续性。
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| 关 键 词： | 干旱 标准化降水蒸发指数 干旱侦测指数 趋势 |
Study on Drought Trend of Large Irrigation District in Qujing Based on SPEI and RDI |
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| WANG Lin. Study on Drought Trend of Large Irrigation District in Qujing Based on SPEI and RDI[J]. Journal of Anhui Agricultural Sciences, 2018, 46(7): 165-169. DOI: 10.3969/j.issn.0517-6611.2018.07.051 |
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| Authors: | WANG Lin |
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| Abstract: | The trend of drought evolution is of great significance to the development and utilization of water resources in irrigation areas, and to disaster prevention and disaster reduction.Taking the large irrigation area in Qujing as the research object, Zhanyi, Luliang and Qujing 3 meteorological stations in the irrigation area nearly 40 years of monthly precipitation and monthly mean temperature data was collected, the drought index 12 months scale SPEI and RDI calculated by Man-Kendall method, trend analysis of Qujing irrigation drought trend, with the Hurst index, the persistent trend analysis.The results showed that the drought index of 3 sites was more reasonable when considering the tem-perature influence of SPEI and RDI.The number of droughts at the 3 stations was almost the same, and the irrigation area tended to become arid.Meanwhile, the trend of drought was persistent. |
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