Used for general studies. For the science that deals with subsurface waters and related geologic aspects of surface waters. To search for the hydrology of a particular river, search for the name of the river in combination with hydrology or hydrogeology.
Hydrogeology (category)
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Hydrogeology, GeoRef category code 21, is one of thirty categories used to classify documents in GeoRef. Each reference in GeoRef is assigned one or more categories. Categories can be used, in addition to Terms, to refine searches (See List A.).