RiverWeb Tour
Instructions

Zooming with a date subrange

The RiverWeb WQS can zoom in on the time scale. This enables us to resolve the changes in a water quality indicator in more detail over a shorter timespan.

Lets investigate the behavior of phosphorus concentration and precipitation around day 150 where a precipitation peak is visible. First, change the top popup menus to phosphorus. Now for each graph, we will change the Day range to 120-180 (see illustration) and submit using the Change Display button. Note - don't change the Range (Y Axis) values.

zooming

Now type in 120 and 180 in the Day boxes for each graph and click on the Change Display button (RiverWeb frame). Then click on "Station Displays: Examining the subrange" (menu frame).