摘要
利用1986年(TM)和2001年(ETM)卫星遥感影像数据和RS-GIS集成技术,对松嫩平原盐渍化土地的现状、程度和发展趋势进行了量化分析.结果表明,这15年中,松嫩平原盐碱地面积增加了21.7112×104hm2,每年增加1.45×104hm2,年平均增长率为1.4%.其中轻度盐渍化土地增加8812hm2,年平均增长0.16%;中度盐渍化土地增加3.8306×104hm2,年平均增长0.64%;重度盐渍化土地面积增加了16.9994×104hm2,年平均增长了4.2%.气候变暖,降水减少,人为活动增强是盐渍化程度加重的主要驱动力.
Landsat TM （ETM） images acquired in 1986 and 2001 and the RS-GIS integrated technique are adopted to quantitatively analyze the present situation, degrees and developing trend of salinized-alkalized land in Songnen plain. It is concluded that, during the 15 years, the area of salinized land has increased 21.7112 ×10^4hm^2, averagety 1.45 ×10^4hm^2 per annum, with average annual increase rate of 1.4%. Among them, the salinized areas in light-degree, mediatedegree and heavy-degree have increased respectively by 0. 8812×10^4hm^2, 3. 8306 ×10^4hm^2 and 16. 9994×10^4hm^2, with average annual increase rate of 0. 16%, 0. 64% and 4. 2% respectively. The main drives for the increase of salinization are the warming climate, reduced precipitation and increased human activities.
出处
《地质与资源》
CAS
2007年第2期120-124,共5页
Geology and Resources
基金
中国地质调查局"松嫩平原地下水资源及其环境问题调查评价"项目(编号1212010430352)资助.
关键词
土壤盐渍化
动态变化
松嫩平原
land salinization
developing trend
Songnen plain
