Special Section on Remote Sensing for Investigating the Coupled Biogeophysical and Biogeochemical Process of Harmful Algal Blooms

Synthetic aperture radar detection and characteristic analysis of cyanobacterial scum in Lake Taihu

[+] Author Affiliations
Ganlin Wang

Shanghai Ocean University, College of Information Technology, Nanhui New City, Shanghai, China

Junsheng Li, Bing Zhang, Fangfang Zhang, Qian Shen

Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Haidian District, Beijing, China

Zhiqiang Cai

Changzhou University, School of Pharmaceutical Engineering and Life Science, Changzhou, Jiangsu, China

J. Appl. Remote Sens. 11(1), 012006 (Mar 15, 2017). doi:10.1117/1.JRS.11.012006
History: Received June 7, 2016; Accepted February 28, 2017
Text Size: A A A

Abstract.  To compensate for the limitations of optical remote sensing when restricted by cloud cover, it is worth exploring how to detect cyanobacterial blooms using synthetic aperture radar (SAR), which can penetrate clouds. A satellite–ground synchronous experiment was conducted in Lake Taihu, the third largest freshwater lake in China. A lipopeptide biosurfactant was detected in the algal scum layer, with an average content of 1.8  g/L. The viscosity (1.41 to 332 mPa.s) of the scum was significantly higher than that of scum-free water. The surface tension of the algal scum decreased by 12.5%, and the SAR microwave backscatter was reduced by 7.3 dB. This indicated that the cyanobacterial scum could effectively attenuate capillary waves and appear as dark patches in SAR images. SAR has the potential to be developed as a tool for the remote sensing of algal scum in lake waters.

Figures in this Article
© 2017 Society of Photo-Optical Instrumentation Engineers

Citation

Ganlin Wang ; Junsheng Li ; Bing Zhang ; Zhiqiang Cai ; Fangfang Zhang, et al.
"Synthetic aperture radar detection and characteristic analysis of cyanobacterial scum in Lake Taihu", J. Appl. Remote Sens. 11(1), 012006 (Mar 15, 2017). ; http://dx.doi.org/10.1117/1.JRS.11.012006


Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging & repositioning the boxes below.

Related Book Chapters

Topic Collections

PubMed Articles
Advertisement
  • Don't have an account?
  • Subscribe to the SPIE Digital Library
  • Create a FREE account to sign up for Digital Library content alerts and gain access to institutional subscriptions remotely.
Access This Article
Sign in or Create a personal account to Buy this article ($20 for members, $25 for non-members).
Access This Proceeding
Sign in or Create a personal account to Buy this article ($15 for members, $18 for non-members).
Access This Chapter

Access to SPIE eBooks is limited to subscribing institutions and is not available as part of a personal subscription. Print or electronic versions of individual SPIE books may be purchased via SPIE.org.