热带海洋学报 ›› 2013, Vol. 32 ›› Issue (4): 107-112.doi: 10.11978/j.issn.1009-5470.2013.04.016cstr: 32234.14.j.issn.1009-5470.2013.04.016

• 海洋环境保护 • 上一篇    

基于Radarsat-2目标极化分解H-α特征空间的海洋悬浮物浓度监测研究

曹仕1, 2, 刘湘南1, 刘美玲1, 吴伶1, 周博天1   

  1. 1. 中国地质大学(北京)信息工程学院, 北京 100083; 2. 湖南省地质环境监测总站, 湖南 长沙 410000
  • 收稿日期:2011-01-11 修回日期:2011-04-22 出版日期:2013-10-20 发布日期:2013-10-30
  • 通讯作者: 刘湘南。E-mail: liuxncugb@163.com
  • 作者简介:曹仕(1985—), 男, 湖南省岳阳市人, 硕士, 主要研究方向为遥感地学建模。E-mail: caoshi224@163.com.
  • 基金资助:
    国家自然科学基金项目(U0933005)

Monitoring marine suspended particulate matter concentration using full polarimetric SAR data of Radarsat-2

CAO Shi1, 2, LIU Xiang-nan1, LIU Mei-ling1, WU Ling1, ZHOU Bo-tian1   

  1. 1. School of Information Engineering, China University of Geosciences, Beijing 100083, China; 2. Geological Environmental Monitoring Institute of Hunan Province, Changsha 410000, China
  • Received:2011-01-11 Revised:2011-04-22 Online:2013-10-20 Published:2013-10-30

摘要: 海洋悬浮物浓度遥感监测对海洋环境监测与治理具有重要意义。以Radarsat-2全极化SAR(synthetic aperture radar)数据与珠江口东岸香港海域悬浮物实测数据为基础, 利用微波散射机制与Cloude-Pottier理论探索平均散射角α和散射熵H等特征参数与海洋悬浮物浓度之间的关系, 建立基于H-α细分类空间的海洋悬浮物浓度分布监测模型。研究结果表明, 平均散射角α和散射熵H与海洋悬浮物浓度之间存在着正相关关系, 其相关系数分别为0.79和0.88。由此构建的H-α空间细分类模型可将悬浮物浓度分为4类, 分别对应20mg·L-1以上、10—20mg·L-1、5—10mg·L-1以及5mg·L-1以下的悬浮物浓度。经验证, 该模型的分类精度达到95.6%, 远高于单独利用αH的分类效果, 可以较好应用于海洋悬浮物浓度探测领域。

关键词: Radarsat-2, 海洋悬浮物, H-α, 空间分类

Abstract: Remote sensing of marine suspended particulate matter concentration is important for monitoring and managing marine environments. Based on the theory of Cloude-Pottier decomposition and backscattered radiation mechanism, the scattering angle (α) and entropy (H), decomposed from full polarimetric SAR (synthetic aperture radar) data of Radarsat-2, were used to build a model for retrieving suspended particulate matter concentration. The results show good positive relationships between αand the concentration of marine suspended particulate matter and between Hand the concentration, with the coefficients of 0.79 and 0.88, respectively. Four categories of regions are constructed in the H-αspace, corresponding to the concentrations of suspended particulate matter of 20 mg·L-1 and above, 10-20 mg·L-1, 5-10 mg·L-1, and 5 mg·L-1 and below, respectively. The validation shows that the accuracy of the model was up to 95.6% for classifying different concentrations of marine suspended particulate matter, which would be well applied in the field of monitoring marine suspended particulate matter concentration.

Key words: Radarsat-2, marine suspended particulate matter, H-α, spatial classification

中图分类号: 

  • P761