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Wageningen University (2015)

Investigating methods for assessing erosion and landform stability on rehabilitated mining waste dumps in the Pilbara region, Western Australia : analysing the potential of remote sensing and ground-based methods for erosion assessment with GIS and modelling at the hillslope and gully scale

Nofuentes Martínez, Beatriz

Titre : Investigating methods for assessing erosion and landform stability on rehabilitated mining waste dumps in the Pilbara region, Western Australia : analysing the potential of remote sensing and ground-based methods for erosion assessment with GIS and modelling at the hillslope and gully scale

Auteur : Nofuentes Martínez, Beatriz

Université de soutenance : Wageningen University

Grade : Master of Science (MS) 2015

Résumé
Mining can have significant impacts on the local environment, including degraded scenery, landscape degradation, landscape fragmentation, loss of biodiversity and decreased quantity and quality of water resources (Darwish et al., 2010). Apart from being the most visual landform left after mine closure, waste dumps are the most susceptible to erosion (Department of Mines and Petroleum, 2009), leading to landform instability and off-site effects (Evans, 2000). In order to avoid these impacts and thus, convert an area to safe and stable conditions, the effective rehabilitation planning and monitoring of waste dumps becomes essential. The present research focuses on investigating the potential of methods for assessing erosion and landform stability on rehabilitated waste dumps in the Pilbara region, Western Australia. Various methods for obtaining surface and elevation data – remote sensing (LIDAR and UAV), and groundbased methods (laser scanning, 3D reconstruction and erosion measurements) - were assessed at the hillslope and gully scale by analysing surfaces with ArcGIS and modelling them with the Water Erosion Prediction Program (WEPP) model. The research outcomes provide tools for assessing erosion at different scales, monitoring landform changes over time and supporting or justifying future decision-making in rehabilitation planning of mining waste landforms.

Mots clés : erosion assessment, rehabilitated mining waste dumps, remote sensing, ground-based methods, WEPP model, GIS, hillslope and gully scale.

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Page publiée le 15 septembre 2016, mise à jour le 17 octobre 2018