[GRASS-user] How to combine rasters?

[leonidas300]

I have 3 rasters:
1. Lakes with value 2.5
2. Rivers with value 1
3. Mountains above 1000m with value 3
I need to combine the 3 rasters so as Lakes' values dominate on Rivers' and
Mountains' values and Rivers' values dominates on Mountains' values. How can
I achieve that? Is r.patch suitable for that? Where can I find any tutorial
with raster combination like that? Thank you for any help, Leonidas Greece
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