A significant hazard in measuring streamflow is the
inability to swim and to work free from equipment and
clothing when footing is lost while wading or if a
gaging structure fails. All hydrographers should be able
to swim and should wear a lifejacket at all times. When
wading measurements are being made, a tagline should be
installed at the gaging section for the hydrographer to
grab if he falls in the water.
Another hazard to the hydrographer may be caused by
traffic on bridges where he often is required to work.
Warning signs, traffic cones and safety vests are
necessary to safely route traffic and protect field
technicians. Requirements for traffic warning signs vary
from state to state and local authorities should be
The hydrographer should carry a well-stocked first
aid kit in his vehicle and should be familiar with the
kit's contents and standard first aid practices. It is
best to work in pairs when stream gaging with one person
on the bank in the event of an accident.