基于SPI指数和CI指数的东北地区降水集中度与旱涝关系研究

张琪 张芯瑜 柳艺博

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中国农村水利水电 ›› 2019 ›› (11) : 151-154.
防汛与抗旱

基于SPI指数和CI指数的东北地区降水集中度与旱涝关系研究

  • 张 琪1,2 ,张芯瑜1 ,柳艺博1
作者信息 +

The effects of precipitation concentration on drought/flood events in Northeast China based on CI and SPI

  • ZHANG Qi 1,2 ,ZHANG Xin-yu1 ,LIU Yi-bo1 
Author information +
稿件信息 +

摘要

研究以东北地区43个气象站1976-2015年逐日降水量数据为基础,采用降水集中度指数CI(Concentration Index)描述降水集中程度,标准化降水量指数(SPI)描述旱涝状况,以分析全年以及不同季节的降水集中度与旱涝关系为目标开展研究。结果表明:1)东北地区年降水集中度高于各个季节的降水集中度,四季中冬季降水集中度最低;2)在丘陵山地地区年CI指数与年尺度SPI正相关关系显著,降水多的年份降水分布也更为集中,更容易造成洪涝灾害;3)不同季节之间,春、秋季有超过半数的站点的降水集中度与SPI正相关关系显著,春季在降水少的年份由于降水分布均匀,无效降水多,加剧了干旱。研究结果对于深入理解东北地区不同季节降水分布特征及对旱涝事件影响具有重要意义

Abstract

Daily precipitation data during 1976-2015 at 43 meteorological stations located in northeast China were used to calculation yearly and seasonal precipitation CI (Concentration Index) and SPI (Standardize Precipitation Index). This study aimed to analyze the relationship between precipitation concentration character and drought-flood events in different seasons. Results shown that yearly precipitation CI was higher than seasonal CI. CI for winter was the lowest among the four seasons. There were significant positive correlation between yearly CI and SPI at the stations located in hilly areas. This means in those areas precipitation distributed more concentration in wetting years. Seasonal CI and SPI were significantly correlated for over half stations in spring and autumn. But the relationship were not obvious in summer and winter. Those results were meaning for better understanding the precipitation distribution characters during different seasons and it’s impacts on drought and flood in northeast China.

关键词

降水集中度 / 东北地区 / 旱涝 / 不同季节

Key words

precipitation concentration / Northeast China / drought and flood / different seasons

基金

国家自然科学基金项目( 41501553; 41571491) ; 公益性 行业( 气象) 科研专项储备项目( 2015001) 。

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张琪 张芯瑜 柳艺博. 基于SPI指数和CI指数的东北地区降水集中度与旱涝关系研究[J].中国农村水利水电, 2019(11): 151-154
ZHANG Qi, ZHANG Xin-yu, LIU Yi-bo. The effects of precipitation concentration on drought/flood events in Northeast China based on CI and SPI[J].China Rural Water and Hydropower, 2019(11): 151-154

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