| 西北干旱区近50a旱涝时空变化及其防御措施研究 |
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| 引用本文： | 任朝霞,杨达源.西北干旱区近50a旱涝时空变化及其防御措施研究[J].干旱区资源与环境,2006,20(6):118-121. |
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| 作者姓名： | 任朝霞 杨达源 |
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| 作者单位： | 1. 长安大学地球科学与国土资源学院,西安,710054
2. 南京大学城市与资源学系,南京,210093 |
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| 摘 要： | 本文选取近50a西北干旱区21个代表站点降水量数据,采用Z指数法确定西北干旱区旱涝等级,分析近50a来西北干旱区旱涝时空变化。结果表明,从90年代起,旱涝灾害交替发生。干旱比多雨发生多,尤其在新疆的西部和南部旱灾发生频繁,但严重多雨比严重干旱更多发生。最后针对旱涝灾害提出防御措施。
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| 关 键 词： | 旱涝等级 时空变化 防御措施 西北干旱区 |
| 文章编号： | 1003-7578（2006）06-118-04 |
| 收稿时间： | 2005-08-19 |
| 修稿时间： | 2005年8月19日 |
Study on Spatio-temporal Changes of Drought and Flood in the Arid Region of Northwest China in Resent 50 Years and the Countermeasures |
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| REN Zhao-xia,YANG Da-yuan.Study on Spatio-temporal Changes of Drought and Flood in the Arid Region of Northwest China in Resent 50 Years and the Countermeasures[J].Journal of Arid Land Resources and Environment,2006,20(6):118-121. |
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| Authors: | REN Zhao-xia YANG Da-yuan |
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| Institution: | 1. Institute of Earth Science And Land Resources, Changan University, Xian 710054; 2. Department of Urban And Resources Sciences, Nanjing University, Nanjing 210093, China |
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| Abstract: | Based on the precipitation data of 21 representative stations in resent 50 years,used Z index methodto analyze the changes of space-time drought and flood in the arid region of Northwest china.The results showed that disasters of drought and flood happened by turns from 1990.Frequencies of drought were more than that of flood,especially in the western and southern of Xinjiang,but frequency of severe floods were more than that of drought.Finally we put forward counter measures to the disasters of drought and flood. |
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| Keywords: | grade of drought and flood spatio-temporal change counter measure the arid region of Northwest China |
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