Case for redundancy

Here’s a look at the water level recorder …

That supplied the data for the hydrographs.

Have you ever passed a monitoring
station and wondered what it says?

This particular gage has been around since the 1960s.

The paper chart on the inside provides a continuous record.

Of course if you are birding
you may not pay it any mind

Then of course there is the staff gage on the other side,

Which volunteers visually read once a day.

Hydrologic redundancy is a good thing.