西江流域水文干旱时空特征分析
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S423

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全国优秀博士学位论文作者专项资金(201161);教育部新世纪优秀人才支持计划(NCET-12-0842);水利部公益性行业科研专项(201301040);国家自然科学基金(51579065);江苏省研究生科研创新计划项目(2014B35014)


Analysis on spatial and temporal characteristics of hydrological drought in Xijiang River Basin
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    摘要:

    选取1951—2010年西江干、支流上5个典型水文站的实测日径流资料,基于标准化径流干旱指数(SRDI)研究了西江流域水文干旱的时空变化特征。结果表明:(1)1951—2010年西江流域的水文干旱主要发生在1950 s、1960 s和2000 s,1950 s冬季、1960 s春季、1980 s夏季和2000 s秋季是干旱频发的时期;(2)西江年最大干旱日数在同一站点连续出现的时间不超过5年。流域内轻旱的发生范围有扩大趋势,而极旱则相反,多向区域发展。(3)西江流域的水文干旱具有区域性,4条支流同期的干旱发生水平差异较大,过去60年间只1963年、1989年、1991年、2009年和2010年4条支流同时发生了水文干旱。

    Abstract:

    Selecting data of daily runoff acquired from 5 typical hydrological stations along main stream and tributaries of Xijiang River over the past 60 years, the spatial and temporal characteristics of hydrological drought in Xijiang River basin are studied based on the standardized runoff drought index(SRDI). The results show that: (1)Hydrological droughts in Xijiang River Basin mainly occur in 1950s, 1960s and 2000s. Besides, the prone periods include 1950s’ winter, 1960s’ spring, 1980s’ summer and 2000s’ autumn. (2)The annual maximum droughts days continuously appear in any site are shorter than 5 years. The occurrence areas of light droughts have the tendency to expand, while the extreme droughts are likely to be more regionalized. (3)Hydrological droughts in Xijiang River Basin are of significant regional characteristic that drought severities of 4 tributaries are diverse during the same typical drought years. Statistically, the years when droughts are monitored in 4 tributaries simultaneously are only in 1963, 1989, 1991, 2009 and 2010.

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吴志勇,林青霞.西江流域水文干旱时空特征分析[J].水资源保护,2016,32(1):51-56.(WU Zhiyong, LIN Qingxia. Analysis on spatial and temporal characteristics of hydrological drought in Xijiang River Basin[J]. Water Resources Protection,2016,32(1):51-56.(in Chinese))

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  • 收稿日期:2015-10-29
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  • 在线发布日期: 2016-01-26
  • 出版日期: 2016-01-20