基于遥感的陕蒙交界地区土地利用变化研究

Study on land use changes of the common boundary of Shaanxi and Inner Mongolia based on the remote sensing technologies

选取陕蒙交界典型地区,利用1989、1999、2001、2002年4期遥感数据,通过土地利用类型变化量和变化率研究该地区土地利用类型变化的空间差异与影响。结果表明:该地区土地利用变化表现为湖泊和林草地/耕地面积减少,沼泽、沙丘稀灌和沙丘面积增加。湖泊和林草地/耕地面积减少了29.20km2和256.75km2,分别减少32%和16%;沼泽、沙丘稀灌和沙丘面积增加了20.60km2、131.89km2和129.7km2,分别增加了70%、7%和28%。影响因素分析表明,近20年来该地区气候变化呈暖干化的趋势,气温上升、降雨量下降;同时,陕蒙交界地区近20年来总人口增加了一万多,羊只数增加了3倍多,农业和畜牧业发展迅速,对当地的土地利用格局变化产生重要影响。

According to the four remote -sensing image interpretation of 1989, 1999, 2001 and 2002, LUCC Changes of the common boundary of Shaanxi and Inner Mongolia were researched with the area changes and the change rate of the different land use type. The results showed that the area of woodland and grassland/farmland decreased; while the area of swamps, thin shrub, sand dune increased. The area of lakes and woodland and grassland/farmland decreased 29.20 km^2 and 426.51km^2 respectively,with the reduction rate of 32% and 16%. While, swamps, thin shrub and sand dune increased with 20.60km^2, 274.4km^2 and 129.7km^2 respectively, with the reduction rate of 70% ,7% and 28%. The analysis on the climate and anthropogenic influencing factors s indicated that the average temperature increased, and annual precipitation declined. So, the overall climate showed that climate in this region become warming and drying during 1985 -2005. Also, the population in this region increased more than 10000,and animal husbandry increased three times. With quick development, the agriculture and animal husbandry in this region were the main artificial factors on the change of LUCC.