|
|||||
|
|
| 长江口横沙东滩近30年来自然演变及工程影响的GIS分析 | |
| 引用本文： | 杜景龙,姜俐平,杨世伦.长江口横沙东滩近30年来自然演变及工程影响的GIS分析[J].海洋通报,2007,26(5):43-48. |
| 作者姓名： | 杜景龙 姜俐平 杨世伦 |
| 作者单位： | 1. 华东师范大学河口海岸国家重点实验室,上海,200062;苏州科技学院城市与环境学系,江苏,苏州,215011 2. 苏州科技学院城市与环境学系,江苏,苏州,215011 3. 华东师范大学河口海岸国家重点实验室,上海,200062 |
| 基金项目： | 华东师范大学校科研和教改项目 , 国家重点基础研究发展计划(973计划) , 国家自然科学基金 |
| 摘 要： | 利用长江口深水航道治理一、二期工程实施前后的地形资料,在GIS软件及相关的统计分析软件的支持下,分析了治理工程对横沙东滩冲淤演变的影响。结果表明:横沙东滩在长期的自然演变过程中滩地面积相对稳定,但20世纪90年代中期以来,由于长江来沙量减少,滩地面积出现减小的趋势;深水航道北导堤工程(1998—2000年5月)使横沙东滩的冲淤形势发生了较大的变化:横沙东滩窜沟扭曲、萎缩,白条子沙及其以东浅水区域淤积加剧;促淤工程实施后,形成了一个有利泥沙沉积的环境,过境泥沙的大量淤积及人工吹泥上滩使得横沙东滩淤长速度显著加快。 |
| 关 键 词： | 横沙东滩 北槽 深水航道工程 冲淤演变 |
| 文章编号： | 1001-6932（2007）05-0043-0006 |
| 修稿时间： | 2006-10-08 |
GIS Analysis of the Natural Evolvement of the Hengsha East Shoal of the Yangtze River and the Infects of Projects in the Last Thirty Years |
|
| DU Jinglong,JIANG Liping,YANG Shilun.GIS Analysis of the Natural Evolvement of the Hengsha East Shoal of the Yangtze River and the Infects of Projects in the Last Thirty Years[J].Marine Science Bulletin,2007,26(5):43-48. | |
| Authors: | DU Jinglong JIANG Liping YANG Shilun |
| Abstract: | Based on the topographic materials collected before and after the first and second phases of the project that was aimed at improving the deep-water channel of the North Passage of the Yangtze River, this paperanalyzed the influence of the project on the erosion-accretion evolution of the Hengsha East Shoal, supported by the GIS and relative statistic software. The results show that the area of the Hengsha East Shoal has leveled off in the process of the natural evolvement, but since the last five years of 1990s, there has been a tendency for the shoal to decrease due to the decline of bedload from the Yangtze River. The north bank project of the deep-water channel has brought great changes to the erosion-accretion situation of the Hengsha East Shoal. The tidal channel of the Hengsha East Shoal became contorted and shrank; the Baitiaozi shoal and some low-water areas to its east accumulated sharply. With the siltation-promoting project brought into effect, conditions for silting are formed in Hengsha East Shoal. The siltation of the bedload flowing through this area and artificially blowing mud up to the shoal make the erosion of the Hengsha East Shoal speed up remarkably. |
| Keywords: | Hengsha East Shoal North Passage deep-water channel erosion-accretion evolution |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |