Spatio-temporal Evolution of Grey Water Footprint and Its Influencing Factors in the Tuhai River Basin
To effectively control the water environment pollution in the Tuhai River Basin,the gray water footprint and intensity of the Tuhai River Basin in 2021 were measured using the statistical data and digital elevation models of cities of Liaocheng,Jinan,Dezhou,and Binzhou in the basin with 16 counties or districts as the units.The spatio-temporal changes and spatial differences of the gray water footprint of the basin from 2011 to 2021 were analyzed using ArcGIS 10.7 and other softwares.Combined with Gini coefficient,the regional differences in gray water footprint intensity in cities of Liaocheng,Jinan,Dezhou,and Binzhou were evaluated and the influencing factors on gray water footprints were analyzed by using stochastic impacts by regression on population,affluence,and technology(STIRPAT)model.The results show that,on the time scale,the gray water footprint of the Tuhai River Basin decrease at an average annual rate of 1.7％,and the contributions of agricultural,domestic and industrial gray water footprints are 80.14％,15.51％and 4.35％,respec-tively.On the space scale,the gray water footprint of Yangxin County is the largest(7.56×108 m3),while that of Dong'e County is the smallest(2.46×108 m3).Gini coefficient of grey water footprint intensity in the Tuhai River Basin is 0.398,and the spatial gap is at a relatively reasonable level.Effective irrigation area has the greatest impact on the grey water footprint of the Tuhai River Basin,while the gray water footprint strength has the least impact.
grey water footprintspatio-temporal evolutionGini coefficientthe Tuhai River Basin
万方数据
维普
