摘要
基于1980-2015年7期的Landsat TM遥感影像解译数据,结合地学统计方法对典型岩溶区县域尺度下的土地利用时空演变格局进行定量分析。结果表明,35年来,研究区的用地类型以林地、耕地、草地为绝对主导用地,3者面积比例之和稳定在98%以上,整体变幅较小。研究区用地变化剧烈程度依次是建设用地>水域>林地>未利用地>草地>耕地;从综合土地利用角度看,1995-2005是研究区35年来用地结构变化最快的时段,2005-2015年间变化速度减慢。从用地的转移情况可知,1980-1995年期间各用地的转移量较少;1995-2005年间最显著的特征是耕地转给其他地类的量最多,达22.36km^2,2005-2015年各用地转移趋向缩减,转移不显著。35年来研究区土地的转出量耕地>草地>林地>水域>建设用地,其中,耕地的转出量远多余其他用地,达33.21km^2。
Based on Landsat TM remote sensing image interpretation data of 7 periods from 1980 to 2015,the spatial and temporal evolution pattern of land use at county scale in typical karst areas was quantitatively analyzed with geostatistical method. The results show that:(1)In the past 35 years,woodland、cultivated land and grassland are the absolute dominant land use types in the study area,and the total proportion of the three areas is more than 98%,and the overall change is small.(2)The intensity of land use change in the study area is construction land>water area>woodland>unused land>grassland>cultivated land in turn;from the perspective of comprehensive land use,the10-year period 1995-2005 is the fastest period of land use structure change in the study area in 35 years,and the change rate slows down in 2005-2015.(3)From the situation of land transfer,it can be seen that the amount of land transfer from 1980 to 1995 is relatively small;the most significant feature in the 10 years from 1995 to 2005 is that the amount of cultivated land transferred to other land types is the largest,reaching 22.36 km^2. The trend of land transfer from 2005 to 2015 is decreasing,but the transfer is not very significant. In the past 35 years,the amount of land transferred from the study area was cultivated land>grassland>woodland>water area>construction land. The amount of arable land transferred is far more than that of other land,reaching 33.21 km^2.
作者
刘南健
安佑志
李松
Liu Nanjian(School of geography and resources,Guizhou Education University,Guiyang 550018,China)
出处
《安徽农学通报》
2019年第24期112-116,共5页
Anhui Agricultural Science Bulletin
基金
重庆理工大学科研启动基金资助项目
贵州省科技厅科技基金计划项目(黔科合基础[2017]1135)
关键词
土地利用
时空变化
GIS
转移矩阵
Land use
Spatial and temporal change
GIS
Transfer matrix
