Study On The Analysis And Optimization Of Land Use Structure Around Ancient River In Central District Of Beijing

In recent years,China regards the construction of ecological civilization city as a necessary means to promote the sustainable development of our city,and water ecological civilization,as the core part of ecological civilization,directly affects the whole process of ecological civilization construction.Urban river has many functions,such as resources,ecology,landscape,environment,culture and so on.Its planning and construction affect the development and deduction of the city,and it is an important carrier of the construction of water ecological civilization.In the process of urban development,the river plays an important role in connecting the city,improving the environment and inheriting the history.The ecological environment,waterfront landscape and cultural connotation of the city are closely related to the river.At present,the study of ancient river course,focusing on landscape,focusing on static,lack of dynamic change research,lack of analysis of the surrounding land structure.In this paper,Beijing,which has a long history,is selected as the study area,and the ancient historical map method and homogenization analysis method are mainly used to study the land structure around the ancient river channel,so as to serve the construction of ecological civilized city and the development of land use.The main research contents of this paper are"study on the change of ancient river course in central urban area","analysis of land use structure around ancient river channel"and"suggestion on ancient river course development and optimization of surrounding land use structure".The main results are as follows:(1)The existing ancient rivers in the central city of Beijing include 10 lakes and14 rivers,including Yongding River,Tongzi River,Liangma River,Ba River,Tonghui River,Chang River,Qing River and so on.The ancient rivers that died out included the Northeast drainage River,the west moat,the east moat,the former Sanmen moat,the east-west Jianshui River and so on.(2)The total area of buffer zone around the ancient river channel is about 337.67km~2,and the proportion of residential land is the highest,accounting for 30.71%.Public management and public services account for about 19.29%,and most of these two types of land appear in succession.Most of the other land use types are scattered.The homogeneous area with low homogeneity(0 to 0.6)accounted for the largest proportion,which appeared in the west moat and north-south moat,mostly residential land and public management and public service land.High degree of homogeneity(>0.9),accounting for 17.67%of the area,Most of them are distributed in the northwest(mostly water area and other land use types),around Old Summer Palace(mostly public management and public service land),northern Chang River(mostly residential land)and the north section of the southeast drainage river(mostly water area and other land use types).The homogeneity around the inner city river is mostly distributed in the range of 0.6 to 0.9.(3)Combined with the location of the ancient river,in the northwest area of Haidian District,such as the Qing River,Long River and other rivers,we should ensure a certain amount of land for educational and scientific research design,and the rivers in Shijingshan District,such as the Yongding River,should ensure a certain proportion of green space.The land for public management and public services should be arranged reasonably around the Ba River and tTonghui River in the northeast.In the whole area,the traditional industrial zone should be replaced,the traffic land should be integrated,and the land for green space,public management and public service should be increased.At the same time,it is necessary to meet the requirements of the river for the construction of sponge city and waterfront.