| 河北南堡-曹妃甸海域潜在的浅表灾害地质类型及特征 |
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| 引用本文： | 刘晓东,傅命佐,李萍,高珊,刘乐军.河北南堡-曹妃甸海域潜在的浅表灾害地质类型及特征[J].海洋学报,2014,36(7):90-98. |
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| 作者姓名： | 刘晓东 傅命佐 李萍 高珊 刘乐军 |
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| 作者单位： | 国家海洋局 第一海洋研究所, 山东 青岛 266061;国家海洋局 第一海洋研究所, 山东 青岛 266061;国家海洋局 第一海洋研究所, 山东 青岛 266061;国家海洋局 第一海洋研究所, 山东 青岛 266061;国家海洋局 第一海洋研究所, 山东 青岛 266061 |
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| 基金项目： | 国家908专项——河北南堡-曹妃甸海域环境地质与灾害地质补充调查与研究（908-01-BC16）；国家海洋公益性行业科研专项资助——我国典型海岛地质灾害监测及预警示范研究（201005010）。 |
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| 摘 要： | 利用2~7kHz浅地层剖面探测、多波束、单波束水深数据以及侧扫声纳勘测影像等地质地球物理实测数据,分析研究了河北南堡-曹妃甸海域各种潜在的地质灾害类型,编制了该海域的灾害地质图与海底地貌图。并在前人对海岸带灾害地质类型分类的基础上,对该海域的潜在的灾害地质类型进行了分类。对海底浅层气、活动沙波、海底侵蚀、活动断裂、埋藏斜层、陡坡、陡坎以及沟槽等与近海海洋工程密切相关的灾害类型的空间分布特征深入研究。研究结果显示:调查区海域的潜在地质灾害因素分布较为集中,多发育在缓斜的水下侵蚀堆积岸坡与陡斜的水下侵蚀岸坡分界线附近,浅层气,陡坡陡坎以及沟槽都有发育;在陆架侵蚀洼地区,发育有较大规模的沟槽,海底侵蚀现象也是较为普遍;调查区其他海域,灾害类型较少,局部发育有活动沙波和埋藏斜层等。
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| 关 键 词： | 南堡-曹妃甸 地质灾害 分布特征 |
| 收稿时间： | 2012/12/20 0:00:00 |
| 修稿时间： | 2013/10/25 0:00:00 |
Types and characteristics of potential geohazards in the sea area near Nanpu-Caofeidian,Hebei Province |
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| Liu Xiaodong,Fu Mingzuo,Li Ping,Gao Shan and Liu Lejun.Types and characteristics of potential geohazards in the sea area near Nanpu-Caofeidian,Hebei Province[J].Acta Oceanologica Sinica (in Chinese),2014,36(7):90-98. |
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| Authors: | Liu Xiaodong Fu Mingzuo Li Ping Gao Shan and Liu Lejun |
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| Institution: | First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China;First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China |
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| Abstract: | Based on the geological and geophysical data,including shallow stratigraphic profiles,multibeam and single-beam bathymetric data,and sidescan sonar photographs,the potential geohazards in the sea area near Nanpu-Caofeidian,Hebei Province were analysed and classified,the geohazard map and geomorphologic map of the study area are compiled,and studied the spatial distribution characteristics of the geohazards which are closely related to marine engineering,such as shallow gas,active sand waves,seafloor erosion,active fault,buried cross-bedded sand layers,steep slopes,steep scarps and grooves,are examined. The shallow gas,steep slopes and scarps are usually developed near the boundary between the gentle erosive-accumulative nearshore slope and steep erosive nearshore slope. Large-scales grooves and seafloor erosion are usually distributed in erosive shelf depression. In the other parts of the study area,geohazard types are less discovered,while active sand waves and buried cross-bedded sand layers are local found in the shelf area. |
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| Keywords: | Nanpu-Caofeidian geohazards distribution characteristics |
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