| 汉江上游安康市近50年旱涝特征分析 |
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| 引用本文： | 彭维英,殷淑燕,刘晓玲,王德丽,鲍小娟.汉江上游安康市近50年旱涝特征分析[J].江西农业学报,2011,23(5). |
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| 作者姓名： | 彭维英 殷淑燕 刘晓玲 王德丽 鲍小娟 |
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| 作者单位： | 陕西师范大学旅游与环境学院,陕西西安,710062 |
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| 基金项目： | 国家自然科学基金重点项目，中央高校基本科研业务费专项基金项目 |
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| 摘 要： | 根据1961~2009年汉江上游安康市逐月降水资料,利用Z指数旱涝指标划分了7个旱涝等级,并对旱涝发生的时间演变规律及成因进行了初步分析。分析结果表明:Z指数能较好地反映本区的旱涝变化情况,近50年安康市由偏涝向偏旱发展,与降水量以4.9 mm/10 a的速率呈减少趋势一致。四季的Z指数变化趋势表现出明显不同,春、秋季略呈下降趋势,为干旱增强趋势;夏、冬季呈上升趋势,为洪涝增强趋势。在1982~1986年间,安康市发生了明显的降水趋势转型,春秋季降水减少,夏冬季降水增多。且从1998年之后,降水表现出波动大、不稳定的特征,四季Z指数年际间波动幅度都较大,旱涝灾害明显增多。进入21世纪以后,旱涝灾害发生频率明显增加。
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| 关 键 词： | 降水 Z指数 旱涝灾害 特征 安康市 |
Analysis of Drought-flood Characteristics in Ankang City Located at Upper Reaches of Hanjiang River in Recent 50 Years |
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| PENG Wei-ying,YIN Shu-yan,LIU Xiao-ling,WANG De-li,BAO Xiao-juan.Analysis of Drought-flood Characteristics in Ankang City Located at Upper Reaches of Hanjiang River in Recent 50 Years[J].Acta Agriculturae Jiangxi,2011,23(5). |
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| Authors: | PENG Wei-ying YIN Shu-yan LIU Xiao-ling WANG De-li BAO Xiao-juan |
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| Institution: | PENG Wei-ying; YIN Shu-yan; LIU Xiao-ling; WANG De-li; BAO Xiao-juan(College of Tourism and Environment; Shaanxi Normal University; Xi an 710062; China); |
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| Abstract: | Based on the data of the monthly precipitation in Ankang city located at the upper reaches of the Hanjiang River from 1961 to 2009,seven drought-flood grades were compartmentalized by Z-index.The temporal evolution law and causes of drought-waterlogging occurrence were analyzed.The results indicated that the Z-index could reflect the changeable features of drought-flood in Ankang city well.In the recent 50 years,Ankang city developed from partial waterlogging to partial drought,and it was in accordance with... |
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| Keywords: | Precipitation Z-index Drought and flood Characteristics Ankang |
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