habitat, hade, Hagen-Poiseuille equation, Halbhohle, Halbkugelkarst, half tube; half-tube, half-blind valley, half-exposed karren, halite, hall, halocline, halomorphic soil, hanging blade, hannayite, hardening, hardness, hardpan, harness, havara, haystack hill, head, head loss, head water, head, static, head, total, heat of condensation, heat of vaporization, heel-print karren, helictite, heligmite, helmet, hematite, hemimorphite, herbivore, heterogeneity, heterogeneous, hexahydrite, hibbenite, hibernation, histo, histoplasmosis, hod, holokarst, homogeneity, homogeneous, homogeneous fluid, hook gage, hopeite, horizontal angle, horst, Horton number, hot-seat rappel, hoya, hoyo, hum, humidity, absolute, humidity, relative, humus-water grooves, huntite, hydration, hydraulic barrier, hydraulic conductivity, hydraulic conductivity, effective, hydraulic diffusivity, hydraulic discharge, hydraulic fracturing, hydraulic gradient, hydraulic head, hydraulic jump, hydraulic profile, hydraulic radius, hydrochemical facies, hydrocompaction, hydrodynamic dispersion, hydrodynamic dispersion, coefficient of, hydrogeochemistry, hydrogeologic, hydrogeologic, hydrogeologic unit, hydrogeology, hydrograph, hydrograph separation, hydrograph, characteristic, hydrography, hydrologic barrier, hydrologic budget, hydrologic properties, hydrology, hydromagnesite, hydrometeorology, hydrometric station, hydrometry, hydrophilic, hydrophobic, hydrophyte, hydroscopic coefficient, hydroscopic water, hydrosphere, hydrostatic pressure, hydrostratigraphic unit, hydroxylapatite, hydrozincite, hyetograph, hygrometer, hygroscopic nucleus, hypogean, hypogeum, hypolimnion,