In partnership with Federal University of São Carlos, Hydronumerics upgraded SABESP’s Sistema Diagnóstico Online to include the Jaguari-Jacarei System. The ARMS configuration was updated to include two aditional Lake Diagnostic Systems and a calibrated and validated ELCOM-CAEDYM model. Hydronumerics is continuing to work with SABESP and Federal University of Sao Carlo to look at improving the modelling of the reservoir in the current drought conditions.