水-能纽带关系下中国省际煤炭水足迹空间转移特征分析

Spatial Transfer Characteristics of Inter-provincial Coal Water Footprint in China under Water-energy Nexus

能源水足迹常用于表征能源在生产过程中对区域水资源的真实消耗情况,采用自下而上的方法对2015—2019年中国各省(市、区)的煤炭水足迹的时空变化特征进行分析,在此基础上探讨了中国省际煤炭水足迹的空间转移网络特征。结果表明:研究时段内中国煤炭水足迹呈波动上升态势,其中蓝水足迹、灰水足迹平均分别占水足迹总量的21.56%、78.44%,空间上,煤炭水足迹高值区主要分布在黄河流域的陕西、山西与内蒙古,其空间分布格局与煤炭生产总量的空间分布相对一致;煤炭水足迹空间转移方面,山西、陕西和内蒙古是最大的煤炭水足迹输出地,其中山西煤炭水足迹主要流向河北、山东,内蒙古煤炭水足迹主要流向东北、山东及江苏,而陕西省煤炭水足迹则流向周边省份;研究期内,河北、山东及东南沿海地区为主要的煤炭水足迹输入地。

The energy water footprint is often used to represent the real consumption of regional water resources in the production process of energy.This paper adopts a bottom-up approach to analyze the temporal and spatial changes in the water footprint of coal in each province or municipality or district of China from 2015 to 2019.On this basis,the spatial transfer network characteristics of inter-provincial coal water footprints in China are explored.The results are as follows.During the study period,the water footprint of China′s coal showed a fluctuating upward trend,with the blue water footprint and gray water footprint accounting for 21.56%and 78.44%of the total water footprint on average,respectively.Spatially,the regions with high coal water footprint are mainly distributed in Shaanxi,Shanxi and Inner Mongolia in the Yellow River Basin,and their spatial distribution pattern is relatively consistent with the spatial distribution of total coal production.In terms of spatial transfer of coal water footprint,Shanxi,Shaanxi and Inner Mongolia are the largest exporters of coal water footprint.Among them,the coal water footprint of Shanxi mainly flows to Hebei and Shandong,the coal water footprint of Inner Mongolia mainly flows to northeast China,Shandong and Jiangsu,and the coal water footprint of Shaanxi province flows to the surrounding provinces.During the study period,Hebei,Shandong and the southeastern coastal region were the major coal water footprint inputs,while Shanxi,Shaanxi and Inner Mongolia were the regions with large net outflow of coal water footprint.