Staff gauges (Staff Gages in the USA) look like oversized rulers, that are permanently installed in a body of water. They provide a quick visual reference of the water level. Their simplicity and effectiveness mean they are quite ubiquitous, in fact, after reading this article we bet you will spot more staff gauges on your river walks.
Calling a staff gauge an ‘an oversized ruler’ is a little disparaging, however, we are not far from the truth. Of course, there is a lot more to them than meets the eye.
