Hydrometric Rating Application (HydRA)

Hydrometric work involves regular visits to a hydrometric gauging station across a range of streamflow conditions. A hydrometric gauging station typically consists of a stage sensor and benchmarks or reference gauge from which water level is referenced. Each field visit should collect three basic observations: reference of stage, measurement of discharge, and control observation. These observations are required to convert stage into discharge through the development of a hydrometric rating curve. (Note: Safety should be considered when collecting these observations, do not attempt any unsafe field work!).

The Hydrometric Rating Application (HydRA) is a tool for developing hydrometric rating curves based on observations of stage and discharge. HydRA allows the user to upload observations of stage and discharge and automatically fits a rating curve. Users can adjust the fit according to onsite observations. It then generates a rating equation that can be used for converting stage datasets into discharge. 

• List of supporting resources for rating curve development
  • BC RISC Manual (2018)
  • Water Survey of Canada Manual on Rating Curves (2016)
  • WMO Manual on Stream Gauging (1980)
  • Australian Water School – Rating Curves Resources
  • Hamilton, S., Watson, M., & Pike, R. (2019). The Role of the Hydrographer in Rating Curve Development. Confluence: Journal of Watershed Science and Management, 3(1). https://doi.org/10.22230/jwsm.2019v3n1a11
• Link to HydRA
• Link to Feedback for Hydra
• Link to slides for HydRA webinar