Hydrography (HY) Iceland is one of 12 themes in the European Location Project (ELF). The purpose of ELF is to create harmonised cross-border, cross-theme and cross-resolution pan-European reference data from national contributions. The goal is to provide INSPIRE-compliant data for Europe. A description of the ELF (European Location Project) is here: http://www.elfproject.eu/content/overview Encoding: INSPIRE version 4

The "Effective Drainage Area of the AAFC Watersheds Project - 2013" dataset is a geospatial data layer containing polygon features representing the areas of the Agriculture and Agri-Food Canada's (AAFC) Watersheds Project that could, for the entire project areas, be expected to contribute to surface runoff under average runoff conditions.

Spatial dataset of DRASTIC Aquifer Intrinsic Vulnerability study areas in BC, and which also serves as an index containing links to the technical summary reports stored in the BC Government's Ecological Reports Catalogue (EcoCat). For the DRASTIC Aquifer Intrinsic Vulnerability mapping data related to each report, please see https://catalogue.data.gov.bc.ca/dataset/33bcf95c-6742-419d-a898-9b26109d6504 For more information (including an explanation of the DRASTIC method) please see "A Guide to the Use of Intrinsic Aquifer Vulnerability Mapping" at https://a100.gov.bc.ca/pub/acat/public/viewReport.do?reportId=23346

Double line streams from FC1 assigned a stream class

Watershed polygons representing the Major Watershed Code Numbers of BC. Based on the 1:50,000 scale Canadian National Topographic Series of Maps.

Collection of flood products for active and past floods throughout Canada as monitored by Natural Resources Canada using satellite imagery for emergency response. This collection of cartographic products regroups flood extent polygons and their associated footprints. Three visualization timeframes are available : - **[Active Floods in Canada](https://open.canada.ca/data/en/dataset/9cad712a-5ac5-4248-b7d7-2db1a3892509)** - **[Floods in Canada - Current Year](https://open.canada.ca/data/en/dataset/b1afd8d2-6e14-4ec4-9a09-652221a6cb71)** - **[Floods in Canada - Archive](https://open.canada.ca/data/en/dataset/74144824-206e-4cea-9fb9-72925a128189)**

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.

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

This layer represents Water Survey of Canada (WSC) and United States Geological Survey (USGS) gauge stations that meet the following criteria for inclusion: at least 10 years or data (with 350 or more days of observations) above the low outlier threshold; less than 20% (by basin drainage area) regulation; a corresponding basin polygon dataset (either supplied or delineated) with a area <15% different than the basin area reported by WSC or USGS; full metadata coverage for the basin (e.g. mean annual precipitation, elevation, etc.); and 1-, 3-, 5-, and -10 day distribution fits that did not overlap for any Average Recurrence Interval’s (ARI) above 2 years. See Bulletin 2020-1-RFFA British Columbia Extreme Flood Project – Regional Flood Frequency Analysis – Technical development report and manual to complete a regional flood frequency analysis.

Province-wide SDE layer showing licensed water sources (streams and lakes), under the Water Act, (current and historical), not captured (displayed) on TRIM base mapping (or Freshwater Atlas base mapping). Includes an attribute for the internal Source Code number, which is associated with the (E-Licensing) stream name.