Monitoring cyanobacteria-dominant algal blooms in eutrophicated Taihu Lake in China with synthetic aperture radar images

Ganlin Wang; Junsheng Li; Bing Zhang; Qian Shen; Fangfang Zhang

doi:10.1007/s00343-015-4019-8

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Monitoring cyanobacteria-dominant algal blooms in eutrophicated Taihu Lake in China with synthetic aperture radar images

OriginalPaper | Updated：2023-05-16

- Monitoring cyanobacteria-dominant algal blooms in eutrophicated Taihu Lake in China with synthetic aperture radar images
- Monitoring cyanobacteria-dominant algal blooms in eutrophicated Taihu Lake in China with synthetic aperture radar images
- 海洋湖沼学报（英文） 2015年33卷第1期页码：139-148
- Affiliations：
  
  1. Key Laboratory of Geographic Information Science for Ministry of Education East China Normal University
  2. Key Laboratory of Digital Earth Science Institute of Remote Sensing and Digital Earth Chinese Academy of Sciences
  3. College of Information Technology Shanghai Ocean University
- Author bio：
- Funds：
  
  Supported by the High Resolution Earth Observation Systems of National Science and Technology Major Projects (No. 05-Y30B02-9001-13/15-5), the National High Technology Research and Development Program of China (Nos. 2012AA12A301, 2013AA12A302), and the Key Basic Research Project of the Science and Technology Commission of Shanghai Municipality (No. 12510502000)
- DOI：10.1007/s00343-015-4019-8
  中图分类号：
- 网络首发：2014-10-21，
  
  纸质出版：2015
- Accepted：
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Monitoring cyanobacteria-dominant algal blooms in eutrophicated Taihu Lake in China with synthetic aperture radar images[J]. 海洋湖沼学报（英文）, 2015,33(1):139-148.

Wang, G., Li, J., Zhang, B. et al. Monitoring cyanobacteria-dominant algal blooms in eutrophicated Taihu Lake in China with synthetic aperture radar images., Chin. J. Ocean. Limnol. 33, 139–148 (2015). https://doi.org/10.1007/s00343-015-4019-8
Monitoring cyanobacteria-dominant algal blooms in eutrophicated Taihu Lake in China with synthetic aperture radar images[J]. 海洋湖沼学报（英文）, 2015,33(1):139-148. DOI： 10.1007/s00343-015-4019-8.

Wang, G., Li, J., Zhang, B. et al. Monitoring cyanobacteria-dominant algal blooms in eutrophicated Taihu Lake in China with synthetic aperture radar images., Chin. J. Ocean. Limnol. 33, 139–148 (2015). https://doi.org/10.1007/s00343-015-4019-8 DOI：

摘要

Abstract

Monitoring algal blooms by optical remote sensing is limited by cloud cover. In this study

synthetic aperture radar (SAR) was deployed with the aim of monitoring cyanobacteria-dominant algal blooms in Taihu Lake in cloudy weather. The study shows that dark regions in the SAR images caused by cyanobacterial blooms damped the microwave backscatter of the lake surface and were consistent with the regions of algal blooms in quasi-synchronous optical images

confirming the applicability of SAR for detection of surface blooms. Low backscatter may also be associated with other factors such as low wind speeds

resulting in interference when monitoring algal blooms using SAR data alone. After feature extraction and selection

the dark regions were classified by the support vector machine method with an overall accuracy of 67.74%. SAR can provide a reference point for monitoring cyanobacterial blooms in the lake

particularly when weather is not suitable for optical remote sensing. Multi-polarization and multi-band SAR can be considered for use in the future to obtain more accurate information regarding algal blooms from SAR data.

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