Study On The Exploitation Of Building Land On The Mild Slope Of Low Mountains And Hills Based On RS And GIS

The economic development has been restricted by the shortage of construction land supply in Fujian Province. In order to protect the cultivated land and slove the contradiction between human and land, it is imperative to utilize the existing land resources in plain area intensively and to exploit the mountains, especially the mild slope of low mountains and hills. Owning to its scarcity and non-regenerate characteristic, it is of important significance to exploit the slope of low mountains and hills rationally. In this paper, taking Fuzhou city as a case study, employing RS and GIS, two land use databases of different year were set up, with the index system of building land suitability evaluation of mild slope of low hill the study area was evaluated; The landscape expression in expansion of building land in the mild slope of low mountains and hills was analysed by the method of landscape pattern; The expansion of building land in the mild slope of low mountains and hills was simulated and predicted by CA model. The result shows that: (1) The quantity of mild slope of low mountains and hills is small, but it is potential for building land exploitation, for most of which is in comparative suitability rank or basic suitability rank, and less than 5% of which is in constrained suitability rank; (2) From 1988 to 2004, the landscape pattern changed dramatically in the mild slope of low mountains and hills in Fuzhou city. Effected by human activities, the landscape changed into fragmentation and the dominance index of class patches decreased; The landscape also changed into fragmentation in building land level, while the patches complexity enhanced and stability reduced. But the distance among building land patches was getting smaller, and the distribution of bulit-land patches was getting agglomerated. (3)The building land keeps expanding, whose speed is decreasing a little after an increasing stage. Finally, the principles and proposals which were about how to exploit mild slope of low mountains and hills rationally were put forward.