地理科学 ›› 2014, Vol. 34 ›› Issue (11): 1391-1398.doi: 10.13249/j.cnki.sgs.2014.011.1391

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东江流域近50年旱涝时空演变特征

何艳虎(), 陈晓宏, 林凯荣, 吴孝情   

  1. 中山大学水资源与环境研究中心 华南地区水循环和水安全广东普通高校重点实验室, 广东 广州 510275
  • 收稿日期:2013-09-06 修回日期:2013-11-12 出版日期:2014-11-10 发布日期:2014-11-10
  • 作者简介:

    作者简介:何艳虎(1986-),男,河南息县人,博士研究生,主要从事水文与水资源方面的研究。E-mail:heyanhu456@163.com

  • 基金资助:
    国家自然科学基金国际合作重大和重点项目(51210013)、国家科技支撑计划(2012BAC21B0103)、水利部公益项目(201201094,201301002-02)、广东省水利科技创新项目(2011-11,2009-39)广东省科技厅项目(2010B050300010)、广州市珠江科技新星专项(2011J2200051)资助

Characteristic of the Spatio-temporal Distribution of Droughts and Floods in the Dongjiang Basin in Recent 50 Years

Yan-hu HE(), Xiao-hong CHEN, Kai-rong LIN, Xiao-qing WU   

  1. Center for water resources and environment, SunYat-sen University, Key Laboratory of Water cycle and water security in Southern China of Guangdong Higher Education Institutes, SunYat-sen University, Guangzhou,Guangdong 510275,China
  • Received:2013-09-06 Revised:2013-11-12 Online:2014-11-10 Published:2014-11-10

摘要:

基于东江流域57个站点1957~2010年逐月降雨数据,对比分析SPI和Z指数两种方法在流域旱涝等级划分中的应用,揭示流域近50 a来旱涝时空分布特征及其变化趋势。结果表明:① SPI和Z指数两种方法计算旱涝指标所得结果差异度较小,均能较好地反映流域历史实际旱涝状况,Z指数对极端旱涝等级具有更好的指示作用;② 近50 a来,流域各年代旱涝交替明显,偏涝和重涝多于偏旱和重旱;③ 流域汛期、非汛期和全年旱涝分布形态在空间上有较好的一致性;④ 近50 a来,流域总体上呈“北旱南涝”的旱涝变化趋势空间格局。

关键词: 东江流域, SPI, Z指数, 旱涝

Abstract:

Based on monthly precipitation data of 57 stations in the Dongjiang Basin in 1957-2010, comparative analysis of application of the classification of droughts and floods by SPI and Z index methods was did and spatial and temporal distribution characteristics of droughts and floods of the basin in recent 50 years in and its change trend were analyzed. The result showed that: 1) The result for the index of droughts and floods by the SPI method was close to that of the Z index method, which can reflect the actual state of droughts and floods in the basin under three time scales: the flood, non-flood season and the whole year. The Z index method was better when it comes to the extreme droughts grade. 2) Alternating droughts and floods for each decade was obvious in the past 50 years. Floods and extreme floods were more than droughts and extreme droughts. 3) Spatial distribution patterns of droughts and floods in flood, non-flood season and the whole year were consistent and trends of droughts and floods in the south and north were opposite. The spatial distribution of droughts and floods in non-flood season was similar to that of the whole year. 4) On the whole, the Dongjiang Basin had a trend of floods in the south and droughts in the north in the future.

Key words: the Dongjiang Basin, SPI, Z-index, droughts and floods

中图分类号: 

  • P338+6