About This MapThis mapping application displays current EDT network and assessment unit data layers for the Okanogan subbasin, in addition to other planning layers such as OBMEP Survey Sites. This platform will be used over the course of the project to display all project related spatial data and EDT output results. The control panel will be expanded and provide user-friendly tools for comparing various management scenarios across the basin.
Alkalinity, or acid neutralizing capacity (ANC), is measured as milli-equivalents per liter or mg/l of either HCO3 or CaCO3. Alkalinity is broadly correlated with the productive capacity of streams, with respect to both primary production and fish production (Ptolemy 1993). Hard waters apparently tend to be more productive, though reasons for this have not been clearly established (Hynes 1972).
Alkalinity is used in EDT as a measure of stream productivity and in turn, affects 1) the maximum density that can be attained by the end of rearing life stages and 2) resulting species productivity.
Categorical Rating Definitions
0: Very low (average value typically would be 0-5 mg/l)
1: Moderately low (average value typically would be 5-10 mg/l)
2: Moderately high (average value typically would be 10-40 mg/l)
3: High (average value typically would be 40-100 mg/l)
4: Very high (average value typically would be 100-300 mg/l)
|Natural Chennel Confinement||0.69|
|Artificial Channel Confinement||0.54|
|Flow Peack Change||0.53|
Stream Mapping Help
Drawing a few sample lines is recommended to get acquainted with the Stream Mapping tools.
Click on the map to begin. Each subsequent click will place a new vertex. To complete the line,
simply click on the final point after it is placed. Avoid rapid double-clicking, as this may cause
[Undo] will remove the most recent vertex.
[Cancel] will remove the line you are currently drawing.
Editing allows you to add and move vertices.
[Save] will commit any changes permanently
[Cancel] will remove vertices added in the editing process, but will not revert the movement of original verteces moved in the editing process
After clicking the Delete button, click on any drawn line to remove it from the map.
[Save] will permanently remove all lines selected in the deletion process.
[Cancel] will return all lines selected for deletion
All drawn lines exist only in the current browser session and is not saved.