近60a来淮河流域干旱变化特征  

Drought Variations of Huaihe River Basin in Recent 60 Years

作　　者：王岽[1,2] 徐京京[1,3,2] 周亮广[1,2] 张延兵[3,2] 吴见[1,2] 

机构地区：[1]滁州学院地理信息与旅游学院,安徽滁州239000 [2]安徽省地理信息集成应用协同创新中心,安徽滁州239000 [3]华中师范大学城市与环境科学学院,湖北武汉430079

出　　处：《水土保持通报》2015年第3期338-343,共6页Bulletin of Soil and Water Conservation

基　　金：滁州学院校级科研启动资助项目"江淮分水岭地区植被盖度遥感信息提取技术研究"(2012qd18);安徽高等学校省级自然科学研究项目"安徽省生态环境质量定量评价遥感信息模型研究"(KJ2013B189)

摘　　要：[目的]研究淮河流域近60年来干旱的变化特征,为以后防旱抗灾提供一定的参考。[方法]利用WAP（weight average of precipitation）指数法、空间Kriging法、小波分析等方法对淮河流域干旱变化时空特征进行分析。[结果]春季WAP指数在21世纪初下降幅度较大,易发生春旱,冬季WAP指数在1980年以后明显增加,冬旱有所减轻;年均WAP指数表征的干旱存在2-3a的主周期和6-7a的次主周期;在空间上,WAP指数大致由东南向西北递减,干旱程度由东南向西北逐渐增大。[结论]WAP指数能够很好地表征淮河流域干旱发生的时间和空间特征。[Objective]To analyze the drought variation characteristics of the Huaihe River basin in recent 60 years,and provide a reference for the later drought-resisting disaster.[Methods]The weight average of precipitation（WAP）index,space Kriging method,and wavelet analysis methods were used to study the drought variation of the Huaihe River basin.[Results]The spring WAP index declined greatly in the early 21 st century,it is prone to drought in spring.Meanwhile the winter WAP index increased significantly after 1980 and the winter drought has reduced,and the average index of WAP representation the main cycle of drought was 2-3years and secondary was 6-7years.Furthermore,the WAP index of Huaihe river basin showed a progressive decrease from the southeast to the northwest while the degree of drought increases from the southeast to the northwest as a whole in space.[Conclusion]The WAP index can represent time and space characteristics of drought in the Huaihe River basin.

关 键 词：干旱 时空变化特征 WAP指数 淮河流域 

分 类 号：P426.616[天文地球—大气科学及气象学]