摘要
将遥感技术与野外调查相结合,根据野外调查点中砂性土和黏性土在遥感影像上的反射光谱特征解译了潮白河中游冲积平原浅层沉积体的分布格局,利用钻孔岩芯验证了遥感解译结果,并综合面上和垂向规律分析了研究区的宏观沉积特征。结果表明:早期中低空间分辨率Landsat TM影像数据在识别地表岩性时效果较好,在B7(R),B4(G),B1(B)波段组合下砂性土与黏性土色调差异明显,颜色饱和度可以反映同种岩性粒度上的变化;利用钻孔浅层岩芯对遥感解译结果进行验证,两者基本一致;研究区表层沉积体自西向东可以分为右堤外河漫滩、现代河床、左堤外河漫滩、古河道和泛滥洼地5个沉积体,其中古河道发育深度浅,以透镜体形式存在,河床及其两侧河漫滩、河漫洼地在20 m以浅继承性发育,各沉积体随着河流的摆动此消彼长。
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.
作者
张竞
纪冬丽
白耀楠
苗晋杰
郭旭
杜东
裴艳东
ZHANG Jing;JI Dongli;BAI Yaonan;MIAO Jinjie;GUO Xu;DU Dong;PEI Yandong(Tianjin Centre,China Geological Survey,Tianjin 300170,China;School of Environmental and Municipal Engineering,Tianjin Urban Construction College,Tianjin 300384,China)
出处
《国土资源遥感》
CSCD
北大核心
2019年第1期156-163,共8页
Remote Sensing for Land & Resources
基金
中国地质调查局地质调查项目"京唐秦发展轴主要城镇综合地质调查"资助
关键词
潮白河
遥感
LANDSAT
TM
沉积
钻孔
Chaobai River
remote sensing
Landsat TM
sedimentation
borehole
