四种干旱指数在河北山前平原的对比分析  

Comparison of Drought Index of Six Stations in Shijin Irrigation District

作　　者：石超强 Shi Chaoqiang(Lvliang City Hydrology and Water Resources Survey Station,Shanxi Lvliang 033000)

机构地区：[1]吕梁市水文水资源勘测站,山西吕梁033000

出　　处：《山西水土保持科技》2021年第3期7-11,共5页Soil and Water Conservation Science and Technology in Shanxi

摘　　要：选取河北山前平原6个气象站1955-2017年的逐日气温、气压、降水等气象资料,分别计算Pa、SPI、Z指数、MI四种干旱指数,并对四个干旱指数的适用性进行了对比分析,得出了以下结论:SPI指数更能客观反映历史干旱情况,综合评价结果是SPI>降水Z指数>MI指数。This paper selects the daily temperature,pressure,precipitation and other meteorological data of 6 meteorological stations in the piedmont plain of Hebei Province from 1955 to 2017,and calculates the four drought indices of Pa,SPI,Z index,and MI respectively,and calculates the four drought indices.The applicability is compared and analyzed,and the following conclusions are drawn:The SPI index can objectively reflect the historical drought situation,and the evaluation result is the best among the three drought index evaluations.Among them,SPI>precipitation Z index>MI index basically reflects this Drought conditions in the region.

关 键 词：降水距平百分率 标准化降水指数 降水Z指数 相对湿润度指数MI 山前平原 

分 类 号：P426.616[天文地球—大气科学及气象学]