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Summary of Proposal HYD2160

TitleEvaluating TSX/RS2 products to provide specific river ice mapping solutions to hydroelectricity producers
Investigator Roth, Achim - DLR, DFD
Team Member
Dr. Gauthier, Yves - INRS, Centre Eau, Terre et Environnement
Mr. Jasek, Martin - BC Hydro, -
Mr. Dolbec, Jean-François - Hydro-Québec, -
Mr. Hardy, Stéphane - Dromadaire Géo-Innovations inc., -
Prof. Bernier, Monique - INRS , Centre Eau, Terre, Environnement
Mrs. Los, Helena - Warsaw University of Technology, Department of Photogrammetry, Remote Sensing and GIS
SummaryThe monitoring of freeze-up and break-up of ice is important to help manage flow releases from hydro electric generation facilities as they can influence the risk of ice jam related flooding, even up to several 100s of kms downstream of the dams.
Usually the river ice conditions in remote locations are monitored by aircraft. More recently the capabilities of earth observation data for this purpose have been investigated. Low resolution optical data but also SAR data were used for this purpose. INRS together with BC Hydro studied the freeze-up on the Peace River in Alberta using RADARSAT-2 and MODIS data. INRS developed an automated ice mapping procedure based on SAR data. It is based on single polarized data but was modified to support intensity and texture measures of the individual polarization channels of quad-polarized RADARSAT-2 data.
DLR has developed a new SAR post processing system that aims at an improved utilization of multi-source and multi-parameter (frequency, polarization, geometry) SAR data. INRS and DLR will jointly evaluate the potential benefit of considering polarimetric decomposition information to the automated river ice mapping approach.
The overall goal of the proposed research is to evaluate the suitability of SAR systems to provide river ice situation information to support the management of hydroelectric power stations. The individual objectives are to investigate:
- the capability of high resolution dual pol X-band data to map and distinguish between different river ice classes,
- the synergistic use of TerraSAR-X and RADARSAT-2 imagery (e.g. improvement of classification, increase of observation frequency, backup in case of acquisition conflicts, etc.)
- the consideration of polarimetric decomposition information to improve the classification results.
The main test site will be at the Vermillion Rapids of the Peace River in Alberta, Canada. The site is known by a previous study and is prone to the forming of ice flow lodges and downstream hanging ice dams. A transfer to the Romaine River in Quebec is intended in order to test the suitability of the approach to different ice forming conditions. The second site is located in the mouth of the Saint Laurent River and is affected by tidal effects, salt water intrusion etc.
The results will jointly be evaluated with the hydro stations operators.

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