光谱学与光谱分析 |
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Hyperspectral Detection Model for Soil Dispersion in Zhouqu Debris Flow Source Region |
WANG Qin-jun1,2, WEI Yong-ming1, CHEN Yu1,2*, CHEN Jia-ge3, LIN Qi-zhong1 |
1. Key Laboratory of Digital Earth Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100094, China 2. Key Laboratory of the Earth Observation of Hainan Province, Institute of Remote Sensing for Chinese Sciences, Sanya 572029, China 3. Shandong University of Science and Technology, Qingdao 266590, China |
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Abstract Sensitive band positions, models and the principles of soil dispersion detected by hyperspectral remote sensing were firstly discussed according to the results of soil dispersive hyperspectral remote sensing experiment. Results showed that, (1) signals and noises could be separated by Fourier transformation. A finely mineral identification system was developed to remove spectral noises and provide highly accurate data for establishing soil dispersive model; (2) Soil dispersive hyperspectral remote sensing model established by the multiple linear regression method was good at soil dispersion forecasting for the high correlation between sensitive bands and the soil dispersions. (3) According to mineral spectra, soil minerals and their absorbed irons were reflected by sensitive bands which revealed reasons causing soils to be dispersive. Sodium was the closest iron correlated with soil dispersion. The secondary was calcite, montmorillonite and illite. However, the correlation between soil dispersion and chlorite, kaolinite, PH value, quartz, potassium feldspar, plagioclase was weak. The main reason was probably that sodium was low in ionic valence, small ionic radius and strong hydration forces; calcite was high water soluble and illite was weak binding forces between two layers under high pH value.
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Received: 2015-01-18
Accepted: 2015-04-26
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Corresponding Authors:
CHEN Yu
E-mail: yuchen@ceode.ac.cn
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