辽宁省水资源生态足迹时空特征及其影响因素分析

基于水资源生态足迹模型,结合水资源生态承载力和生态盈亏指数,讨论了辽宁省人均水资源生态足迹的时空特征,并采用 LMDI模型对辽宁省2010—2019年水资源生态足迹变化的影响因素进行分析。结果表明:①辽宁省人均水资源生态足迹在时间变化上较稳定,各用水账户占比大小依次为农业、工业、生活和生态环境用水;在空间分布上呈现出较大差异,仅丹东市、铁岭市、鞍山市、本溪市和葫芦岛市为生态盈余状态,其他行政区均出现不同程度的生态赤字,盘锦市最为严重,水资源生态状况也较差;②在辽宁省及各行政区人均水资源生态足迹的构成上,除本溪市为工业用水占比最高以外,辽宁省与其他各市都以农业用水为主,其次为工业用水,生活用水和生态环境用水占比较低但均有小幅提升;③通过因素分解得出经济因素是推进水资源生态足迹增长的主导因素,结构因素和人口因素对生态足迹变化的影响比较小,技术因素有效抑制了水资源生态足迹的快速增长。

Spatio-temporal Characteristics and Influencing Factors of Water Resources Ecological Footprint in Liaoning Province

The spatial and temporal characteristics of the per capita water resources ecological footprint in Liaoning Province were investigated via water resources ecological footprint model in consideration of the water resources ecological carrying capacity and the ecological profit and loss index.The influencing factors of the water resources ecological footprint in Liaoning Province from 2010 to 2019 were also explored by using LMDI (Logarithmic Mean Divisia Index) model.Results reveal that:1) The per capita ecological footprint of water resources in Liaoning Province is stable in temporal scale but differed remarkably in spatial scale.Agricultural water use accounted for the largest proportion, followed by industrial water use, domestic water use and eco-environmental water in sequence.The cities of Dandong, Tieling, Anshan, Benxi, and Huludao were in ecological surplus while other administrative regions were in ecological deficit to different degrees, among which the city of Panjin suffered from the most severe ecological deficit and inferior ecological situation.2) Except from the city of Benxi which has the highest proportion of industrial water use, the whole of Liaoning Province and its administrative regions are dominated by agricultural water use, followed by industrial water use;the proportions of domestic water use and eco-environmental water use are relatively low but both have increased slightly.3) Factor decomposition suggest that economic factor is the leading factor contributing to the growth of water resources ecological footprint, while structural factor and population factor have slight influence on the change of the ecological footprint, and on the contrary, technical factor restrains the rapid growth of the ecological footprint of water resources in Liaoning Province.