The municipality of Rouiba is entirely within the Plain of Mitidja. It doesn't affect neither the sea, nor the Atlas. The altitudes are all very low, of the order of 20 m, and even less than 10 m near El Biar River which limits the town to the east. Everything is flat, with the small exception of Haraoua ride in the far north, which reaches 50 m.
In the Western part, the tight meanders of El Hamiz River emphasize the low slope of the river and flood risk, at least before the construction of the dam opened on the mountain in 1883 which has regularized the flow.