Normal Annual Runoff for 1961 - 1990, in mm

Zones of homogeneous low flow characteristics

10 year peak flow isolines in cubic metres per second (m3/s) for 100 square kilometre watersheds and 10 year return period

Watershed boundary delineated for Canada-BC hydrometric stations. Currently, watersheds were delineated using 1:50,000 scale boundaries in 1996, and many watersheds encompass entire drainages, instead of just the upstream watersheds. Note - Not yet available, but we are in the process of generating BC hydrometric station upstream watersheds using updated base data, using the following method: Within BC, watershed boundaries are based on the 1:20,000-scale Freshwater Atlas fundamental watersheds, and trimmed using the BC TRIM DEM used to approximate the height-of-land at the station locations. Outside of BC, but within Canada, watershed boundaries were approximated using Canada CDED DEM data for delineation (no "stream burning" was used) and some manual editing of boundaries was done to approximately match hydrology data after the fact. Within U.S.A., the USGS Watershed Boundary Dataset was used (at the best scale available for each drainage) to delineate the watershed boundary, with the watershed trimmed using the USGS National Elevation Dataset to approximate the height-of-land when necessary.

100 year peak flow isolines in cubic metres per second (m3/s) for 100 square kilometre watersheds and 100 year return period

BC active and discontinued hydrometric stations (surface water level and flow data) that are part of the provincial hydrometric network managed under a national program jointly administered under a federal-provincial cost-sharing agreement with Environment and Climate Change Canada (ECCC).

This data set includes information on sampling locations and physical conditions in lakes and streams across Ontario. It also includes meteorological conditions from monitoring stations in south-central Ontario. __Lakes__ The data for lakes includes sampling location details and measurements such as: * temperature (1976-2021) * dissolved oxygen levels (1976-2021) * water transparency __Streams__ The data for streams includes measurements such as stream flow discharge from monitoring stations in south-central Ontario. (1976-2019) __Meteorological conditions__ This dataset contains meteorological conditions for climate stations close to monitored lakes in south-central Ontario. It includes measurements such as: * air temperature (1976-2020) * humidity (1976-2020) * precipitation (1976-2020) * wind speed (1976-2020) Data were collected since 1976 as part of routine monitoring of water quality of inland waters and for scientific and research purposes.