广西降雨量时空变异规律  

Temporal and Spatial Variation of Precipitation in Guangxi Province

作　　者：代俊峰[1] 王娜[1] 杜君[2] 韩培丽[1] 关保多[1] 

机构地区：[1]桂林理工大学环境科学与工程学院,广西桂林541004 [2]河南省农业科学院园艺研究所,河南郑州450002

出　　处：《水电能源科学》2013年第6期6-9,共4页Water Resources and Power

基　　金：国家自然科学基金资助项目(51009031;51268008);水资源与水电工程科学国家重点实验室开放基金资助项目(2010B069)

摘　　要：为揭示广西不同地区降雨量的时空变化规律,利用17个气象站点1957～2001年的降雨资料,通过年际极值比、变差系数、累积滤波器、Kendall秩次相关法、Mann-Kendall非参数统计法,分析了广西单个站点和区域降雨量的年际变化特征、变化趋势及其突变点。结果表明,桂南降雨量年际变化最剧烈,桂北年际变化最小;非岩溶发育地区降雨量的年际变化比岩溶发育地区剧烈;17个单站点中,64.7%的降雨量呈上升趋势,35.3%呈下降趋势;桂北、桂南和桂西的降雨量主要呈增加趋势,桂中和桂东的降雨量主要呈下降趋势。The temporal and spatial variation of rainfall is investigated on the basis of the precipitation data at 17 metrological stations in Guangxi Province during 1957-2001.The inter-annual change characteristics of precipitation,change trend and sudden change point are analyzed by using the coefficient of variation,extremum ratio,cumulative filter method,Kendall rank test method and Mann-Kendall non-parameter statistics method.The results show that the annual precipitation was subject to dramatic change in Southern Guangxi and minimal change in Northern Guangxi;there were much dramatic changes of precipitation in no-karst area than that of karst area;64.7 percent precipitation in 17 metrological stations appeared upward trend and others appeared downward trend;the precipitation in Northern Guangxi,Southern Guangxi and Western Guangxi mainly appeared upward trend;the precipitation in Central Guangxi and Eastern Guangxi appeared downward trend.

关 键 词：降雨量 年际变化 变化趋势 突变点 

分 类 号：TV125[水利工程—水文学及水资源]