中文摘要：

长江上游地区的发展效益和质量直接关系到长江经济带的发展效益和质量。本文基于主成分分析方法和探索性空间分析技术（ESDA），分析了长江上游南岸地区最大支流——乌江流域的53个县域单元2005—2015年经济发展的空间格局演变和空间自相关性。结果表明：（1）乌江流域县域经济呈“S”形分布格局，即存在以涪陵区、遵义市一贵阳市、钟山区为中心的三大增长极；（2）Moran’S I指数从3．038增长到4．526，表明乌江流域县域经济的正向空间集聚现象越来越显著；（3）LISA图、Geis—Ord Gi^＊分析表明，乌江流域发达区县带动周边区县出现“片状”均衡化发展，落后地区亦出现“圈层”扩散现象，并有继续落后的趋势；（4）经济发展基础、地理区位条件、空间临近效应等是导致乌江流域县域经济时空差异形成的主要原因。

英文摘要：

The development benefit and quality of the upper reaches of the Yangtze River are directly related to those of the Yangtze River Economic Belt. Based on the method of Principal Component Analysis and Exploratory Spatial Data Analysis （ ESDA）, this paper analyzes the spatial pattern evolution and spatial Autocorrelation of economic development of 53 counties in Wujiang River Basin from 2005 to 2015. The results show that： （ 1 ） The distribution pattern of county economy in Wujiang River Basin is ＂ S＂ type, there are three growth poles centered on Fuling, Zunyi - Guiyang and Zhongshan; （2）Moran＇s I increased from 3. 038 to 4. 275, indicating thattbe positive spatial clustering phenomenon of economy in Wujiang River Basin is more and more significant;（ 3 ）LISA ,Geis -Ord Gi, and Hot Spot Analysis indicate developed counties and their neighbors led to a ＂flaky＂ balanced development, but backward areas also appeared in a ＂circle＂ phenomenon of proliferation, and there are still backward trend; （4）Economic foundation, geographical location and spatial proximity effect are the main reasons leading to the formation of spatial differences in county economy in Wu- jiang River Basin.