| As the rapid development of the society,the constructions of Chenggong district,Kunming city has become more and more modern,which changed the city structure.Fast urbanization is indicated not only on the increasing of the proportion for urban population,but also the changes about the all kinds of land using,city landscape layout,industrial structure and employment.Chenggong construction remains rapid development on every aspect in recent years,and its economy also remains fast,stabilized and continuous development,which causes the frequent changes for the land surface,as well as the city landscape layout.Take Chenggong district as the research subject;by using the 6 semesters Landsat TM remote sending images and digital elevation image(DEM precision is 10 meters)as data source,integrating the GIS and RS technology and the theory and study methods of landscape ecology,to analyze the landscape layout changes in 25 years in Chenggong district and the space changing feature for different landscapes.The result shows:(1)Different landscapes area ratio in Chenggong district shows dramatic changing during year 1990 to 2015,the total construction has a substantial increasing,land using dynamic is 23.04%;Greening cover has the trend of increasing,decreasing,increasing again and decreasing again,the land using dynamic is 0.72%;planting land is reducing in general,and the land using dynamic is 3.33%;The changing for the water is relatively smaller,no big jumping,and the land using dynamic is only 0.48%;Different landscape areas changes in the space distributions,the construction land is expanding,planting land and other land are reducing.The expanding for the construction land is transferred from the planting land and other lands,which is 56.64 K ㎡ and 27.55 K ㎡.Under the influence of terrain conditions of Chenggong,the city distributes as “U”,and the space changing of different landscape is located in the east of Dianchi.In the terms of landscape level,the urban construction has become more and more complicated,the advantages have become stronger and stronger,and the gathering level is more intensive;The plant covering shows more fragmentation,and lower advantages;the water shape is relatively regular,low fragmentation,and no obvious changing;other land is also decreasing for its gathering level and advantages.In term of landscape level,the total landscape fragmentation level and heterogeneity in Chenggong is increasing,the shape is becoming more and more complex,which shows the developing trend of homogenization and diversification.(2)The whole research for the green landscape is based on the residence Greenland and other Greenland,the city Greenland diversity is relatively low,the ratio distribution for different kinds of green land is not so even,the public green land quantity is less and it’s influenced by the human factors and distributed as unit which will become the bland spot for the green service;green land attached to the units usually has higher dimensions,the spot area just below the residence but also influenced a lot by the human factors;The shape is tend to be regular.(3)Among all the factors which is driving the city landscape dynamic changes,the key driven factor is the rapid development of the economy,the high increasing of popularity,the government policies,industrial structures and other human factors.The influence on the city landscape structure changing and developing trend from terrain factor and constructions can’t be ignored,which can limit the city space structure development of Chenggong in a certain level. |
