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I'm looking to calculate the volume of a virtual reservoir from a DEM. I would use a constant grid (SAGA) to represent the ceiling, and I want to see the change in volume for each 1 metre interval. So I would need to create multiple ceilings.

Obviously there would be several of these, and I want to quickly create a set that begins from the min value of the DEM to the max value

Using this I would be able to create a volume to area ratio calculation for each 1m step. In the modeler, I haven't seen an option to make the function iterative. I'm not sure how to best approach this.

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