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TitleA Collection of SAR Methodologies for Monitoring Wetlands
AuthorWhite, L; Brisco, B; Daboor, M; Schmitt, A; Pratt, A
SourceRemote Sensing 7, 6, 2015 p. 7615-7645, Open Access logo Open Access
Alt SeriesEarth Sciences Sector, Contribution Series 20150394
PublisherMDPI AG
Mediapaper; on-line; digital
File formatpdf
NTS84I; 84P
Lat/Long WENS-112.0000 -110.0000 60.0000 58.0000
Subjectsregional geology; surficial geology/geomorphology; Nature and Environment; wetlands; radar methods; radar probes; radar imagery; soils; vegetation; mapping techniques; flora; remote sensing; satellite imagery
Illustrationsgraphs; diagrams; location maps; Landsat images; tables; photographs
ProgramRemote Sensing Science
Released2015 06 09
AbstractWetlands are an important natural resource that needs to be protected. One of the first steps in environmental monitoring is to determine the quantity and location of that resource. Synthentic Aperature Radar (SAR) can help answer these questions by mapping and monitoring change in surface water, flooded vegetation, and changes from one land cover class to another within a wetland. This paper will review some commonly used techniques such as grey-level thresholding to map surface water and polarimetric decompositions to map flooded vegetation and changes from one land cover class to another. The Curevlet-based change detection and the Wishart-Chernoff Distance method, which are not as well known, will be introduced and used to demonstrate the ability to improve flooded vegetation mapping and to flag areas of change respectively. We recommend that due to reliability of acquiring SAR data and its proven ability to map various components of a wetland demonstrate that it should be included as part of a wetland monitoring system together with other sources of data, for example optical imagery.
Summary(Plain Language Summary, not published)
Wetlands are an important part of Canada's natural landscape. However, they are declining due to stresses from a variety of factors including climate change, industrial practices and conversion to agriculture or urban areas. To help monitor and preserve wetlands, an inventory which maps the location and the dynamic seasonal and annual changes is needed. Synthetic Aperture Radar (SAR), such as that onboard Canada's RADARSAT-2 satellite, can provide important information to such an inventory. This paper provides an overview of some SAR methods well-suited to mapping and monitoring various aspects of wetlands; specifically, surface water, flooded vegetation and flagging areas of wetland change. These methodologies are presented through case studies from several field sites at different locations. The results demonstrate that SAR data can be used to effectively map important aspects of wetlands, and should be considered as a critical component of a wetland monitoring system.

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