Oldman Watershed Priority Mapping Report & Maps
The Oldman Watershed Priority Mapping Report & Maps project is courtesy of the Southern Alberta Land Trust Society (SALTS).
This report summarizes the process used to come up with the maps including the experts consulted, datasets chosen, and mapping methodology employed.
Overlay Results Map
This map shows those areas that if kept intact will provide the greatest value in terms of maintaining water quality, storing water, and slowing runoff. The areas in red, orange, and yellow have the highest values in this respect.
Priority Sub-basins Map
This map takes the data from the overlay results and identifies which sub-basins within the watershed hold the greatest coverage of high priority areas (in this case areas red though yellow). This allows organizations or communities to focus on sub-basins of high priority.
Priority Map Book
The map book contains the same information as the overlay results but at a much higher resolution and with more detailed features to help orient users. The map book allows a user to zoom in and look at the landscape at the level of an individual quarter section.
Georeferenced Image for GIS (large 20 MB)
This high resolution georeferenced TIF along with TFW and LYR files should allow Arc GIS users to import the image of the overlay results and use it alongside other datasets as a tool to support organizational, project, or land-use planning.
Given their scale and emphasis, the maps do not always highlight the significant value of riparian areas immediately adjacent to waterbodies and watercourses (e.g. 0-50 metres). These areas have their own value from a habitat and watershed services standpoint that should be taken into consideration on top of the data presented in this project. While not all rivers, creeks, lakes, and wetlands are shown as red, this does not mean that riparian areas immediately adjacent to the water are not of high value.
If users download the maps and open them in Adobe Acrobat (not reader) different map features can be turned on and off by toggling the layers icon on the left-hand side of the screen. This allows some customization of maps by different users for different viewing/presentation purposes.