地理学报 ›› 2003, Vol. 58 ›› Issue (1): 45-52.doi: 10.11821/xb200301006

• 论文 • 上一篇    下一篇

基于Landsat TM/ETM数据的锡林河流域土地覆盖变化

陈四清1,3, 2, 刘纪远2, 庄大方2,3   

  1. 1. 中国科学院遥感应用研究所,北京 100101;
    2. 中国科学院地理科学与资源研究所,北京 100101;
    3. 美国新罕布什尔大学地球、海洋和空间研究所,Durham, NH 03824
  • 收稿日期:2002-09-10 修回日期:2002-11-15 出版日期:2003-01-25 发布日期:2010-09-09
  • 作者简介:陈四清 (1973- ), 男, 博士, 主要从事土地利用、遥感和GIS制图方面的研究。E-mail: chensq@lreis.ac.cn
  • 基金资助:

    中国科学院知识创新项目(KZCX02-308)和美国NASA土地利用变化项目(NAG5-11160)

Quantifying Land Use and Land Cover Change in Xilin River Basin Using Multi-temporal Landsat TM/ETM Sensor Data

CHEN Siqing1,3, LIU Jiyuan2, ZHUANG Dafang2, XIAO Xiangming2,3   

  1. 1. Institute of Remote Sensing Applications, CAS, Beijing 100101, China;
    2. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
    3. Institute for the Study of Earth, Oceans and Space, University of New Hampshire, Durham, NH 03824, USA
  • Received:2002-09-10 Revised:2002-11-15 Online:2003-01-25 Published:2010-09-09
  • Supported by:

    Knowledge Innovation Project of CAS, No.KZCX02-308; The NASA Land Use Change Program, No.NAG5-11160

摘要:

根据1987年、1991年、1997年和2000年4期Landsat TM/ETM影像的土地利用/土地覆盖分类结果,运用地理信息系统空间分析方法,分析了内蒙古锡林河流域1987~2000年间各土地利用类型及草甸草原、典型草原、荒漠草原的数量变化和空间变化特征。分析结果显示,锡林河流域土地利用/土地覆盖变化的主要特征为草甸草原、典型草原面积的大幅减少和荒漠草原、农田和沙漠化土地面积的大幅增加及城镇的扩张。其中面积增加最大的是荒漠草原,增加了2328 km2;相当于1987年荒漠草原面积的56 %。农田和城镇面积逐年增大,分别从1987年的114.3 km2和25.2 km2增加到2000年的332.1 km2和43.6 km2。面积减少最多的是羊草+丛生禾草、羊草+杂类草等优良高产温带典型草原类型,共减少2040 km2。草甸草原面积亦呈逐年减少的趋势,从1987年的1103 km2减少到2000年375 km2,面积减少了65.9 %。农田、沙化地及城镇等非草原土地利用类型面积增加了62.5 %。

关键词: 土地覆盖;Landsat TM/ETM Sensor Data;锡林河流域

Abstract:

The land use/land cover change of Xilin River Basin in the past two decades was investigated through land use/cover classification of four sets of Landsat TM/ETM images acquired on July 31, 1987, August 11, 1991, September 27, 1997 and May 23, 2000, respectively. Primarily, 15 sub-classes land cover types were recognized, including 9 grassland types at community level: F. Sibiricum steppe, S. baicalensis steppe, A. chinensis + forbs steppe, A. chinensis + bunchgrass steppe, A. chinensis + Ar. frigida steppe, S. grandis + A. chinensis steppe, S. grandis + bunchgrass steppe, S. krylavii steppe, Ar. frigida steppe and 6 non-grassland types: cropland, urban area, wetland, desertified land, saline-alkaline land,and waterbody. To make the time series land cover classification data applicable for land use/cover change quantification analysis, the cloud, waterbody and cloud shadow features were extracted from each of the raw land cover maps and overlaid as a subset map. Then the area corresponding to the subset in each land cover classification map was eliminated. After this procedure, each of the final land cover classification map of Xilin River Basin was optimized and ready for land use/ cover change detection. The main characteristics of land use/land cover change in Xilin River Basin over the past two decades were a significant decrease in area of meadow grassland, temperate grassland vs. significant increase in area of cropland, desert grassland, urban area and desertified land. From 1987 to 2000, the area of both F. sibiricum meadow steppe and S. bacalensis meadow steppe decreased steadily year by year, whose net decrease was 525.5 km2 and 201.5 km2. While the area of S. krylavii desert steppe and Ar. frigida desert steppe increased year by year, whose net increases were 1,282.7 km2 and 1,045.6 km2 respectively. The desert grassland had the greatest increase in area, i.e., 2,328 km2, equal to 56% of the total area of desert grassland in 1987. The cropland and urban area increased from 114.3 km2 and 25.2 km2 in 1987 to 332.1 km2 and 43.6 km2 in 2000, respectively. The A. lymus + bunchgrass steppe, A. lymus + forbs steppe had the greatest decrease in area, i.e., 2,040 km2. During the four periods, A. chinensis + forbs steppe was the widest distributed land cover type in 1987 and 1991, with its area was 5281.2 km2 and 4104.3 km2, respectively. However, in 1997 and 2000, S. krylavii was the most widespread land cover type with an area of 4,109.6 km2 and 4,479.1 km2.

Key words: land-use/land cover change, Xilin River Basin, Landsat TM/ETM+ sensor data