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The difference between hydrology and hydraulics continues to confuse laypersons.
Even engineers are often fuzzy about the subject. In a nutshell,
hydrology converts rainfall to discharge;
hydraulics converts discharge to pressure.
In the 1980s,
at a conference in San Francisco, California,
I met a colleague who was employed with a leading engineering company.
He had gotten his doctorate in hydraulic engineering at a very
reputable school and had eventually risen to become section head at his company.
Yet, the title in his business card read: "Chief Hydrologic Engineer."
Knowing very well that his training was in hydraulics,
I could not help but to ask him how much he knew about hydrology.
He responded, with a smile: "Not much, but it sells much better than hydraulics."
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