3种旱涝指标在郑州市干旱分析中的对比研究  

Three Kinds of Drought Index in the Comparative Analysis of Zhengzhou City

作　　者：张成才[1] 周勇[1] 

机构地区：[1]郑州大学水利与环境学院,河南郑州450001

出　　处：《安徽农业科学》2011年第4期2005-2006,2024,共3页Journal of Anhui Agricultural Sciences

基　　金：河南省科技创新人才计划项目(10410050003);河南省教育厅自然科学研究计划项目(2009A610014)

摘　　要：利用郑州气象站50年（1959-2008）的月降水资料和气温资料,分别计算标准化降水指数（SPI）、Z指数和综合气象干旱指数（CI）,并对这3种旱涝指标的计算结果进行对比分析。结果表明,SPI指数具有优越的计算稳定性,但由于没有考虑水分的支出,则易夸大旱涝的等级;Z指数与降水的时空分布有关,参考的划分界限不适合郑州的实情;CI指数考虑了最近的降水情况,同时考虑了水分的收支情况,能够较好的表征郑州市的旱涝情况,最后选定CI指数作为郑州地区旱涝等级划分的指标。By dint of monthly precipitation and temperature data in Zhengzhou Meteorological Station in 50 years（1959-2008）,the Standardized Precipitation Index（SPI）,Z Index and comprehensive meteorological drought index（CI） are calculated,and the calculated results of the three kinds of drought index are compared and analyzed.The results showthat： SPI index has excellent stability of computation.However,it does not consider the expenditure of water so that it＇s easy to exaggerate the level of drought;Z index of spatial and temporal distribution of precipitation is related and the delineation of boundaries is not fit with the facts of Zhengzhou;CI index takes both recent rainfall situation and the water balance into account,and could better characterize droughts and floods in Zhengzhou City.Finally,the complex climatology drought index（CI） as drought and flood levels in Zhengzhou is selected.

关 键 词：旱涝指标 郑州 对比分析 

分 类 号：S423[农业科学—植物保护]