烟台市近50年来旱涝指标的确定及时间分布特征  

Determination of Drought and Water-logging Index in the Latest 50 Years in Yantai and its Temporal Distribution Dharacteristics

作　　者：孙祝友[1] 杜国云[1] 刘德林[1] 刘俊菊[1] 

机构地区：[1]鲁东大学地理与资源管理学院,山东烟台264025

出　　处：《中国农村水利水电》2007年第4期32-34,共3页China Rural Water and Hydropower

基　　金：山东省自然科学基金重大研究项目(Z2003E01);鲁东大学校基金项目(20053202)

摘　　要：利用改进后的Z指标方法对1956-2002年以来的降水数据进行了旱涝等级评估。结果表明：烟台市近50年来，极旱年份为1986、1999、2000年，极涝年份为1964、1990年。总的旱涝趋势是越来越旱，1980年以前偏涝，间或有旱的年份出现；1980年以后偏旱，间或有涝的年份出现；Z指标能较好地揭示烟台市的旱涝灾害时间分布特征。The drought-flood grades are assessed using a modified Z-index method against the data of precipitation of Yantai Meteorological Bureau from 1956 to 2002 in this paper. It is showed that the extremely severe drought in happened in 1986, 1999 and 2000, and the extreme severe water-logglng happened in 1964 and 1990 in the reeent 50 years; there is a more and more drought trend, it is to say that in general, water-logging was frequent before 1980 exeept in few years; while after 1980, it appeared contrary. The modified Z-index is a better approaeh to refleet the temporal distribution of drought-flood in Yantai.

关 键 词：烟台市 Z指标 旱涝灾害 时间分布 

分 类 号：TV212.53[水利工程—水文学及水资源]