The links below will guide you to the relevant pages of the Departement Water and Sanitation which shows the graph of the capacity [%] or flow [m3/s or cumec] for the last 14 days for that specific station.  Please note that these graphs are based on unverified data, and that it could change due to the verification process.  Verified data for these and other stations can be obtained from the web adress https://www.dwa.gov.za/hydrology/hymain.aspx