| 基于GIS的长江河口没冒沙动态演变及稳定性分析 |
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| 引用本文： | 左书华,李九发,时连强,应铭,徐海根.基于GIS的长江河口没冒沙动态演变及稳定性分析[J].地理科学,2007,27(5):701-706. |
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| 作者姓名： | 左书华 李九发 时连强 应铭 徐海根 |
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| 作者单位： | 1. 交通部天津水运工程科学研究所工程泥沙交通行业重点实验室 天津 塘沽 300456;2. 华东师范大学河口海岸学国家重点实验室 上海 200062;3. 国家海洋局第二海洋研究所 浙江 杭州 310012 |
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| 摘 要： | 根据该海区近百年来各个时期海图资料,运用Mapinfo软件分析没冒沙的形成及形成后的演变过程。结果表明:没冒沙的形成和发育经历了局部边滩冲刷、边滩沙嘴发育和沙脊形成三个阶段;无论是其横断面变化,还是平面变化,均反映了其沙头部位冲刷下移(但其移动距离不大);近半个世纪来,沙体中轴位置在稳定强劲的涨落潮流作用下呈现出西北-东南走向,位置基本不变,形态变化不大,其冲淤量在1959年后变化很小,0m沙体变化基本不变,-2m沙体略有冲刷,冲刷量为0.07×106m3/a,反映出没冒沙稳定性比较好。
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| 关 键 词： | 长江河口 没冒沙 Mapinfo软件 演变 |
| 文章编号： | 1000-0690（2007）05-0701-06 |
| 收稿时间： | 2006-04-13 |
| 修稿时间： | 2006-08-11 |
GIS-based Analysis on Evolutional Process and Stability of Meimaosha Shoal in the Changjiang River Estuary |
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| ZUO Shu-Hua,LI Jiu-Fa,SHI Lian-Qiang,YING Ming,XU Hai-Gen.GIS-based Analysis on Evolutional Process and Stability of Meimaosha Shoal in the Changjiang River Estuary[J].Scientia Geographica Sinica,2007,27(5):701-706. |
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| Authors: | ZUO Shu-Hua LI Jiu-Fa SHI Lian-Qiang YING Ming XU Hai-Gen |
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| Institution: | 1. Tianjin Research Institute of Water Transport Engineering Key Laboratory of Engineening Sediment of Ministry of Communications, Tianjin Research Institute of Water Transport Engineering, Tianjin 300456;2. State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062;3. The Second Institute of Oceanography, Hangzhou, Zhejiang 310012 |
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| Abstract: | Making clear the evolutional process of Meimaosha shoal in the Changjiang(Yangtze) River estuary can provide scientific basis for the construction of a reservoir between the sand ridge and the river bank.Supported by GIS software,15 pieces of charts of the Meimaosha shoal of the South Passage of the Changjiang River etuary were studied.The formation history and evolutional process of the Meimaosha shoal were discussed by the multi-methods.The results showed that,the form and growth of the Meimaosha shoal had undergone three phases which are erosion of local beach,growth of spit and form of sand ridge;the Meimaosha shoal had the character of tidal sand ridge as its middle axes had taken on a good stability along northwest to southeast under the action of steady and driving flood and ebb tides in the passed half century.After 1959,the deposition and erosion of sediment changed very slightly.The volume of 0m sand body change basic invariable,sand body of-2m had been slightly washed out with the erosion rate of 0.07?106m3/a,reflecting the Meimaosha shoal stability is quite good. |
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| Keywords: | GIS |
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