Pondage or Raw Water Reservoir:

A pondage is a small reservoir, in which raw water is stored before it reaches the treatment system. In it, a long residence time of the water is generated which has two effects on the water.

In it, a long residence period of the water is generated that has two effects on it:

• Facilitates the sedimentation of particles the size of sand.


• It fulfills a homogenizing function in terms of quality and flow. In this way, the existence of a pondage has a positive impact on reducing the concentration of pollutants at the entrance to the treatment system

The above characteristics support the advantage of having a pondage upstream of treatment systems whose supply sources present high concentrations of solids or high variability in the representative parameters of water quality.

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