Study on changes and driving forces of the cultivated land resource in hilly areas of Central Southern China——A case study of Liling city of Hu'nan
The case is chosen in Liling city which is one of the typical cities in the hilly areas of central southern china.The change of cultivated land of Liling city from 1949 to 2004 was analyzed by using statistical data.Then the driving forces of the cultivated land resource change of Liling in recent 15 years were studied by using principal component analysis.On the basis of this,the paper revealed that the economic development and social systematic pressure were dominical driving forces for changes of cultivated land.In the end,in response to different driving forces,relevant countermeasures were brought forth.
"The population of France's ¿old' urban centres has stopped increasing and urban growth is now concentrated in communes which until very recently were rural.... [The author] presents a detailed analysis of the process of growth of the economically active periurban population of the Ile-de-France. It is based on recent census data, and divides the periurban into two concentric zones and four geographical sectors. The examination of the individual characteristics of the economically active population, and the geographical origin of the newcomers, reveals the existence of an important phenomenon: the increasing social segregation of the urban and periurban populations." (EXCERPT)