Daily water withdrawal from the Cantareira reservoir depends on stored water volume.

<p>Withdrawals by the reservoir operators saturated to a maximum average value when stored water was above one third of operational capacity. Note also that when stored water fell below -15% operators plunged withdrawals from ca. 23 to 14 <i>m</i>³<i>s</i>⁻¹. Since then releases are kept at these levels despite an increase in the stored volume, to save the current volume (darker points).