基于RS的崇明岛土地利用变化及驱动力分析

Land Use Changes and Driving Forces in Chongming Island Based on RS

对区域某时段内土地利用变化进行研究,并分析引起变化的驱动力因素,可以了解该区域土地资源利用的合理性,并为进一步制定符合土地资源可持续发展的经济发展规划,尤其为发展低碳产业提供科学依据。运用遥感软件ENVI 4.8对崇明岛2000年、2005年、2010年3期Landsat ETM+遥感影像进行解译分类,对土地利用变化的特征和速率及驱动力因素进行分析。结果表明:崇明岛总面积不断增加,各土地利用类型的面积不断变化,表现出耕地及林地面积呈减少趋势,其中,林地降幅最大;建设用地、水体及未利用地面积呈增加趋势,其中,建设用地增幅最大;土地利用变化的速率不断提高。引起崇明岛土地利用变化的主要驱动力因素为社会经济因素,具体包括农业发展、人口增长及以工业为主的经济发展等;表现为碳源的土地利用方式面积减少,而表现为碳汇的土地利用方式面积则增加。

Studying on the regional land use change within a certain period and its driving force factors were to judge the land resource utilization rationality, as well as the sustainable development of economic, especially to provide scientific basis for the development of the low carbon industry. The author made an interpretation about there phase Landsat ETM ＋ image of Chongming island by remote sensing software ENVI 4.8, the characteristics and rate about land use change and the driving force factors were also analyzed. The main results showed as the follows： the Chongming island area increased accompanied by changing, each type was changing, in which the area of cultivated land and forest land decreased, among them, the forest land dropped most; the area of construction land, water and unused land showed an increasing trend, among them, the construction land gained the most. The rate of the land use change was continuously improved. The most important factor was social and economic factor, including agricultural and industrial development models, population growth. For the performance of the carbon source forms of land use area reduced, and performance for the increase of carbon.