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中国农学通报 ›› 2016, Vol. 32 ›› Issue (5): 152-158.doi: 10.11924/j.issn.1000-6850.casb15090002

所属专题: 农业气象

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

基于Z 指数的聊城地区干旱时空特征分析

李楠,孙培良,韩莎莎,李慧   

  1. 聊城市气象局,聊城市气象局,山东省气象局,聊城市气象局
  • 收稿日期:2015-09-06 修回日期:2015-10-21 接受日期:2015-10-23 出版日期:2016-02-19 发布日期:2016-02-19
  • 通讯作者: 孙培良
  • 基金资助:
    聊城气象科学技术研究项目“聊城市农业气候资源演变特征及合理利用对策”(2014lcqx02)。

Analysis of Spatial and Temporal Characteristics of Drought in Liaocheng Region Based on Z Index

李楠,, and   

  • Received:2015-09-06 Revised:2015-10-21 Accepted:2015-10-23 Online:2016-02-19 Published:2016-02-19

摘要: 为了了解聊城市自然降水的亏缺状况,探索聊城区域内干旱规律。利用聊城地区8 个气象站1970—2010 年逐月降水资料,采用Z 指数方法计算各站旱涝指标,在此基础上确定旱涝等级,从时间和空间2 个方面对聊城地区40 多年干旱特征进行分析。结果表明:年际变化中,旱涝交替发生,易发生连续性气象干旱,总体干旱多于涝,旱涝3 年和7 年周期显著。空间分布中,特旱东北地区高于西南地区,大旱东部地区高于西部地区,偏旱西部高于东部,总的干旱西北部地区最高。

关键词: 中低产田, 中低产田, 时空分布, 限制因素, 天津

Abstract: The paper aims to understand the natural precipitation deficit and explore the law of drought in Liaocheng. Based on 8 stations’monthly precipitation data in 1970- 2010, Z index method was used to calculate the drought and flood index. Then the drought and flood levels were determined, and drought characteristics of more than 4 decades were analyzed from 2 aspects of time and space in Liaocheng. The results showed that in inter-annual variation, drought and flood appeared alternatively and continuous drought was prone to happen. Overall, there were more droughts than floods. The 3 years and 7 years cycle of droughts and floods were obvious. In spatial distribution, there were more extremely severe droughts in the northeast than that in the southwest, severe droughts happened more often in the eastern area than that in the western area, and there were more droughts in the west than that in the east. The highest drought frequency was found in the northwest.

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