Grasslands had been revised with the method combined supervised and non-supervised classifications using Landsat data in autumn of 1996 and 1986. The advanced algorithm was used to improve the accuracy. The result shows that first, the grassland environment in the West Jilin is worsening and the area is decreasing by an average of 4.5?104 hectares a year; second, the grassland degeneration is sharpening and the degeneration area is 81.1% of the total. The degeneration becomes heavier, and the middle and heavy degenerated grasslands are developing in higher proportion.
LIU Zhi-ming, YAN Ming, WANG Gui-qing, MENG Hua, ZHANG Wen-zhe, WANG Chun-hui
. Analysis on Grassland Degeneration in the West Jilin Province Based on Satellite RS[J]. SCIENTIA GEOGRAPHICA SINICA, 2001
, 21(5)
: 452
-456
.
DOI: 10.13249/j.cnki.sgs.2001.05.452
[1] 中国科学院自然区划委员会.中国综合自然区划(初稿)[M].北京:科学出版社,1959.169~175.
[2] 郭德方.遥感图像的计算机处理和模式识别[M].北京:电子工业出版社,1987.243~390.
[3] 李夏,焦伟利.改善TM卫星遥感图像自动识别精度的研究和应用[J].遥感技术与应用,1994,9(3):30~35.
[4] 北方草场资源调查办公室.草场资源调查技术规程[M].北京:中国农业出版社,1986.
[5] 吉林省地方志编纂委员会.吉林省志(畜牧卷)[M].长春:吉林人民出版社,1996.253~257.
[6] 廉毅,等.吉林省西部荒漠化发展的陆地卫星遥感监测分析[J].气象学报,1999,57(6):662~667.
