Occupation Of Wuhan Urban Lakes And The Changes Of Lake Spatial Morphology Under Its Influence

With its special geographical location,urban lake resources have a profound impact on the development and construction of cities.There are many lakes in the city area of Wuhan,which has created the nickname of "Hundred Lake City" in Wuhan.However,since the founding of the People's Republic of China,the traditional extensive urban development activities have destroyed the original natural ecological and hydrological characteristics of urban lakes.The size of urban lakes has shrunk and further caused The simplification of the shape of the lake,the fragmentation of patches and the reduction of connectivity have negatively affected the urban ecological environment and landscape space.Therefore,this article first summarizes the characteristics of the changes in the size of the urban lake area in Wuhan.On the basis of making sure that the land occupation is the leading factor causing the size change of the urban lake area,we focus on the study of the spatial and temporal changes of the function of the lake land occupation,so as to further explore the land occupation The spatio-temporal characteristics of the lake's spatial morphology changes under the influence of land,and the corresponding urban lake protection strategy based on the optimization of land occupation and space morphology restoration have certain theoretical and practical significance.First,using remote sensing image data to analyze the area scale of urban lakes in Wuhan in the past two decades,it was found that the area scale of lakes has obvious spatial and temporal differentiation characteristics.Second,with the support of GIS software,the function of urban construction land is based on the status of land use.The analysis of the spatio-temporal changes of the city has shown that urban construction land is the leading factor causing the shrinkage of urban lakes.Under this premise,the status quo of urban lakes 'land occupation function composition is analyzed from the overall urban lakes,regions and loops in Wuhan The research results show that the multi-center superimposed multi-circle structure under the pattern of two towns and two rivers in Wuhan makes the land use function of lakes show significant location differences;by analyzing the stage changes of the land use function of lakes in Wuhan cities,it is found that residential Land,roads and transportation facilities,green land and square land are always the main types of land used to fill the lake;finally,the type characteristics of the structure of the occupied land are analyzed from the range of change,the speed of change,and the dominant function.The research results show that the function of the occupied land The variation range and speed of the composition Significant spatial variability,according to occupy and fill lakes dominant function can be divided into residential-led,traffic-oriented and green-oriented,optimization proposal urban lake filled riverbed function constituted on this basis.Finally,the characteristics of the lake's spatial morphology under the influence of filling are analyzed.The research shows that the land occupation leads to the simplification of lake shape,patch fragmentation,and reduced connectivity.Based on the above analysis,the natural shoreline of the lake is repaired to ensure the integrity of the lake.And to strengthen the connectivity of lakes,the three aspects of urban lake spatial morphology are related to optimization suggestions.