杂谷脑河流域土地利用/覆被变化特征研究

以四川省杂谷脑河流域2179KM2范围为研究对象,以1980年、1992年、2001年和2006年的TM遥感数据为基础,结合地形图、林相图等辅助资料,以RS和GIS技术为支撑,对研究范围内的七类土地利用类型从土地利用结构幅度变化和速度变化角度进行研究。结果表明:26a间,林地和未利用地面积减少,其余五类用地面积呈增加状态,从多至少依次为是灌木林地、草地、耕地、居民地和水域;R1和R2变化值最大都是居民地,R1最小的为水域,R2最小的为未利用地。

The Study of the Land Use/Cover Change of Zagunao River Basin

The study takes a 2179km2 land area of Zagunao River basin as the research object.The study is based on TM remote sensing data of year 1980,1992,2001 and 2006 with the consideration of topographic map and forest form map.It also uses RS and GIS as the technical support,researching seven types of land use in the amplitude variation and speed change of land use structure.The results show that:within the 26a,the forest land and unused land area are reduced;the rest five kinds of land increase in area and from the most to the least there are shrub land,grassland,and cultivated land,habitable land and waters;R1 and R2 change most in habitable land,R1 changes least in the waters and R2 changes least in the unused land.