Reflectance spectral characterization and mineralogy of acid sulphate soil in subsurface using hyperspectral data
MetadataShow full item record
Acid sulphate soil (ASS) is a kind of soil which is harmful to the environment. ASS is hard to efficiently assess efficiently in the subsurface, although it is detectable on the surface by remote sensing. This paper aims to explore a new way to rapidly assess ASS in the subsurface by introducing a proximal hyperspectral instrument, namely the Hylogger™ system which can rapidly scan soil cores and provide high resolution hyperspectral data. Some minerals in ASS, which usually act as indicators of the severity of ASS, such as iron oxides, hydroxides, and sulphates, as well as some clay minerals, such as kaolinite, have diagnostic spectral absorption features in the reflectance spectral range (4002500 nm). Soil cores were collected from a study area and hyperspectral data were acquired by Hylogger™ scanning. The main minerals related to ASS were characterized spectrally, and were subsequently identified and mapped in the soil cores based on their reflectance spectral characteristics. Traditional X-ray diffraction (XRD) and scanning electron microscope (SEM) were also applied to verify the results of the mineral identification. The main results of this study include the spectral characterisation of ASS and its main compositional minerals, as well as the distribution of these relevant minerals in different depth of cores.
Showing items related by title, author, creator and subject.
Shi, Xianzhong; Aspandiar, Mehrooz; Oldmeadow, David (2014)Purpose - Acid sulphate soil (ASS) has raised increasing environmental concerns because of its capability to produce strong acidity and consequent trace metal release. It is difficult to assess the occurrence and severity ...
Shi, Xianzhong; Aspandiar, Mehrooz; Oldmeadow, David (2013)Acid sulphate soils (ASS) are widely spread around the world and are potentially harmful to the environment due to their strong acidity producing ability and their capability to release trace metals. Secondary iron-bearing ...
Shi, X.; Aspandiar, Mehrooz; Lau, I. (2013)Acid sulphate soils (ASS) are harmful to the environment, but it is detectable because they contain secondary iron bearing minerals which have diagnostic spectral features in reflectance spectral ranges, and these iron ...