摘要
利用1901-2010年的资料,采用传统统计方法以及新引入的衡量年内分布情况的集中度、集中指数,对比分析了新疆极端水文事件的年内分布特征。分析发现,传统统计方法和集中度、集中指数得出的年内分布具有很好的一致性,是一种可靠的分析方法,今后可以借鉴使用。结果表明:新疆极端水文事件年内分布极不均匀,夏半年和夏季的集中指数较大,而冬半年和冬季的集中指数较小,即大部分地区极端水文事件主要发生在夏半年,冬半年发生相对较少,但北疆的阿勒泰地区冬半年极端水文事件较多;吐鲁番的极端水文事件年内分布非常集中,乌鲁木齐、奎屯—石河子、阿克苏地区次之,阿勒泰地区集中度最小。
According to data of extreme hydrological events from 1901 to 2010,annual distribution characteristics of the events in Xinjiang are comparatively analyzed by using traditional statistic analysis methods and newly-introduced concentration degree as well as concentration index for measurement of annual distribution situations,which get consistent annual distribution results and are proved to be a reliable and valuable one.Annual distribution of extreme hydrological events in Xinjiang is quite heterogeneous.The concentration index in summer-half-year and summer is relatively big and that in winter-half-year is smaller,which indicate that extreme hydrological events happen mostly in summer half year,and relatively less in winter for most regions,and more in winter in Altay of north Xinjiang.Annual distribution of extreme hydrological events in Turpan is very concentrated,and the concentration degrees in Urumqi,Kuytun-Shihezi and Aksu are the second and that in Altay is the smallest.
出处
《灾害学》
CSCD
2011年第2期18-23,共6页
Journal of Catastrophology
基金
国家重点基础研究发展计划“九七三”计划(2010CB951003)
国家自然科学基金(40871239)
关键词
极端水文事件
年内分布
非均匀性
新疆
extreme hydrological event
annual distribution
heterogeneity
Xinjiang
