Fig. 2
Steps involved in building and distributing the flood water depth product for the Murray Darling Basin. The three panes show steps of the water depth product development. (a) Input data processing involves acquisition of two products: two-monthly maximum water surface extent (from Landsat)19 and a high-resolution Digital Elevation Model (combined from data sources)20, which we split into 23 regions for processing. (b) Floodwater Depth Estimation Tool (FwDET) algorithm v232 was used to identify the surface water elevation at the boundary (perimeter) of inundated areas. The perimeter water surface levels (elevations) were interpolated across inundated areas to provide continuous surface water levels. The depth was calculated by subtracting the Digital Elevation Model from the surface water levels and merging (recombining) across the Murray Darling Basin. (c) The resulting water depth rasters were archived in CSIRO’s Data Access Portal, and were also distributed through web services for machine access (i.e. Web Mapping Service) and presented through a geospatial visualisation platform for point-and-click visualisation of water depth across the floodplains of the Murray Darling Basin.
