I am using RADAR data to create a map of biomass estimates.
I want to mask out all land susceptible to flooding because water-logged soils affect the backscatter ...and will have an impact on biomass estimate. For part of this process I just want to mask out flood-prone areas around waterbodies.
This will be a very basic operation (because I am doing it over a very large area) and I am happy if it means that I mask out regions that don't get flooded.
- a DEM for the region in question
- a binary raster of water bodies/non-water-bodies area
My suggested approach is to mask out all cells in the radar raster that lie within x-metres of height of the waterbodies.
I am using QGIS but have not been able to identify a simple solution to do this. Can anyone help?
.....One of my thoughts had been to identify the drainage basins of the water bodies and mask out all cells within the basin that lie within x m of the water body ....this is problematic for rivers...which have a full range of heights/drainage basins.