基于三维水生态足迹和脱钩模型的贵阳市水资源可持续性评价OA

In order to evaluate the sustainability of water resources in Guiyang City,the three-dimensional water Ecological Footprint model was used to analyze the bearing state of water resources from 2003 to 2023,and the bearing capacity of water resources rigid constraint index was comprehensively evaluated.Then,the decoupling relationship between water Ecological Footprint and GDP,primary industry and secondary industry was analyzed by Tapio decoupling model.Finally,the decoupling catch-up model was constructed to simulate whether the water use efficiency is healthy when the city catches up with the model area from 2014 to 2023.Results show:From 2003 to 2023,the water ecological footprint of the city as a whole,per capita and thousand Yuan GDP all decreased.The per capita water ecological carrying capacity was greater than the per capita water ecological footprint,and the sustainable utilization index of water resources was greater than 0.5(sustainable).However,from 2014 to 2023,there were different degrees of water ecological deficit in Yunyan,Nanming,Guanshanhu and other districts of the county-level administrative region.The total water use control index margin of the whole city and each county(district)fluctuated and decreased.Yunyan and Kaiyang even exceeded the total water use index.The decoupling frequency of total water Ecological Footprint and GDP is the highest(95%),followed by industrial water and secondary industry(90%),and agricultural water and primary industry(75%).By simulating the city's catch-up to the economically developed areas in 2014-2023,the overall decoupling rate is 90%.Therefore,the overall water resources utilization efficiency of Guiyang City is gradually improved,which is sustainable;However,when it comes to county-level administrative regions,some counties(districts)have experienced water ecological deficits and exceeded total water consumption quotas,which are unsustainable.For'main urban area,Kaiyang county',it is necessary to more strictly implement the rigid constraints of water resources,strictly control the approval of new water intake projects,continuously optimize the industrial structure and economic and social layout,improve the utilization rate of unconventional water,and accelerate the construction of water diversion and water network connectivity projects to ensure the sustainable use of water resources.The overall water use situation of Guiyang City has a good decoupling relationship with economic development.When it catches up with the model area,it can basically achieve a'win-win'between economic growth and water use efficiency improvement.However,the decoupling relationship between agricultural water use and primary production is general and unstable,and it is necessary to strengthen the construction and transformation of agricultural water-saving projects.