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Open AccessArticle

SAR and Lidar Temporal Data Fusion Approaches to Boreal Wetland Ecosystem Monitoring

1
Alberta Environment and Parks, Government of Alberta, 9920 108 Street, Edmonton, AB T5K 2M4, Canada
2
Department of Geography, University of Lethbridge, 4401 University Dr. W, Lethbridge, AB T1K6T5, Canada
3
Natural Resources Canada, Government of Canada, 560 Rochester St., Ottawa, ON K1A 0E4, Canada
4
Department of Biological Sciences, University of Alberta, Edmonton, AB T6G 2E9, Canada
*
Author to whom correspondence should be addressed.
Remote Sens. 2019, 11(2), 161; https://doi.org/10.3390/rs11020161
Received: 25 October 2018 / Revised: 21 December 2018 / Accepted: 4 January 2019 / Published: 16 January 2019
(This article belongs to the Special Issue Data Fusion for Improved Forest Inventories and Planning)
The objective of this study was to develop a decision-based methodology, focused on data fusion for wetland classification based on surface water hydroperiod and associated riparian (transitional area between aquatic and upland zones) vegetation community attributes. Multi-temporal, multi-mode data were examined from airborne Lidar (Teledyne Optech, Inc., Toronto, ON, Canada, Titan), synthetic aperture radar (Radarsat-2, single and quad polarization), and optical (SPOT) sensors with near-coincident acquisition dates. Results were compared with 31 field measurement points for six wetlands at riparian transition zones and surface water extents in the Utikuma Regional Study Area (URSA). The methodology was repeated in the Peace-Athabasca Delta (PAD) to determine the transferability of the methods to other boreal environments. Water mask frequency analysis showed accuracies of 93% to 97%, and kappa values of 0.8–0.9 when compared to optical data. Concordance results comparing the semi-permanent/permanent hydroperiod between 2015 and 2016 were found to be 98% similar, suggesting little change in wetland surface water extent between these two years. The results illustrate that the decision-based methodology and data fusion could be applied to a wide range of boreal wetland types and, so far, is not geographically limited. This provides a platform for land use permitting, reclamation monitoring, and wetland regulation in a region of rapid development and uncertainty due to climate change. The methodology offers an innovative time series-based boreal wetland classification approach using data fusion of multiple remote sensing data sources. View Full-Text
Keywords: SAR; Lidar; boreal wetlands; data fusion; decision-based methodology; time series SAR; Lidar; boreal wetlands; data fusion; decision-based methodology; time series
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MDPI and ACS Style

Montgomery, J.; Brisco, B.; Chasmer, L.; Devito, K.; Cobbaert, D.; Hopkinson, C. SAR and Lidar Temporal Data Fusion Approaches to Boreal Wetland Ecosystem Monitoring. Remote Sens. 2019, 11, 161.

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