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现代黄河三角洲滨浅海区的灾害地质
引用本文:周良勇,刘健,刘锡清,李广雪,陈正新.现代黄河三角洲滨浅海区的灾害地质[J].海洋地质与第四纪地质,2004,24(3):19-27.
作者姓名:周良勇  刘健  刘锡清  李广雪  陈正新
作者单位:1. 青岛海洋地质研究所,青岛,266071;中国海洋大学,海洋地球科学学院,青岛,266003
2. 青岛海洋地质研究所,青岛,266071
3. 中国海洋大学,海洋地球科学学院,青岛,266003
基金项目:中国地质调查局国土资源大调查项目(200111000003)
摘    要:利用卫星遥感、测深、浅地层剖面及钻孔资料研究了黄河三角洲海岸及近海海洋灾害地质,编制了黄河三角洲海洋灾害地质图。黄河三角洲海岸灾害地质以海岸侵蚀为主,根据1976—2001年海岸的变化速率,可将海岸分为快速侵蚀海岸、中等程度侵蚀海岸、稳定海岸和淤积海岸四类,快速侵蚀海岸和中等程度侵蚀海岸长期以来遭受侵蚀。灾害地质因素有浅层气、灾害地貌、活动断层、海底滑坡、底辟、隆起脊、埋藏冲沟一古河道。浅层气主要分布在老黄河口附近渤海海底,近岸少见。浅层灾害地貌主要分布在三角洲前缘斜坡上的扰动区。扰动区位置在整个三角洲上变动明显,有向岸移动的趋势,斜坡坡度减小,扰动强度减弱。底辟除了发生在废弃三角洲侵蚀区外,还发生在三角洲外的渤海海底下部。隆起脊位于黄河口东部渤海海底,沿NE—SW方向发育,顺隆起脊发育活动断层。

关 键 词:黄河三角洲  卫星遥感  测深  浅地层剖面  钻孔  灾害地质
文章编号:0256-1492(2004)03-0019-09
修稿时间:2003年12月12

COASTAL AND MARINE GEO-HAZARDS IN THE MODERN YELLOW RIVER DELTA
ZHOU Liang-yong.COASTAL AND MARINE GEO-HAZARDS IN THE MODERN YELLOW RIVER DELTA[J].Marine Geology & Quaternary Geology,2004,24(3):19-27.
Authors:ZHOU Liang-yong
Institution:ZHOU Liang-yong~
Abstract:Satellite remote sensing, bathymetry and high-resolution seismic data have been used to examine the marine geo-hazards in the modern Yellow River delta. Trends in the temporal sequence of the coastlines derived from Landsat images were used in the definition of erosional classes of the coastline. Four classes were distinguished, including rapid erosion, moderate erosion, non detectable erosion, and accretion. We revealed the subtle variations in sea floor morphology and sediment geometries using high-resolution acoustic survey. Many kinds of geo-hazards were identified in the active subaqueous delta lobe and abandoned delta lobes. The resultant map of geo-hazards presents the coastline change and distribution of geo-hazards in the Yellow River delta. The shallow geomorphological geo-hazards are distributed in the disturbed area. Evidently the area has changed and the degree of disturb decreased. The gas-charged sediment is mainly distributed in the seabed of the Bohai Sea out of the abandoned delta lobes. The synsedimentary rise outside of the modern river mouth is along the NE-SW direction.
Keywords:geo-hazards  coastal erosion  shallow gas  synsedimentary rise  the Yellow River delta
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