URI
Notation
556
Caption
Hydrosphere. Water in general. Hydrology
See also
532Fluid mechanics in general. Mechanics of liquids (hydromechanics)
551.4Geomorphology. Study of the Earth's physical forms
553.7Mineral springs
626/627Hydraulic engineering and construction. Water (aquatic) structures
Broader class
55  Earth Sciences. Geological sciences
Narrower classes
556.3Groundwater hydrology. Geohydrology. Hydrogeology
556.5Surface-water hydrology. Land hydrology