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Proceedings Paper

Detection of narrow open-water channels from JERS-1 SAR images of Amazon forests
Author(s): Takako Sakurai-Amano; Joji Iisaka; Mikio Takagi
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Paper Abstract

We have developed a new, fully automatic method for detecting and visualizing narrow open-water rivers from 3- look JERS-1 SAR images of Amazon rainforests. We expect this method to become an operational tool for detecting river water levels in remote tropical rainforests for the purposes of environmental and disaster monitoring. To demonstrate its use, we apply this method to eight continuous and one isolated Amazon scene. The resulting approximate range of waterways corresponds highly with those seen in JERS-1 VNIR image data observed one week later in cloud-free areas. Estimates from the optical JERS-1 VNIR images give the minimum detectable width of those visualized rivers to be approximately 20 m. The brightness of the river can be used to estimate the width of the fiver from approximately 20m to approximately 150m. In wider rivers, dark areas become predominant.

Paper Details

Date Published: 21 December 2000
PDF: 11 pages
Proc. SPIE 4152, Microwave Remote Sensing of the Atmosphere and Environment II, (21 December 2000); doi: 10.1117/12.410589
Show Author Affiliations
Takako Sakurai-Amano, National Space Development Agency of Japan (Japan)
Joji Iisaka, Natural Resources Canada (Canada)
Mikio Takagi, Science Univ. of Tokyo (Japan)

Published in SPIE Proceedings Vol. 4152:
Microwave Remote Sensing of the Atmosphere and Environment II
Thomas T. Wilheit; Harunobu Masuko; Hiroyuki Wakabayashi, Editor(s)

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