吉林省西部荒漠化发展的陆地卫星遥感监测分析

A MONITORING ANALYSE OF DESERTIFICATION DEVELOPMENT IN WESTERN JILIN OF CHINA BY LANDSAT TM DATA

摘要: 依据1996年8～10月和1988年8～10月两个时期的LANDSATTM遥感信息静态反演,对两个时期ＴＭ资料采用图像增强处理和计算机监督分类进行荒漠化(侧重乾安县盐渍化)解译和动态量变分析,并与1976年和1981年的卫片进行对比分析,研究结果表明,吉林省西部的生态环境在恶化,主要表征为荒漠化发展并向东扩张,已波及吉林省中部松辽平原。大安县是吉林省盐渍化面积最多的县份,已占全县总面积的50%以上;乾安县是盐渍化面积漫延较快的县份,盐渍化面积8ａ增加了269.77km2,增加量占总面积的7.87%

Abstract: Based on Landsat TM data from August to October in 1996 and 1988,we interpret desertification and calculate its dynamical quantity change during the two periods by supervised classification,and contrast this result with TM or MSS image films in 1976 and 1981.The result indicates that ecosystem environment in western Jilin worse further,desertification development and extending eastward,spreading to Song-Liao Plain in central Jilin.Salinizalion area in Daan County.which is the most serious in Jilin,is over 50% of the whole county.In Qianan County,salinization area increasement (7.87% of the whole county) is 269.77 km2 from 1988 to 1996.