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％。
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 supervisedclassification, and contrast this result with TM or MSS image films in 1976 and 1981. Theresult indicates that ecosystem environment in western Jinn worse further, desertificationdevelopment and extending eastward, spreading to Song-Liao Plain in central Jilin. Salinization area in Daan County. which is the most serious in Jinn, is over 50% of the whole county. In Qianan County. salinization area increasement (7. 87% of the whole county) is269. 77 km2 from 1988 to 1996.
出处
《气象学报》
CSCD
北大核心
1999年第6期662-667,共6页
Acta Meteorologica Sinica
基金
国家重点基础研究发展规划项目!G1999043400
关键词
吉林
陆地卫星资料
生态环境
荒漠化发展
遥感
Western Jinn
Landsat TM data
Ecosystem environment
Desertification development.
