丹江口核心水源区土地利用变化研究

Land use change in central water source area of Danjiangkou

南水北调工程是缓解北方缺水问题的重大战略工程与基础设施,中线工程已向北方输水,研究丹江口核心水源区土地利用变化特征,对水源区生态环境的保护有重要意义.论文确定了丹江口核心水源区的范围,基于1990年、2000年和2013年3期的Landsat遥感影像,提取了其土地利用信息;采用土地利用类型面积变化模型、土地利用动态度模型、土地利用程度变化等模型,分析了核心水源区土地利用变化特征:林地、城镇用地面积呈持续增加,耕地、草地面积呈持续减少,其它变化较小;土地利用变化速度逐渐加快,土地利用程度呈持续下降趋势.

The south-north water diversion project is a major strategic project and infrastructure for relieve the shortage of water in the north. The middle route project has be- gun to diverse water to the north. Research on the land use change characteristics of Dangjiangkou central water source area is important for protecting the ecological envi- ronment of the water source area. The Paper determined the scope of danjiangkou central water source area. The land use information was extracted, based on the three peri- od Landsat remote sensing images of the year 1990, 2000 and 2013. Through the area of land use type change model, land use dynamic degree model, the degree of land use change model, the land use change characteristics of central water source area were ana- lyzed. Area of forest land and urban land continue to increase, while cultivated land continues to reduce and other changes were smaller. Speed of land use change gradually in- creases, and land use degree continues to decline.