IEEE Geoscience and Remote Sensing Magazine - March 2020 - 120

©ISTOCKPHOTO.COM/THIAGO SANTOS

HYONGKI LEE,
TING YUAN,
HANWEN YU, AND
HAHN CHUL JUNG

Interferometric
SAR for Wetland
Hydrology
An overview of methods, challenges, and trends

S

ince 2000, interferometric synthetic-aperture radar
-(InSAR) has been an effective tool to map 2D water-level
changes beneath vegetated wetlands with a high spatial resolution and centimetric accuracy. In the last two decades, SAR
images obtained from different wavelengths and polarization modes have been tested across various wetland systems,
and InSAR-derived water-level-change maps have improved
Digital Object Identifier 10.1109/MGRS.2019.2958653
Date of current version: 31 January 2020

120

0274-6638/20©2020IEEE

our understanding of wetland hydrology and hydraulics. In
this article, we discuss the feasibility and challenges of applying InSAR to wetland areas, present a comprehensive review
of InSAR applications for hydraulic and hydrologic analysis,
and discuss future trends.
BACKGROUND
Wetlands are transitional regions between terrestrial and
aquatic systems and play an essential role in global hydrological and biogeochemical cycles [1]. They also offer many
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MARCH 2020



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IEEE Geoscience and Remote Sensing Magazine - March 2020

Table of Contents for the Digital Edition of IEEE Geoscience and Remote Sensing Magazine - March 2020

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