<p>The title has nothing to do with my question.</p>
<p>Is hydrology a specific major or is it a sub field of geology?</p>
<p>Can someone with a graduate degree in geology be considered a hydrologist?</p>
<p>Hydrology is usually an area of concentration of Earth Science, but it can also be part of Geological Engineering for schools that offer that major. So it depends on the school but it is more engineering focused than most geology fields.</p>