杨小利,杨兴国.陇东主要农作物旱灾综合评估指数的多时间尺度分析[J].干旱地区农业研究,2009,27(2):17~20
陇东主要农作物旱灾综合评估指数的多时间尺度分析
The complex evaluating index for main crops’drought disasters and its multiple time scales analysis in Longdong loess plateau
  
DOI：10.7606/j.issn.1000-7601.2009.02.04
中文关键词:  陇东黄土高原  农作物  旱灾指数  小波分析
英文关键词:agricultural drougth index  main crop  wavelet analysis  Longdong loess plateau
基金项目:中国气象局新技术应用推广项目(CMATG2005M22)
作者单位
杨小利 Lanzhou Institute of Arid Meteorology China Meteorological Administration Gansu Key Laboratory of Arid Climatic Change and Reducing Disaster，Lanzhou，Gansu 730020，China；Pingliang Meteorological Bureau，Pingliang，Gansu 744000，China 
杨兴国 Lanzhou Institute of Arid Meteorology China Meteorological Administration Gansu Key Laboratory of Arid Climatic Change and Reducing Disaster，Lanzhou，Gansu 730020，China 
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中文摘要:
      综合考虑水分亏缺量,持续时间、作物水分敏感度等几个因素,建立陇东农业旱灾综合评估指数。应用小波分析方法,进一步分析该区冬小麦、玉米等主要作物生育期不同时段旱灾指数的多时间尺度特征,在此基础上对该区农业旱灾的演变趋势做了初步的探讨和评估。
英文摘要:
      A complex index of evaluating agricultural drought disasters was explored considering some factors such as water shortage degree the duriation and sensitivity of crops to water shortage etc． and the index can be applied in monitoring and evaluating agricultral drought disasters．Multiple time scales charateristics of main crops’drought index was further analysed by using the wavelet analysis method which can provide some references for rational use of climatic resources and making decisions.
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