陕西卤泊滩盐渍地生态环境遥感监测研究

Study on remote sensing monitoring of ecological environment in Lubotan saline land of Shaanxi Province

针对土壤盐渍化地区难以进行信息有效提取和动态监测的问题,本研究构建了改进后的土壤盐渍化生态指数(MSSEI)。利用主成分分析方法,获取卤泊滩1994~2015年的生态环境状况指标。结果表明,在卤泊滩盐渍化区,湿度指数和植被指数对研究区生态环境起正面的贡献;而土壤盐度—建筑指数和地表反照率对卤泊滩生态环境起负面影响;卤泊滩土壤盐渍化生态指数MSSEI 1994~2003年均值从0.607下降到0.572;2003~2015年均值从0.572上升到0.673。因此,通过对卤泊滩土壤盐渍化的综合治理,其生态环境质量呈现逐渐好转的趋势。

In order to solve the problem that it is difficult to extract information effectively and monitor dynamically in soil salinization area,the improved soil salinization ecological index(MSSEI)was constructed in this study.The principal component analysis method was used to obtain the eco-environmental status index of Lubotan from 1994 to 2015.The results showed that the humidity index and vegetation index had a positive contribution to the ecological environment,while the soil salinity-building index and surface albedo had a negative effect on the ecological environment.The average value of soil salinization ecological index MSSEI decreased from 0.607 to 0.572 during 1994 to 2003,and increased from 0.572 to 0.673 during 2003 to 2015.Therefore,through the comprehensive treatment of halogen beach soil salinization,the ecological environment quality showed a trend of gradual improvement.