基于LMDI法的宁夏水资源生态足迹影响因素分析

Analysis of Factors Affecting Water Resources Ecological Footprint of Ningxia Based on LMDI Method

在构建水资源生态足迹模型的基础上,应用LMDI模型对宁夏水资源生态足迹进行了影响因素分析。结果表明:研究期内宁夏总水资源生态足迹呈减小的趋势,就各个用水账户来看,引起总水资源生态足迹减小的主要原因是农业水资源生态足迹的减小;研究期内万元GDP水资源生态足迹稳步下降,说明水资源的利用效率持续增高;近年来宁夏水资源呈现生态赤字,但赤字明显减小,说明宁夏水资源利用模式正在向利于可持续发展的方向发展。分解宁夏水资源生态足迹因素可知,结构效应、经济效应与人口效应为正值,对宁夏水资源生态足迹增长起促进作用;技术效应为负值,对宁夏水资源生态足迹增长起抑制作用。

Based on the construction of water resources ecological footprint model,this paper applies LMDI model to decompose the influencing factors of Ningxia water resources ecological footprint.The results show that the ecological footprint of Ningxia's total water resources has a decreasing trend during the study period.As far as the water accounts are concerned,the main reason for the reduction of the overall water resources ecological footprint is the reduction of the ecological footprint of agricultural water resources.The ecological footprint of water resources in Yuan GDP has steadily declined,indicating that the utilization efficiency of water resources has continued to increase.In recent years,the water resources in Ningxia have shown an ecological deficit,but the deficit has decreased significantly,indicating that the water use model in Ningxia is developing in a direction that is conducive to sustainable development.According to the factor decomposition of Ningxia's water resources ecological footprint,the structural effect,economic effect and population effect are positive,which promotes the growth of water resources ecological footprint in Ningxia;the technical effect is negative,which inhibits the growth of Ningxia's water resources ecological footprint.