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遥感技术与应用  2006, Vol. 21 Issue (6): 497-501    DOI: 10.11873/j.issn.1004-0323.2006.6.497
研究与应用     
闽江流域福州段悬浮物浓度的遥感分析
叶 琳, 徐涵秋

(福州大学环境与资源学院数据挖掘与信息共享教育部重点实验室, 福建福州 350002)
Remote Sensing Analysis of Suspended Sediment Concentration Variation of the Lower Min River (Fuzhou Portion) in Fujian of China
YE Lin, XU Han-qiu
(College of Environment and Resources; Key Laboratory of Data Mining and Information Sharing ,State Ministry of Education, Fuzhou University , Fuzhou 350002, China)
 全文: PDF 
摘要:

利用1996 年和2003 年两个时相的卫星遥感影像, 对闽江流域福州段的悬浮物浓度进行了反演和评估。利用斜率法反演了水体的悬浮物浓度, 并通过制作密度分割图和差值影像图来直观地反映1996 年到2003 年水体悬浮物浓度在时间和空间上的分布变化。研究结果显示, 2003 年闽江流域福州段的悬浮物浓度几乎在整个河段比1996 年有较大幅度的上升。对比上游水质, 可以判断悬浮物浓度上升的主要原因是由于上游泥沙携带量增多而引起的。随着近年来福州城市化的快速发展, 城市工业废水和生活污水的排放量增加也是部分原因之一。

关键词: 遥感闽江悬浮物浓度变化检测 斜率法    
Abstract:

The human-induced water-quality problem has long been concent rated and intensively studied all over the world. The Min River is the major river system in Fujian province of Southeast China, which runs across the center of the province from west to east and is called“Mother River”of the province because it provides the drinking water for the 1/3 of the provincial population. How ever, the water quality of the river has being threatened due to the human activities in the  adjacent areas. Therefore, the change of the river water quality needs to be understand for the further protection. Nowadays, there are many methods to study water quality, among which the remote sensing technology is a valuable one employed recently especially in studing historical change of the water quality when the ground-based water measurement data are not available. Therefore, two Landsat TM /ETM + images of 1996 and 2003 have been used in this study to estimate suspended sediment concent ration ( SSC ) and its variation of the lower stream ( Fuzhou portion) of the Min River during the study period. A series of image pre-preccessing methods were first applied to the two raw images, including radiomet rical correction and image rectification. Then the open water-covered areas were extracted form the images using the Modified Normalised Difference Water Index (MNDWI). Finally, the slope method proposed by Lietal. (1999) was used to estimated the SSC of the studied river portion. Moreover, the SSC maps of the two study years were further subdivided into 4 concentration-levels using the density slicing technique. So a change detection method could be used to detect spatial and temporal variations of the SSC of the studied river portion during the years from 1996 to 2003.The results reveal that the SSCs have gone up during the 7 study years almost in the whole studied river portion. Comparing with the upper stream of the river, we found that the increase in the SSC was due largely to the heavy suspended sediment loads from the upper river with the contribution of the increasing
amount of industrial waste water and civil sewage because of fast urbanization of the Fuzhou City.

Key words:  Remote sensing    Min River    Suspended sediment concentration    Change detection    Slopemethod
收稿日期: 2005-10-21 出版日期: 2011-09-27
:  TP 79   
基金资助:

国家自然科学基金资助项目(40371107) , 福建省教育厅重点项目(811557)。

作者简介: 叶琳(1984- ) , 女, 硕士研究生, 主要从事水质遥感方面的研究。
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引用本文:

叶 琳, 徐涵秋. 闽江流域福州段悬浮物浓度的遥感分析[J]. 遥感技术与应用, 2006, 21(6): 497-501.

YE Lin, XU Han-qiu. Remote Sensing Analysis of Suspended Sediment Concentration Variation of the Lower Min River (Fuzhou Portion) in Fujian of China. Remote Sensing Technology and Application, 2006, 21(6): 497-501.

链接本文:

http://www.rsta.ac.cn/CN/10.11873/j.issn.1004-0323.2006.6.497        http://www.rsta.ac.cn/CN/Y2006/V21/I6/497

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