| At present,there are many definitions of impermeable water in the academic community,and a more unified statement has not yet been formed.However,in a narrow sense,impermeable water surface generally refers to preventing water flow from quickly penetrating below the surface,which is mainly a hardened surface made by hand,such as housing buildings,roads,underground parking lots and other non-permeable surfaces.It is studied that impervious water surface is due to the deterioration of the urban environment caused by the expansion of impervious surface,such as the deterioration of water quality indirectly caused by the increase in surface runoff,the increase in municipal drainage and the pressure on urban flood control[2].At the same time,with the development of social economy,the process of urbanization is constantly accelerating.In the study of exploring urban expansion and urban ecological environment,impervious water surface,as an important indicator to measure the level of urbanization and urban ecological environment,is also being valued by more and more researchers.In this paper,through the research and analysis of the spatial pattern changes and driving forces of impervious water surfaces,the laws of impervious water surface changes in the process of urban development in Wuhan and the driving factors that cause such changes are explored,so as to provide a scientific and reasonable reference basis for urban development planning such as the construction of "sponge city" and the construction of ecological civilization in Wuhan.The main contents and achievements of this paper are as follows:(1)To study the changes and spatial distribution of impervious water surfaces in Wuhan.Firstly,the research in this paper is based on the monitoring and monitoring data of the geographical national conditions of Wuhan from 2015 to 2020,and the permeability of different surface types is analyzed according to the classification table of surface coverage in Wuhan,and then the surface coverage type with poor permeability is selected to extract the impermeable water surface data of Wuhan from 2015 to 2020.(2)The overall quantity change of impervious water surface in Wuhan from 2015 to 2020 and the spatial distribution and spatial pattern are analyzed,and the overall growth trend of impervious water surface in Wuhan city in 2015-2020 is obtained,and the composition of impervious water surface is relatively stable,in terms of spatial distribution,the overall distribution change of impermeable water surface in 2015-2020 is small,according to the distance spectrum analysis,the density change law of impervious water surface in Wuhan is shown to be the largest at 3-6 kilometers from the center.6 kilometers away with the increase of distance and decrease,from the direction of the impermeable water surface standard deviation ellipse of the main axis are consistent with the direction of the Yangtze River,and the change is small,indicating that the overall development direction of Wuhan tends to be unchanged is still based on the Yangtze River(3)For the driving analysis of impermeable water in Wuhan,mainly through the selection of appropriate social,economic,humanistic and other driving factors,combined with the fitting degree analysis and correlation analysis of the qualitative study of the driving force of impervious water surface changes,the urban expansion of Wuhan in recent years has a high correlation with socio-economic factors and social development factors,of which socio-economic factors are the main driving force for the urban development and expansion of Wuhan,followed by social development factors,and population factors are indirect driving forces.In addition,by constructing the driving factor index and using the spatio-temporal geographical weighted regression model,the spatio-temporal evolution of the main drivers of impermeable water surface change in each region is also studied. |
PDF Full Text Request