基于3S技术的干旱区绿洲土壤盐渍化动态监测

Dynamic Monitoring of Soil Salinization in the Arid Region Oasis Based on the 3S Technology

选择生态环境脆弱的艾比湖地区绿洲为研究对象,采用1990年、2001年、2010年3期TM和ETM+影像为数据源进行土壤盐渍化分类,对研究区20 a土壤盐渍化动态变化进行了统计与分析。研究结果表明,非盐渍化土壤分布的面积最为广泛,但动态变化最为缓慢;轻度盐渍地经历了先增加后减少的过程,中度盐渍地在这20 a里一直呈现出下降的趋势;重度盐渍地在1990年分布面积最多,为366.35 km2;极重度盐渍地分布面积最少,但面积变化最为剧烈。

This paper chose the oasis of Ebinur lake region as a study area,based on the Landsat TM remote sensing data in 1990,2001 and 2010,statisticed and analyzed of the area 20 years of soil salinization,grasped the overall situation of soil salinization in the study area for salinity control and land management,which could provide a strong basis of science.The conclusions is show that the non-salinization is the most widely distributed in the study area,however,it has the slowest dynamics,and slightly saline soil increased first,then decreased.In the past 20 years,moderate salinity has been showing a downward trend,severe salt distribution area in 1990,up to 366.35km2,and very severe saline soil has the least distribution,but its area make of rapid change.