基于3S技术的黄龙山林地时空动态变化及驱动力分析

Analyses on Spatial-Temporal Characteristics and Driving Factors of Woodland Changes in Huanglong Mountain Based on 3S Technology

利用黄龙山林区1986年、1997年、2008年3期Landsat TM遥感影像,在"3S"技术支持下分析了黄龙山近20a林地变化的时空特性。同时,结合国民经济统计资料及其他相关资料,对黄龙山林地变化的驱动力进行分析,并建立了各类林地的社会经济驱动力模型。结果表明:1986-2008年黄龙山林地经历了较大幅度的波动变化。主要表现为有林地和其他林地面积持续增加;灌木林地、疏林地面积逐年减少。林地内部存在相互转化,主要转化方向为灌木林、疏林地向有林地转化。相比于1986-1997年、1997-2008年黄龙山林区林地的转化速率在逐渐减缓,有趋于向稳定状态发展。同时,驱动力模型揭示,国民生产总值与黄龙山林区有林地及其他林地变化有较大相关性,灌木林地面积变化主要受社会固定资产总投入影响,农业人口比重是黄龙山林区疏林地变化的重要影响因素。

In this paper,we collected the remote sensing data of Huanglong Mountain in the year of 1986,1997 and 2008,and revealed the temporal and spatial characteristics of forests in this area by using ＂3S＂ technology.Driving forces of woodland changes were analyzed,socio-economic driving force models of various kinds of woodlands by using socio-economic statistical resources were bulit.The results showed that existed significant fluctuations of woodland in Huanglong Mountain.The forestedland and other types of woodland were increasing constantly,while the area of shrubland and open forest land were shrinking.There were internal conversions between different kinds of wood lands,and the main trends were that the shrublands and open forest lands transferred to forested land.The conversion rate of forestry resources in Huanglong Mountain was slow down from 1997 to 2008 compared to that from 1986 to 1997.The socio-economic driving force model demonstrated that the forested lands had high relevance to the GDP increase,and other types of forest variation,while the total investment in fixed assets and the proportion of agricultural population were respectively of high relevance with the area changes of shrub forests and open forest lands in Huanglong Mountain.