现代黄河三角洲陆上表层沉积物类型与沉积环境分区及岸线演变

SURFACE SEDIMENTS, SEDIMENTARY SUBENVIRONMENTS AND SHORELINE EVOLUTION OF MODERN YELLOW RIVER DELTA

  • 摘要: 通过对现代黄河三角洲的实地取样和遥感调查,结合历史资料和数据,总结了现代黄河三角洲表层沉积物类型和沉积环境;通过分析黄河改道历史以及黄河大坝修建的时间,将现代黄河三角洲沉积环境划分为7个区,全面地确定了现代黄河三角洲最表层沉积物沉积年代;通过选取黄河三角洲7个时相的Landsat遥感数据,分析了现代黄河三角洲1976-2009年以来的岸线演变,自1976年黄河改道清水沟流路以来,海岸低潮线以上区域面积净减少318.78 km2

     

    Abstract: Based on the data from field samples and remote sensing survey, combined with historical information, we summarized the types of surface sediments and sedimentary subenvironments of the modern Yellow River Delta in this paper. According to the history of the Yellow River channel changes and dam building,the delta was subdivided into seven subenvironments. The surface deposits were dated and the shoreline changes from 1976-2009 reestablished with the seven times of Landsat remote sensing data of the delta. Since the Yellow River channel shifted to the current Qingshuigou course in 1976, the coastal area above the low tidal level has decreased by 318.78 km2.

     

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