Ontario Ministry of Natural Resources Peterborough Ontario,
Canada
Themes or Categories of the Resource: geoscientificInformation
Keywords:
WATER, WATER MANAGEMENT, HYDROGRAPHY, WATER RESOURCES, WATER ANALYSIS, HYDROLOGY, DRAINAGE, CATCHMENTS, CATCHMENT HYDROLOGY, WATERSHEDS
WATER, WATER MANAGEMENT, Watersheds, WATER RESOURCES, WATER ANALYSIS, HYDROLOGY, DRAINAGE, CATCHMENTS
Water, Eau, Water management, Gestion de l'eau, Hydrography, Hydrographie, Hydrology, Hydrologie, Watersheds, Bassin hydrologique, Drainage, Drainage
Place Keywords:
Continent > North America > Canada > Ontario
Purpose:
These AH sessions were developed and tested originally for Version 1.1 Arc Hydro tools on the ArcGIS 9.1 platform in the Personal Geodatabase format (.MDB). Later versions of the tool appear to have undergone some fundamental data model changes that affect how the watershed delineation functions operate. Because of this, we have have upgraded the sessions so that they are compatible with Arc Hydro Tools Version 1.3 or later. Appendix 2 of the Technical Bulletin included with the AH sessions describes the procedure followed for updating the old sessions, which may be useful for end users in their own AH implementations. These AH sessions are not considered complete data models. They are a beginning framework for conducting further analysis to meet your specific needs. Certain elements of the data model are populated using the 10k/20k NRVIS and WRIP hydrology base data sets. Some fields within the layers may not be populated at this time, but they are included to give the user an idea of what can be stored in these feature classes. A basic geometric network can be created containing a default temporary junction feature class, but we recommend that you create your own permanent Hydrojunction feature class to be used as part of the geometric network (see Working with the Geometric Network section for details). The AH sessions are not limited to use in Arc Hydro. The data is easily accessible without having to install Arc Hydro and can be exported for use in other software applications. However, you will not be able to realize the full potential of the data relationships established without having AH or related tools available to assist you in your analysis. Complete data model templates are available from WRIP to add additional feature classes to the AH sessions as needed for your analysis. Some components as described in the Model Overview (Section 7) are included as empty feature classes for the user to populate (such as the watershed point and polygon feature classes). The feature classes that were populated were those specifically required by ARDB to complete their stream site analysis project. This AH product can be used for regional scale analysis for a variety of purposes. It is not intended for detailed site level analysis. Currently, there is no intention to incorporate higher resolution data sources into this product. If you prefer to use your own data sources, you can add to the existing model, provided you honour its original intended scale, or you can use the principles and templates that are available to create your own Arc Hydro sessions using your own data. The Provincial data is provided 'as-is' and there are currently no plans for further enhancements or updates until MNR's Hydrographic Data Strategy Project has been fully realized and implemented. One component of this Strategy, which is known as 'water flow consolidation', involves developing a new standard hydrographic model to bring together disparate versions of data being managed or updated by different partners within and external to the MNR. In the interim, if users notice any data discrepancies or stream network connectivity issues, these issues will be logged by WRIP when notified and will be forwarded to the proper data custodian (as determined by the Strategy) after the fall of 2009 (the anticipated completion of the water flow consolidation phase). For further information on the Hydrographic Data Strategy, contact the Base Data Infrastructure group of the MNR in Peterborough.
Dataset Language:
eng; CAN
Status: completed
Update Frequency: asNeeded
Spatial Representation Type: grid
Processing Environment:
ESRI Arc GIS 9.2 Personal Geodatabase using AH Tools Version 1.3.; A series of Quaternary Personal Geodatabases (MDB) / Raster Layers / Project Map Files (ESRI MXD) packaged by Tertiary Watershed.
Extent
West Longitude: -93.98333
East Longitude: -74.31667
North Latitude: 50.78333
South Latitude: 41.66667
Supplemental Information:
Additional Time Period Information: The base data products were continually QA/QC'ed and updated as the Arc Hydro Project progressed to ensure spatial integrity across all layers and derivative products. Certain areas of the Province were completed at different periods of time since 2006 and have been versioned internally within WRIP. Generally, these AH products comply with Version 2.x.x of our base hydrology products (DEM, EFDIR, and Waterflow) before August 1, 2009. See Data Source Information section.