HYDAT Flow Gauge Watersheds - Ontario REPLACED Coordinate system: 4269 - "NAD83" Abstract: Retirement note: please note that this dataset has been retired and replaced by Ontario Integrated Hydrology Data, which is available from the Land Information Ontario (LIO) Warehouse. HYDAT is a water database containing data on daily and monthly means of flow, water levels and sediment concentrations (for sediment sites). This data is stored as series of shapefiles. The spatial layer symbolizes known HYDAT FLOW gauge locations that are part of the Environment Canada/Ontario Ministry of Natural Resources Cost Share agreement. For each of these gauges, there is a shapefile containing a watershed. The name of the watershed shapefile contains the StationID of the gauge. Watershed boundaries were defined using NRVIS data and the Provincial Digital Elevation Model produced by the Water Resources Information Program (WRIP). A separate MS Access database stores a series of watershed characteristics that can be linked to the shapefiles. These characteristics include; watershed area watershed perimeter lake area wetland area other water area (double line streams, reservoirs) terrestrial area reach slope length of longest stream longest stream slope stream order gauge elevation geolgy summary landcover summary length of all streams and number of first order streams Most watersheds and gauges are characterized but is incomplete. Use this dataset with caution when conducting analysis, one point appears to have been located incorrectly. Modifications/revisions to this dataset may be required before any analysis can begin. Supplementary data in shapefile and tabular format can be used and are available for download from the additional documentation section.

Additional Documentation

• Metadata Information

  Language: eng; CAN

  Last Update: 2013-04-19

  Other Maintenance Requirements:

  ddefd3a6-9ef5-4660-b7e1-5378a1a6be27

  Metadata Contact:

  Scholars Portal, Ontario Council of University Libraries Toronto Ontario, Canada

  Contact Instructions:

  gis@scholarsportal.info

  Metadata Standard:

  North American Profile of ISO19115:2003 - Geographic Information

• Citation Information

  
  
  
  

  Ontario Ministry of Natural Resources Peterborough Ontario, Canada

  Themes or Categories of the Resource: inlandWaters

  Keywords:

  WRIP, Watershed Model, Discharge, Stream Flow, Hydrometric surveys, Runoff, Sediment, Water level

  WATER, WATER MANAGEMENT, Watersheds, WATER ANALYSIS, WATER RESOURCES

  Water, Eau, Watersheds, Bassin hydrologique, Water management, Gestion de l'eau

  Place Keywords:

  Continent > North America > Canada > Ontario

  Purpose:

  To assist in improving water supply information on a sub-watershed basis. Also to assist in application of surface water models to estimate flow regimes.

  Dataset Language: eng; CAN

  Status: onGoing

  Update Frequency: asNeeded

  Spatial Representation Type: vector

  Processing Environment:

  ArcGIS 8.x and ArcGIS 9,xMS Access; Shapefile, MS Access

  Extent

  West Longitude: -95.092000

  East Longitude: -74.441806

  North Latitude: 51.173778

  South Latitude: 42.045556

  
  

  Supplemental Information:

  Additional Time Period Information: Watesheds were generated and characterized at various times throughout this time period.

• Spatial Representation - Vector

  Geometric Objects:

  Object Type: point

  Object Count: 777

• Reference System Information

  Reference System Identifier

  Value: 4269

  Code Space: http://www.epsg-registry.org/

• Data Quality Information

  Scope Level: dataset

  
  

  Provincial Digital Elevation Model - Tiled Data Set (DEM): This DEM is required as an input data set for the delineation of watersheds. The DEM was also required for computing the following watershed characteristics; stream reach slope, longest stream slope, and gauge elevation Data collected from 08/01/2001 to 20/12/2002. The provincial Digital Elevation Model (DEM) is a high resolution raster data set covering the province of Ontario to the 51st parallel. It has been interpolated using ANUDEM 4.6.3 software with NRVIS contour and water virtual flow as inputs. Cell resolutions are 20 metres in northern Ontario and 10 metres in southern Ontario.The DEM has been created through the Water Resources Information Project (WRIP), LRC - Peterborough. There are 150 tiles, in packaged-product format, covering the province. They are individually named using the following convention which indicates their extent, version, coordinate system, resolution, and tile number.

  Water Body Segment: The water body segments were required as input for the HYDAT watershed delineation. Water Body Segments were also used in the calculation of the following watershed characteristics; lake area, wetland area, other water area, terrestrial area. Data collected from 01/01/1977 to 01/01/1996. A Waterbody Segment is a polygon or line feature that identifies a segment of a body of water such as a lake, pond, river, stream, or reservoir. A Waterbody Segment may be the Waterbody in its entirety or a component of the Waterbody. These include : river/stream - intermitent/approxiamate, river/stream - single line, virtual segment - stream, lake centroid, marsh/fen centroid, reservoir centroid and river/stream centroid - double line.

  Water Virtual Flow: The water flow is required as an input data set for the delineation of HYDAT watersheds. Water flow data was also required for the calculation of the following HYDAT watershed characteristics. Data collected from 01/01/1976 to 01/01/2003. This data layer was built from the NRVIS water line segments. This data represents a stream network as a dendritic network of fully connected line segments.

  Ontario Landcover Database: For each HYDAT watershed boundary, all landcover types were were summarized and areas recorded in a MS Access database. Data collected from 01/01/1986 to 31/12/1997. The land cover classes consist of vegetation types (such as forest, wetlands, and agricultural crops or pasture) and categories of non-vegetated surface (such as waterbodies, bedrock outcrops, or settlements). The data reflects the nature of the land surface rather than the land use. For example, provincial parks are not discriminated as areas of recreational land use, but are mapped as part of the provincial mosaic of waterbodies, forest types, wetlands, and other cover classes. The Ontario Land Cover data was derived from digital, multispectral LANDSAT Thematic Mapper data recorded on a range of dates between 1986 and 1997, but the majority of the satellite data frames were recorded in the early 1990s. The forest cutovers and burns were updated from 1996 TM coverage for the Great Lakes forest region and most of the Boreal forest region of the province.

• Distribution Information

  Distributor:

  Ontario Geospatial Data Exchange, Ministry of Natural Resource (OMNR) Peterborough Ontario, Canada

• Related Links

  • Archived HYDAT Data, Canada (Environment Canada)
  • National HYDAT Water Database (Environment Canada)