- the science dealing with the occurrence, circulation, distribution, and properties of the waters of the earth and its atmosphere.
- hydrogeology; geohydrology.
Origin of hydrology
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- the study of the distribution, conservation, use, etc, of the water of the earth and its atmosphere, particularly at the land surface
Word Origin and History for hydrologically
Online Etymology Dictionary, © 2010 Douglas Harper
- The scientific study of the properties, distribution, and effects of water as a liquid, solid, or gas on the Earth's surface, in the soil and underlying rocks, and in the atmosphere.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.