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.