| 巩彩兰,恽才兴.应用地理信息系统研究长江口南港底沙运动规律[J].水利学报,2002,33(4):0018-0022 |
| 应用地理信息系统研究长江口南港底沙运动规律 |
| Investigation on sediment transport in south channel of Yangtze River estuary by means of GIS technology |
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| DOI： |
| 中文关键词: 地理信息系统 长江口南港 底沙运动 冲淤变化 |
| 英文关键词: GIS,Yangtze River estuary south channel,bedload sediment transport,variation of erosion and deposition |
| 基金项目: |
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| 摘要点击次数: 1905 |
| 全文下载次数: 86 |
| 中文摘要: |
| 利用地理信息系统软件强大的数据输入和空间数据分析功能，将长江口南港1988年至2000年的海图数字化，通过最小距离内插得到栅格水深图，并且通过相邻两年海图对应位置水深值相减，得到河床冲淤变化图，在此基础上定量分析成形沙体的特征，河道容积变化、河道淤积部位和底沙输移路线、预测下一年河道淤积部位、输沙率等。研究表明GIS技术是定量研究底沙运动的一种有效手段，长江口南港近12年内河道发生淤积，底沙主要来自洪水和落潮流冲刷上游河床底部，再在下游堆积形成新的淤积体。长江口南港底沙输移趋势以进入下游南槽为主，少量进入北槽。 |
| 英文摘要: |
| Based on the powerful GIS software including Arcinfo, Arcvew and ENVI, which can be used as data input, image visualization, map analysis and computing and map output, the charts of the south channel of the Yangtze River estuary from 1988 to 2000 are digitalized. The grid maps and digital erosion and deposition variation maps of the riverbed are obtained, the probable locationand depth of the silting are forecasted. The erosion and deposition map shows that the south channel is deposited in recent 12 years, the sediment mainly comesfrom the upstream and enters the south passage. |
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