气象干旱综合监测指数适用性分析——以青海省东部农业区为例  

Applicability Analysis of Comprehensive Monitoring Index of Meteorological Drought in Eastern Agricultural Region of Qinghai Province

作　　者：魏杰[1] 张鑫[1] 

机构地区：[1]西北农林科技大学水利与建筑工程学院,陕西杨凌712100

出　　处：《中国农村水利水电》2016年第6期81-85,89,共6页China Rural Water and Hydropower

基　　金：国家高新技术研究发展计划("863"计划)项目(14110209);国家科技支撑计划项目(2011BAD29B01);中央高校基本科研业务费科研创新重点项目(Z109021202)

摘　　要：通过对比气象干旱综合监测指数MCI与综合气象干旱指数CI在各等级干旱统计结果、干旱过程描述能力、干旱空间分布特征、干旱年际变化以及与实际干旱情况对比的差异,分析了MCI在青海省东部农业区的适用性。研究结果表明:MCI与CI各等级干旱月数与干旱频率的监测结果基本一致,但是MCI重旱与特旱的干旱月数稍多、干旱频率也略高;在描述干旱过程时,MCI在干旱发生阶段不合理跳跃次数相比CI大为减少;MCI与CI在干旱频率与干旱强度的空间分布特征上无显著差异,而MCI发生干旱频率略高;在干旱年际变化上,MCI较CI干旱持续时间略长,干旱强度偏重;在实际发生干旱时,MCI与CI定义的干旱等级除个别站点干旱等级略有差异外,总体上一致性较好,都比较符合实际干旱情况。The applicability of MCI in the eastern agricultural areas of Qinghai Province is analyzed by comparing the statistics of each level drought,the differences of the comprehensive monitoring of meteorological drought index（MCI ）and the integrated meteorological drought index（CI）in the description ability of drought course,the spatial distribution characteristics and the inter-annual variability,comparison of the difference between the actual drought situation.The results show that the MCI are consistent with the results of CIin all levels of drought months and frequency of drought monitoring,the severe drought results of MCI are slightly heavier than the CI.The MCI are consistent with the results of CIin describing the drought course,but the unreasonable jumping times at drought stage by MCI is lower than CI.There is no significant difference between MCI and CIin spatial distribution of drought frequency and intensity of drought,but the MCI drought frequency is slightly higher than CI.Compared with the CI,the drought duration is slightly longer.When drought actually occurred,the definition of drought grade by MCI and CIare basically identical,and they accord with the actual drought situation.

关 键 词：气象干旱综合监测指数 综合气象干旱指数 对比 适用性 

分 类 号：S423[农业科学—植物保护] TV125[水利工程—水文学及水资源]