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水足迹强度是一个反映水的利用效率的指标,论文在对1995—2009年中国31个省(市、区)水足迹计算的基础上(因资料所限,未考虑香港、澳门和台湾地区),利用探索性空间数据分析(ESDA)对15 a来各地区水足迹强度空间分布格局以及演变态势进行了分析和探讨。结果表明:①中国水足迹强度整体呈现明显的下降趋势,说明水资源的利用效率明显提高,但是区域发展并不平衡;②从全局空间分异来看,中国各地区水足迹强度呈现出正的空间相关性特征,存在着空间集聚特征,即水足迹强度高的地区相互邻接,强度低的地区相互邻接;③从局部空间分异来看,空间正相关模式(LL集聚和HH集聚)所占比例很大,且在研究年份内逐渐增加,反映出水足迹强度的LL集聚和HH集聚变得越来越显著。LL集聚主要分布在东部沿海一带,在空间上有明显的向周边扩散的趋势;HH集聚主要分布在西部地区,在空间分布上较稳定。
Water footprint intensity is an indicator of water use efficiency. Based on the calculation of water footprint of 31 provinces (cities and districts) in China from 1995 to 2009 (due to limited data, Hong Kong, Macau and Taiwan are not considered) , Exploratory spatial data analysis (ESDA) was used to analyze and discuss the spatial distribution pattern and evolution trend of water footprint intensity in different regions in the past 15 years. The results showed that: ① China’s water footprint overall showed a significant downward trend, indicating that the utilization efficiency of water resources increased significantly, but the regional development was not balanced; ② From the point of view of global spatial differentiation, the water footprint intensity in all regions of China showed a positive There are spatial clustering characteristics, that is, the areas with high water footprint strength are adjacent to each other and the areas with low intensity are adjacent to each other. (3) From the perspective of local spatial differentiation, the positive spatial correlation patterns (LL and HH) The proportions were large and gradually increased during the study year, reflecting the fact that LL aggregates and HH aggregates of water footprint intensities are becoming more pronounced. LL agglomeration is mainly distributed in the eastern coastal area, and there is a clear tendency of spatial diffusion to the periphery. HH agglomeration is mainly distributed in the western region, and is more stable in spatial distribution.