Geomorphic risk assessment of the 2022 floods in the Wilsons catchment, NSW

This collection comprises geomorphic risk assessment of 2022 floods for Wilsons catchments. This includes:

(i) geomorphic risk assessment based on excessive erosion,
(ii) geomorphic risk assessment based on change in river behaviour,
(iii) geomorphic risk assessment based on sediment imbalance,
(iv) total erosion volume across the river corridor at 1km segment,
(v) total deposition volume across the river corridor at 1km segment,
(vi) net erosion/deposition volume across the river corridor at 1km segment,
(vii) characterisation of geomorphic adjustments across the river corridor at 1km segment,
(viii) post flood river behaviour characterisation,
(ix) DEM of Difference across the river corridor and
(x) DEM of Difference across the catchment.

The i to viii datasets are in vector format (shapefile) at a spatial resolution of 1km segments using the GDA2020 MGA Zone 56 Australian Albers coordinate projection system. The ix and x are in raster format (GeoTiffs) at a spatial resolution of 1 m × 1 m pixel using the GDA2020 MGA Zone 56 Australian Albers coordinate projection system.

These geomorphic risk datasets have been developed using various publicly available datasets: (i) pre and post flood LiDAR DEM (https://elevation.fsdf.org.au/), (ii) pre and post flood high resolution imagery (https://portal.spatial.nsw.gov.au/portal/apps/sites/#/homepage and CSIRO), (iii) post flood bathymetry (https://elevation.fsdf.org.au/) and (iv) stream network with historical geomorphic change characterisation (Khan and Fryirs, 2020).

The DEM of Difference was implemented in the Python programming language through a Jupyter Notebook interface (https://jupyter.org/). Read-only versions of the Jupyter Notebook code are included in this collection.