干旱区生态环境知识资源中心(Arid): 辽西北半干旱地区旱灾时空演变特征分析

Arid

	辽西北半干旱地区旱灾时空演变特征分析
其他题名	Analysis on Spatial and Temporal Evolution Characteristics of Drought in Semiarid Region of Northwest Liaoning
	薛文; 刘娟; 迟道才
来源期刊	沈阳农业大学学报
ISSN	1000-1700
出版年	2015
卷号	46 期号:3 页码:379-384
中文摘要	中国辽西北半干旱地区多年来旱灾频发,已严重制约该地区的经济发展与人民生活水平的提高。为探索辽西北半干旱地区旱情特征及其发生规律,选取1965~2006年降雨量数据,采用标准化降水指数(standardized precipitation index,SPI)方法对辽西北半干旱地区历年干旱的频率、覆盖面积及强度特征进行计算,分析干旱的时间及空间分布特征,并利用Mann-Kendall趋势检验方法对干旱强度及干旱覆盖范围进行检验。结果表明:春季干旱发生频率位于30.95%~42.86%之间,整体上呈现北高南低及临海城市相对较低的分布趋势。夏旱频率略高于春旱频率位于30.95%~45.23%之间,但没有明显的地域分布特征。秋旱发生频率位于28.57%~45.28%之间,冬旱频率位于14.28%~30.95%之间,秋冬两季均体现沿海城市旱情略高于其他城市;春旱、夏旱及秋旱的覆盖范围有增强的趋势,而冬旱覆盖范围则有降低的趋势;强度分析表明,春旱及秋旱的强度均有增加趋势,而夏旱及冬旱强度则有下降趋势。
英文摘要	High frequency of droughts in semiarid region of northwest Liaoning has limited the economic growth and living standard. In order to investigate the characteristics and occuring regularity of droughts in the region, Standardized Precipitation Index (SPI) was employed to study the frequency, intensity, covering scope, spatial and temporal features of droughts happened in the area, non-parameter Mann-Kendall test method was also used to analyze the trend of intensity and covering scope of the drought. The spring drought occurring frequency ranged from 30.95% to 42.86%. Generally speaking, a gradual declining tendency was shown from north to south in the survey region, and the drought probability in the coastal regions was comparatively lower. The drought frequency in summer was 30.95% -45.23%, lower than in spring, and there was unobvious characteristics in regional distribution. Autumn and winter drought frequency range was 28.57% -45.28% and 14.28% -30.95% respectively, meanwhile drought in coastal regions was severe to some extent compared to others. The covering scope of the drought in spring, summer and autumn showed an upward tendency, and the reverse in winter. Drought intensity showed that an increasing tendency for intensity in spring and autumn, while a decreasing tendency in summer and winter.
中文关键词	干旱 ; 标准化降水指数SPI ; 时空演变 ; 辽西北半干旱区
英文关键词	drought Standardized Precipitation Index spatial-temporal evolution semiarid region of northwest Liaoning
类型	Article
语种	中文
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:5457286
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/378855
作者单位	薛文, 辽宁省清河水库管理局, 铁岭, 辽宁 112003, 中国.; 刘娟, 辽宁石油化工大学石油天然气工程学院, 抚顺, 辽宁 113001, 中国.; 迟道才, 沈阳农业大学水利学院, 沈阳, 辽宁 110161, 中国.
推荐引用方式 GB/T 7714	薛文,刘娟,迟道才. 辽西北半干旱地区旱灾时空演变特征分析[J],2015,46(3):379-384.
APA	薛文,刘娟,&迟道才.(2015).辽西北半干旱地区旱灾时空演变特征分析.沈阳农业大学学报,46(3),379-384.
MLA	薛文,et al."辽西北半干旱地区旱灾时空演变特征分析".沈阳农业大学学报 46.3(2015):379-384.