The Hydrologic Database (HDB) is the foundation for the United States Bureau of Reclamation's (USBR)
Database of Record. As conceptualized by the Database of Record defining document, the driving vision
for the Hydrologic Database is:
to consolidate data existing in various systems and personal spreadsheets.
to assure complete and consistent data collection and storage; documentation of data sources.
to provide historical information on other existing HDB data versions including information on when
the data was either used or available for use.
as a means of quality control.
to allow the user access, at any time interval, to the original source data for calculated or summarized data
to provide for an automated generation of time-aggregated summary data.