Study On REgional Comparison Of Land Use Change Between Core Area And Fringe Area Of Pearl River Delta

Land use/land cover change is still one of the most topic issues that concerned in the resources and environment field. Using remote sensing images to analyze the temporal and spatial change of regional land use/land cover, is a common way to research. In the past 20 years, with the rapid economic development of Pearl River Delta, the contradiction in land use intensified. There are differences between core area and fringe area in land use structure and change.?The systematic and quantitative analysis in the internal differences helps to provide resources guarantee to achieve the Pearl River Delta development planning.This article extracted the land use change information through the interpretation of remote sensing images in 1990, 1999 and 2008.Using the rate of land use change, the dynamic model and the two-way dynamic model of land use to construct the comparable index system. It is the first time that analyzed quantitatively the land use change of Pearl River Delta in a uniform scale in the nearly recent 20 years. The land use change between core area and fringe area has analyzed comparatively .The results indicated:1. According to the proportion in sequence of land use types of Pearl River Delta in 2008, the result was forest, cultivated land, towns and rural settlements, water, mining warehousing land, orchard, pond, other land, transportation and grassland.2. In the recent 20 years, the land use of Pearl River Delta has changed drastically, all kinds of types have varied significantly expect for the forest, Residential and other built-up land increased by 3 times, the pond reduced nearly a half. But the ratio of transformation was different. Residential and other built-up land were the most dramatic change in all land use types. The cultivated land and pond followed.3. Owing to the influence of natural condition, geographic condition, economic stage, industrial structure and other factors, the land use structure had apparent differences between core area and fringe area. The area ratio of forest, cultivated land, built-up land is 3:1:4 in the core area at present, the ratio is 6:1:2 in the fringe area. But the ratio in 1990 is 5:4:1 in the core area, and 18:7:1 in the fringe area.4. The cultivated land in core area and fringe area both reduced, but the rate of decrease in the late period is slower. Residential and other built-up land both increased, and the trend continued to growth. The increase in core area was mainly from the internal restructuring of built-up land, in fringe area mainly depended on the occupation of cultivated land and other land.5. When interpret a large scale of remote sensing images, maximum likelihood classification is a fast, simple and easy way to operate. By extracting multi-source information through remote sensing images, improves the classification accuracy of remote sensing images. There are large differences in natural conditions, economic levels and industrial structure between core area and fringe area of Pearl River Delta, which made differences in land-use structure, land-use change and land-use efficiency. But with the implementation of the Pearl River Delta Planning and double-transfer strategy, fringe area as industrial layout adjustment and transfer of undertaking area of core area, new changes in the land use structure and efficiency will occur, which need optimal adjustment and scientific configuration. The following study will focus on land resource use and the relationship with economic and social development, which provides a scientific basis on sustainable use of natural resources and regional scientific development.