基于MSAVI-SI特征空间的玛纳斯河流域灌区土壤盐渍化研究

发布时间：2018-03-10 13:16

本文选题：土壤盐渍化　切入点：修改型土壤调整植被指数(MSAVI)　出处：《干旱区研究》2016年03期 　论文类型：期刊论文

【摘要】：玛纳斯河灌区是新疆重要的农业绿洲之一,其发展受土壤盐渍化制约,土壤盐渍化信息获取成为首要问题。以Landsat-OLI卫星影像和野外调查数据为基础,对修改型土壤调整植被指数(MSAVI)和盐分指数(SI)之间的关系进行了综合分析,并提出了MSAVI-SI特征空间概念,进而构建了盐渍化遥感信息提取指数模型(MSI)。结果表明:1不同程度盐渍化类型MSI平均值差异特征明显,其差值在0.35~0.43,因此,MSI指数可以作为盐渍化信息快速提取的指标。2灌区土壤受盐渍化侵扰严重,尤其从下游农业生产区到古尔班通古特沙漠过渡的生态脆弱区,受地下水影响明显的中段,土壤盐渍化仍是土地退化的重要原因。本研究对土壤盐渍化遥感监测和管理,以及区域环境保护具有重要意义。
[Abstract]:Manas River Irrigation area is one of the most important agricultural oases in Xinjiang. Its development is restricted by soil salinization, and the information of soil salinization becomes the most important problem. The relationship between modified soil adjusted vegetation index (MSAVI) and salt index (SI) was analyzed, and the concept of MSAVI-SI feature space was put forward. Furthermore, an index model of remote sensing information extraction for salinization was constructed. The results showed that the MSI mean values of different salinization types were different in different degrees. The difference is 0.35 ~ 0.43, so the MSI index can be used as an indicator of rapid extraction of salinization information. 2. Soil in irrigated area is seriously disturbed by salinization, especially in the ecologically fragile area from downstream agricultural production area to Guerbantungott desert. Soil salinization is still an important cause of land degradation in the middle section affected by groundwater. This study is of great significance to remote sensing monitoring and management of soil salinization and regional environmental protection.
【作者单位】：石河子大学;
【基金】：国家自然科学基金项目(41361073) 国家大学生创新创业训练计划项目(201410759081) 新疆研究生科研创新项目(XJGRI2015044)资助
【分类号】：S156.41

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