玛纳斯河流域土壤盐渍化现状及其与光谱关系研究

Analysis on Relationships between Soil Salinization and Spectra in Manas River Valley

以玛纳斯河流域为研究对象,选择冲积洪积扇、冲积平原和干三角洲3种主要地貌类型为研究区域,利用便携式光谱仪测量土壤光谱反射率,结合土壤盐分因子数据进行统计分析,探讨玛纳斯河流域土壤盐渍化现状特征及其与土壤光谱之间的关系。结果表明:研究区土壤盐分组成具有明显的地域性特点;在少数光谱波段,3种地貌类型的含盐量及占优势的盐离子均与光谱反射率呈显著相关,在此基础上,建立多元线性回归模型,为玛纳斯河流域地物光谱数据库的建立及土壤盐渍化的遥感监测提供科学依据。

Taking Manas River Valley as an example,three landform types of alluvial proluvial fan,alluvial plain and delta were selected for the study targets,portable spectrometer was used to measure the soil spectral reflectance,combined with the statistical data of soil salinity,the soil salinity status characteristics and the relationship between soil spectrum in Manas River Basin were approached.The results showed that： in the studied region the composition of soil salinity has obvious regional characteristics;in a small number of spectral bands,the salt content and the dominant salt-ions of the three landfrom types are significantly correlated with the spectral reflectance.On this foundation,multiple linear regression model is established,thus providing a scientific basis for the establishment of spectral database and remote sensing monitoring of soil salinization in Mans River Valley.