浅析泥石流堆积物的光谱特征——以蒋家沟泥石流堆积物为例

SIMPLE ANALYSIS ON THE REFLECTANCE SPECTRUM OF DEBRIS FLOW DEPOSIT ——Take Jiangjia gully debris flow deposit as an example

作者运用 10 0 BXMTS野外光谱仪探测了小江支流蒋家沟新、老泥石流堆积物的光谱反射率 ,总结了新、老堆积物的反射光谱特性 ,进一步分析了影响泥石流堆积物反射光谱特性的因素 (岩性、水分含量、植被覆盖 ) ,最后讨论了应用高空间分辨率遥感图像解译泥石流堆积物的可能性。

The authors detected the spectral reflectance of debris flow deposit by using field spectrometer 100BXMTS, made in U.S., and sketches its reflectance spectrum curve.According to contrastive analyzing,the following conclusion are made: (1) The spectral reflectance of deposit relates to the deposit formation time. The newer deposit is the higher reflectance, the older deposit is,the lower reflectance. (2) The spectral reflectance of deposit relates to the lithological character of the solid particles in the deposit. Among the deposits the authors detected, the deposit has the highest spectral reflectance, of which major solid ingredient is mylonite, and the deposit has the lowest spectral reflectance, of which major solid ingredient is metamorphics ever heavily metamorphosed. (3) The spectral reflectance of deposit relates to moisture content. The reflectance spectrum curve of the deposit with the higher moisture content has obvious wave pattern, and the curve of the deposit with the lower moisture content has the flat one. With the increment of the deposit moisture content, the average reflectance appears a trend of decrement increment. (4) The spectral reflectance of deposit relates to the vegetation. The reflectance spectrum of deposit with vegetation mainly reflects the spectrum of plant.