期刊
GEOMATICS NATURAL HAZARDS & RISK
卷 12, 期 1, 页码 1584-1615出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/19475705.2021.1935333
关键词
Remote sensing; GIS mapping; hydrogeomorphology; geohazards; cold environments
资金
- 'Ministere de l'Environnement et de la Lutte contre les changements climatiques (MELCC)' (Government of Quebec)
Over the past decades, changes in riparian land use and the multiplication of river infrastructures have increased vulnerability for societies and ecosystems. GIS-based mapping allows integration of environmental data, but incomplete and heterogeneous datasets can be problematic for regional land-use planning strategies. High-resolution methods can effectively identify erosion susceptibility and its impacts.
Over the past decades, riparian land-use changes coupled to the multiplication of river infrastructures have enhanced vulnerability issues for societies and ecosystems located along large rivers. Exposure to geohazards is also changing due to the ongoing climate change, underlining the need for flexible management strategies for riparian environments. In this perspective, GIS-based mapping allows integrating a wide range of environmental data. However, such datasets are often incomplete and not homogeneous over large geographical scales, which can be problematic for the implementation of regional land-use planning strategies. Using the St. Lawrence fluvial system (SLFS) (Quebec, Canada) as a case study, this article reports and describes a high-resolution approach to map position, characteristics and erosion susceptibility of natural and artificial riverbanks from a combination of field-based, remote sensing and local knowledge-derived data. This approach allowed identifying erosion-prone sites and highlighting dominant erosion processes and spatially constrain them along the SLFS. The proposed geospatial framework constitutes (1) an initial portrait of the riverscape that will allow an effective implementation of future monitoring and process-based studies; and (2) a first step in supporting land-use planning stakeholders in the selection of appropriate measures to ensure a greater resilience of riparian communities and ecosystems.
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