松辽平原土地盐碱化动态监测与遥感分析

发布时间：2018-12-26 14:02

【摘要】：以1975年MSS遥感影像、1990年TM遥感影像、2012年CBERS遥感影像为信息源,建立科学的遥感解译标志与盐碱化分类体系,结合GIS的分析方法,对松辽平原38年间土地盐碱化动态变化进行研究。结果表明,松辽平原盐碱化土地的面积总体呈增加趋势,土地轻度盐碱化呈先增加后减少的趋势,中度盐碱化、重度盐碱化均有增加的趋势,其中重度盐碱化增加的速度较快。1975—1990年期间,松辽平原土地盐碱化在面积和程度上呈扩大和加重的趋势,恶化面积远大于逆转面积,生态环境趋于恶化;1990—2012年间,研究区内盐碱化逆转势力较强,逆转的土地面积已经接近于恶化的面积,说明整个区域盐碱化的状况有所改善。盐碱土地重心分析结果表明,松辽平原盐碱化土地的重心在38年内有向东、向北偏移的趋势。
[Abstract]:Taking the MSS remote sensing images in 1975, TM remote sensing images in 1990 and CBERS remote sensing images in 2012 as information sources, a scientific classification system of remote sensing interpretation marks and salinization was established, and the analysis method of GIS was combined. The dynamic changes of soil salinization in Songliao Plain during 38 years were studied. The results showed that the area of salinized land in Songliao Plain had an increasing trend, and the slight salinization showed a tendency of first increasing and then decreasing, and that of moderate salinization and severe salinization was increasing. During 1975-1990, the land salinization in Songliao Plain showed a tendency of enlargement and aggravation in area and degree, the deteriorated area was much larger than the reverse area, and the ecological environment tended to deteriorate. From 1990 to 2012, the reversion of salinization and alkalification was stronger in the study area, and the reversed land area was close to the deteriorating area, which indicated that the situation of salinization in the whole region had been improved. The results show that the barycenter of salinized land in Songliao Plain is eastward and northward in 38 years.
【作者单位】：辽宁省交通高等专科学校;
【基金】：中国地质调查局项目(编号:1212010911084) 辽宁省交通高等专科学校优秀人才项目(编号:lnccrc201401)
【分类号】：S156.41;S127

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