1.Tianjin Centre, China Geological Survey, Tianjin 300170, China 2.School of Environmental and Municipal Engineering, Tianjin Urban Construction College, Tianjin 300384, China
According to the reflectance spectroscopy of remote sensing (RS) data of field sandy soil and cohesive soil, the shallow sedimentary framework in the middle reach of Chaobai River (MRCR) was interpreted and proved by sediment cores. Considering regional and vertical variation, the authors investigated the macro-characteristics of the sedimentation in the MRCR. The results show that early mid-low spatial resolution Landsat TM data are effective in identifying sandy soil and cohesive soil, and the two kinds of soil have obviously different colors in B7(R), B4(G)and B1(B), and the change of grain size can be reflected by color saturation. The shallow sediment cores are in good agreement with RS interpretation. Finally, the shallow deposits can be divided into five parts: the left floodplain, the recent riverbed, the right floodplain, the paleo-river and the flood lowland. Among them, paleo-rivers are developed in shallow layer as lenses, while the other parts exhibit inherited development at the depth of 20 m and shift with the river swinging.
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2019, Vol. 31 
