摘要
为了进一步探讨降水及洪涝灾害发生规律,合理开发利用本溪山区水资源,利用本溪草河口气象站1953—2012年逐日降水资料,分析了本溪山区6个极端降水指数的变化趋势。结果表明:本溪山区年降水量年际差异较大,年降水量无显著的变化趋势;四季降水量也无明显的变化趋势。年降水日数呈明显的减少趋势,从1974年本溪山区降水日数开始减少;除春季降水日数变化趋势不明显外,其他各季均呈显著的减少趋势变化;夏季在1976年,秋季在1987年发生突变。降水强度无明显的变化趋势;最大5日降水量趋势变化不明显,但年际间差异较大;年极端降水事件无显著的变化趋势,20世纪50、60、80年代为偏多时期。
In order to further explore the occurrence regularity of precipitation and flood disaster, develop andutilize the water resources in Benxi Mountainous area, according to daily precipitation data of Caohekoumeteorological station in Benxi from 1953 to 2012, 6 extreme precipitation indexes were analyzed. The resultsshowed that the annual precipitation had significant inter- annual fluctuations, but without significanttendencies, the seasonal precipitation had no obvious change tendency. The annual precipitation days haddisplayed a decreasing trend since 1974, except the spring precipitation days which had no obvious variationtrend, other seasons showed a significant decreasing tendency. The mutation occurred in the summer of 1976 and in the autumn of 1987. Rainfall intensity had no obvious variation trend, the variation of the maximumrainfall of consecutives 5 days was not obvious, but inter- annual difference was significant. The annualextreme precipitation events showed no significant variation trend, periods of more precipitation were 50 s, 60 sand 80s of the 20 thcentury.
出处
《中国农学通报》
2015年第8期169-173,共5页
Chinese Agricultural Science Bulletin
基金
本溪市气象局"本溪市水资源开发利用研究"(BQ2013001)
关键词
极端降水指数
气候变化
本溪山区
extreme precipitation index
climate change
Benxi Mountainous area
