| Evolution history and trend of the modern Huanghe River Delta |
| |
| 作者姓名： | MA Yanyan LI Guangxue |
| |
| 作者单位： | College of Marine Geosciences,Ocean University of China,Qingdao 266100,China;Key Laboratory of Submarine Geosciences and Prospecting Techniques of Ministry of Education,Qingdao 266100,China |
| |
| 基金项目： | The National Basic Research Program of China under contract No. 2005CB422304. |
| |
| 摘 要： | The evolvement history of modern Huanghe River Delta tidal flat, coastline and underwater terrain were studied based on the analysis of remote sensing images and water depth data. Based on the analysis of seafloor terrain evolution on different historical stages, a formula simulating the erosion and deposition evolvement model of subaqueous Huanghe River Delta slope was proposed, and the evolvement trend of the subaqueous delta terrain was predicted. The result shows that the equilibrium transition zone is near the water depth of 12 m with seabed erosion in shallower water and accumulation in deeper water during the first 150 a after the river channel was deserted. In the meantime, the underwater slope became gentler and the coastal erosion rate became slow gradually. Then, the subaqueous delta slope changed to up concave from upper convex, and the shape of subaqueous delta disappeared. The coast type changed to silt-mud coast about 100-150 a after the river course was deserted. The erosion depth in the foot of the seawall is calculated based on the formula.
|
| 关 键 词： | 现代黄河三角洲 演化历史 水下三角洲 水下地形 演变趋势 河道淤泥 海岸线 侵蚀率 |
| 收稿时间： | 31 December 2007 |
| 修稿时间： | 4/7/2009 12:00:00 AM |
Evolution history and trend of the modern Huanghe River Delta |
| |
| MA Yanyan,LI Guangxue.Evolution history and trend of the modern Huanghe River Delta[J].Acta Oceanologica Sinica,2010,29(2):40-52. |
| |
| Authors: | MA Yanyan and LI Guangxue |
| |
| Institution: | College of Marine Geosciences, Ocean University of China, Qingdao 266100, China;Key Laboratory of Submarine Geosciences and Prospecting Techniques of Ministry of Education, Qingdao 266100, China |
| |
| Abstract: | The evolvement history of modern Huanghe River Delta tidal flat, coastline and underwater terrain
were studied based on the analysis of remote sensing images and water depth data. Based on
the analysis of seafloor terrain evolution on different historical stages, a formula simulating the
erosion and deposition evolvement model of subaqueous Huanghe River Delta slope was proposed,
and the evolvement trend of the subaqueous delta terrain was predicted. The result shows that
the equilibrium transition zone is near the water depth of 12 m with seabed erosion in shallower
water and accumulation in deeper water during the first 150 a after the river channel was deserted.
In the meantime, the underwater slope became gentler and the coastal erosion rate became slow
gradually. Then, the subaqueous delta slope changed to up concave from upper convex, and the
shape of subaqueous delta disappeared. The coast type changed to silt-mud coast about 100-150 a
after the river course was deserted. The erosion depth in the foot of the seawall is calculated based
on the formula. |
| |
| Keywords: | modern Huanghe River Delta coast evolvement scour depth in the foot of seawall |
| 本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录！ |
| 点击此处可从《海洋学报(英文版)》浏览原始摘要信息 |
| 点击此处可从《海洋学报(英文版)》下载免费的PDF全文 |
