Spatio-temporal Pattern And Driving Factors Of Ecological Footprint Of Water Resources In Henan Province

Water is a strategic resource for social development.With the development of society and the increase of population,the demand for water resources has increased dramatically,and most provinces in China are facing the problem of water shortage.Henan Province,as a large agricultural and population province,has a large demand for water resources and an outstanding contradiction between supply and demand.Therefore,it is important to clarify the real occupation status of water resources and promote the coordinated development of water resources utilization and economy to ensure the high-quality development of Henan Province.Based on the water resources data of Henan Province and18 municipalities under the jurisdiction of Henan Province from 2005 to 2020,this thesis analyzes the spatial and temporal distribution characteristics of water resources ecological footprint,ecological carrying capacity and water resources ecological pressure in Henan Province by using the water resources ecological footprint model,and analyzes the water resources ecological footprint breadth,depth and pressure in Henan Province with the help of ESTDA model.The study also analyzes the temporal path and spatial and temporal leap dynamics of water ecological footprint,constructs the LMDI factor model of water ecological footprint,and explores the driving factors of water resources utilization in order to provide theoretical reference for the green development of water ecological environment and the construction of harmonious water use environment in Henan Province.The main research findings are as follows:（1）In terms of time distribution,during the study period,the ecological footprint of water resources,water quality ecological footprint and water quantity ecological footprint of Henan Province showed an overall fluctuation and upward trend.The ecological footprint of water in agriculture,industry,urban and rural life and ecological environment showed a fluctuating trend,with the average proportions of 55%,22%and 23%over the years,and the proportion of agricultural water consumption was significant.During the study period,the ecological carrying capacity of water resources showed a fluctuating downward trend and was greatly affected by annual precipitation.The ecological footprint was in deficit,and the water resources sustainability index was less than 0.5,which was in an unsustainable state of use.In terms of spatial distribution,the per capita water resources ecological footprint was high in the north and low in the south,the per capita ecological carrying capacity of water resources was low in the north and high in the south,except for the ecological surplus in the southern Henan region,other cities in the province were ecological deficits during the study period,especially in the provincial capital Zhengzhou.The water ecological footprint in southern and eastern Henan was large,and the western part of Henan was small.（2）The LISA time path and spatio-temporal leap dynamics study found that the distributions of water resources ecological footprint breadth,depth and water resources ecological pressure index relative to length overlap.The water resources ecological footprint breadth,depth and pressure curvature are all greater than 1,and there is a strong spatial dependence.The average curvature of the temporal paths of the water resources ecological footprint breadth,depth and water resources ecological pressure in Henan Province increases sequentially,indicating that the fluctuation of the local spatial structure in the direction of spatial dependence increases.The breadth,depth and pressure have no obvious spatio-temporal leap during the study period and belong to Type₀ type leap,and the Moran scattering points are always located in the same quadrant with spatial aggregation and high stability.（3）During the study period,the economic effect on the growth of water ecological footprint was obvious,the technical effect played a suppressive role,and the structural effect and population effect played a role in promoting the growth of water footprint.