| 磨刀门河口近期演变及其排洪效应 |
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| 引用本文： | 王世俊,胡达,李春初.磨刀门河口近期演变及其排洪效应[J].海洋通报,2006,25(2):21-26. |
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| 作者姓名： | 王世俊 胡达 李春初 |
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| 作者单位： | 1. 中山大学地理科学与规划学院河口海岸研究所,广东,广州,510275;珠江水利科学研究院河口海岸动力学研究室,广东,广州,510610
2. 中山大学地理科学与规划学院河口海岸研究所,广东,广州,510275 |
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| 摘 要： | 通过分析珠江磨刀门分流河口水动力结构及拦门沙的走向变化,解析磨刀门河口近期演变,并从河口的结构和功能的角度,分析磨刀门河口的排洪功能和行为。结论认为:(1)磨刀门河口正由径流优势型向河流—波浪型转变,波浪成为改造和修饰口门地形的重要动力;(2)磨刀门河口的动力、地貌变化,使得河口对淡水的防御性增强而渗透性减弱,其排洪潜力有限;(3)强径流河口发育支汊是河口延伸中的基本规律,在今后磨刀门的治理开发过程(尤其是排洪)中应注意支汊的保护利用。
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| 关 键 词： | 磨刀门 河口演变 排洪功能 水动力变化 |
| 文章编号： | 1001-6392（2006）02-0021-06 |
| 收稿时间： | 2005-03-14 |
| 修稿时间： | 2005-03-142005-12-04 |
The Recent Evolution of Modaomen Estuary and its Effect on Flood Drainage |
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| WANG Shijun,HU Da,LI Chunchu.The Recent Evolution of Modaomen Estuary and its Effect on Flood Drainage[J].Marine Science Bulletin,2006,25(2):21-26. |
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| Authors: | WANG Shijun HU Da LI Chunchu |
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| Institution: | 1.Institute of Estuarine and Coastal Research, School of Geography and Planning, Zhongshan University, Guangzhou 510275 Guangdong, China; 2.Estuarine and Coastal Hydrodynamic Section, Pearl River Hydraulic Research Institute, Guangzhou 510610, Guandong, China |
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| Abstract: | Based on the describing of the hydrodynamic structure and sand bar development trend of the Modaomen estuary, of the earl River, we analyzed its recent evolution , and linked its environmental effects with flood drainage imperilment to deduct the estuarine interfacial function and behavior of flood drainage. The results show that: ( 1 ) the dynamical interface of Modaomen estuary is transiting from the river-dominated dynamic to the combined control of river dynamic and wave dynamic, and the wave dynamic becomes an important factor that reconstructs and modifies the entrance bar; ( 2 ) the changes of dynamics and geomorphology in the Modaomen estuary strengthened the defense capability while weakening the permeability of estuarine interface for the freshwater. Thus , the potential of flood drainage of Modaomen estuary is limited; ( 3 ) The developing branch is a natural law in the river-dominated estuarys extension to the ocean, and the branch is in favor of flood drainage for the estuary. So it should be fully considered to protect the branch during the exploitation in future. |
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| Keywords: | Modaomen estuarine evolution function of flood drainage hydrodynamic change |
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