| 辽河三角洲地貌演化(英文) |
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| 引用本文： | 朱龙海,吴建政,徐永臣,胡日军,王楠.辽河三角洲地貌演化(英文)[J].地理学报(英文版),2010,20(1):31-48. |
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| 作者姓名： | 朱龙海 吴建政 徐永臣 胡日军 王楠 |
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| 作者单位： | [1]Key Lab of Submarine Geosciences and Prospecting Techniques, Ministry of Education, Ocean University of China, Qingdao 266100, China [2]College of Marine Geosciences, Ocean University of China, Qingdao 266100, Shandong, China [3]Engineering Survey and Design ＆ Development Institute, Qingdao 266100, Shandong, China |
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| 摘 要： |
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| 关 键 词： | 地貌变化 辽河口 平均沉积速率 悬移质泥沙 海相沉积物 潮汐沉积 Landsat 三角洲沉积 |
| 收稿时间： | 3 January 2006 |
Recent geomorphic changes in the Liaohe Estuary |
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| Longhai?Zhu,Jianzheng?Wu,Yongchen?Xu,Rijun?Hu,Nan?Wang.Recent geomorphic changes in the Liaohe Estuary[J].Journal of Geographical Sciences,2010,20(1):31-48. |
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| Authors: | Longhai Zhu Jianzheng Wu Yongchen Xu Rijun Hu Nan Wang |
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| Institution: | (1) New Ventures Department, Overseas E&;P, Korea National Oil Corporation, 1588-14 Gwanyang-dong, Dongan-gu, 431-711 Anyang, South Korea;(2) Geotechnical Engineering Research Department, Korea Institute of Construction Technology, 411-712 Goyang, South Korea |
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| Abstract: | This paper mainly analyzes the geomorphological changes of the tidal deposition in the Liaohe Estuary based on the multi-year
bathymetric charts in 1990, 1996, 2002 and 2005 and Landsat TM images in 1987, 1994, 2002 and 2005. Evolution of the tidal
depositional system during the past 20 years in the Liaohe River was studied on the basis of 50 boreholes drilling and 30
km shallow stratigraphic exploration from 2002 to 2005. The main tidal depositional body of the modern Liaohe River delta
is located in the Shuangtaizihe Estuary. The stratum within the depth of 10 m includes tidal bank facies, tidal channel facies
and neritic facies with paleo-delta facies underlying them. The sediments of tidal bank facies are mainly composed of sand
and silt with siltation load and suspended load of about 50% respectively in proportion. The sediment of tidal channel facies
and neritic facies is composed of clayey silt and silty clay which belongs to suspended load. The study area was a small bay
between the old Daliaohe River, the old Dalinghe River and the Raoyanghe River complex delta since the Holocene to 1896. Many
tidal banks formed and expanded rapidly after the Shuangtaizihe River was excavated by labor in 1896. The runoff and sediment
discharge have decreased since the construction of brake at the Shuangtaizihe River in 1958.The Shuangtaizihe Estuary is in
the state of deposition as a whole whose tidal bank is increasing and expanding southward, westward and northward. The maximum
expansion speed is 87 to 683 m/a and the mean depositional rate is 0.189 m/a. Erosion occurred in some part of tidal bank
with average erosional rate of 0.122 m/a. The tidal channel was filled up with sediment at a migration speed of 48–200 m/a.
Geomorphologic changes have happened under the combined influences of runoff, ocean dynamics and human activities. The main
source of sediment changes from river sediment to sediment driven by tidal current and longshore current. |
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| Keywords: | Liaohe River delta geomerphology |
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