热带海洋学报 ›› 2009, Vol. 28 ›› Issue (5): 43-48.doi: 10.11978/j.issn.1009-5470.2009.05.043

• 海洋物理学 • 上一篇    下一篇

利用混合光谱分解估测珠江口悬浮泥沙浓度

 刘大召1,2,3 , 陈楚群2 , 刘汾汾2, 弓洁琼2    

  1. 1.广东海洋大学,广东 湛江 524088 ;
    2.中科院南海海洋研究所热带环境与动力重点实验室,广东 广州 510301
    3.中国科学院研究生院,北京,100864
  • 收稿日期:2008-11-08 修回日期:2009-02-27 出版日期:2009-11-10 发布日期:2009-10-10
  • 作者简介:刘大召, 男,在读博士研究生,主要研究方向为海洋遥感图像处理
  • 基金资助:

    广东省自然科学基金重点项目(06105018);国家海洋局公益性行业科研专项(200805028)

Estimation of suspended sediment concentration at Zhujiang River Mouth based on decomposition of mixing spectrum

LIU Da-zhao1,2,3, CHEN Chu-qun1, LIU Fen-fen 1, GONG Jie-qiong1   

  1. 1. Key Laboratory of Environment Dynamics, South China Sea Institute of Oceanology, CAS, Guangzhou 510301 China;
    2. Guangdong Ocean University, Zhanjiang 524088, China;
    3. Graduate Univ. of Chinese Academy of Sciences, Beijing 100864, China
  • Received:2008-11-08 Revised:2009-02-27 Online:2009-11-10 Published:2009-10-10
  • About author:刘大召, 男,在读博士研究生,主要研究方向为海洋遥感图像处理
  • Supported by:

    广东省自然科学基金重点项目(06105018);国家海洋局公益性行业科研专项(200805028)

摘要:

利用遥感技术估测水体中的悬浮泥沙的浓度已经成为一门成熟的技术,但将其应用于河口地区悬浮泥沙的监测仍然存在一些限制。限制之一是遥感数据(例如MODIS)的空间分辨率太低,不适合应用于河口等狭小水域的监测。相比较而言,Hyperion高光谱遥感数据有196个波段,覆盖400-2500nm的光谱范围,光谱分辨率为10nm,空间分辨率为30m,其高光谱分辨率及高空间分辨率,显示了其在河口水体悬浮泥沙遥感中的巨大潜力。利用2006年12月4号的Hyperion数据、同步实测的高光谱数据及悬浮泥沙浓度数据,对珠江口海域悬浮泥沙浓度进行了研究。利用混合光谱分解模型计算了珠江口悬浮泥沙浓度的分布。分析结果表明,混合光谱分解模型可以作为遥感监测水体悬浮泥沙浓度的定量模型。

关键词: 珠江口, Hyperion, 悬浮泥沙

Abstract:

Although there has some been effort to retrieve suspended sediment concentration (SSC) by using remote sensing data, there are some limitations for the application of this technology in estuary waters partly due to the low spatial resolution of remote sensing data, such as the Moderate Resolution Imaging Spectroradiometer data. By comparison, the EO-1 Hyperion instrument, which is capable of resolving 196 spectral bands over the range of 400–2500 nm, with 10-nm wide band and 30-m spatial resolution, has a great potential in studying suspended sediments in estuaries. The authors study the SSC at the Zhujiang River Mouth using the Hyperion images obtained on December 4, 2006, along with the real time remote sensing reflectance. The results show that the mixing spectral decomposition model is a good choice for estimating the SSC using remote sensing data.

Key words: Zhujiang River Mouth, Hyperion, suspended sediment

中图分类号: 

  • P731.14