Research on the spatio-temporal evolution of water resources ecological footprint and sustainable utilization in Guizhou Province
Based on the theoretical model of water resources ecological footprint and ecological carrying capacity,this paper measured the spatial-temporal changes of water resources ecological footprint,ecological carrying capacity and ecological surplus in Guizhou Province from 2010 to 2021,and analyzed the spatial differences of water resources ecological footprint by using Theil index.Finally,a comprehensive evaluation index system of sustainable water resources utilization was constructed based on the pressure-state-response(PSR)model.The results showed that:1)Both the ecological footprint and the ecological carrying capacity of water resources per capita in Guizhou Province showed a fluctuation upward trend;the ecological carrying capacity of water resources was greater than the ecological footprint,which made the water resources of Guizhou Province always maintain ecological surplus,and the overall trend rising;ecological footprint water consumption mainly came from production and domestic water,especially production water.2)The Theil index of water resources ecological footprint in Guizhou Province was increasing,while the per capita ecological footprint Theil index was decreasing.The Theil indices of water resources ecological carrying capacity,per capita ecological carrying capacity,water resources ecological surplus,and per capita ecological surplus were all experiencing oscillating increases.Regional differences in water resources ecological footprint were obvious,with the largest differences observed in the central region,followed by the western region,and the smallest in the eastern region.Special attention should be paid to water resources use in central Guizhou and western Guizhou.3)The pressure index,state index and response index of the comprehensive evaluation index system of sustainable water resources utilization showed a downward,upward and upward trend respectively,indicating that the state was continuously improved,the measures were effective and the pressure was continuously alleviated.Therefore,the comprehensive evaluation index of sustainable water resources utilization had been continuously improved.The above research showed that the sustainable utilization of water resources in Guizhou Province had been improved in recent years,but the spatial-temporal differences were obvious and the regional distribution was uneven.It was still necessary to focus on improving water efficiency of production and domestic water accounts,continuously optimizing the industrial structure,and improving the sustainable utilization level of water resources.
water resources ecological footprintspatio-temporal evolutionsustainable utilization
万方数据
维普
