Name	Notation	Description	Types	Status
Groundwater (amount per unit area)	165	Amount of water present beneath the ground surface per unit a...	Concept	stable
Groundwater level	166	Elevation of the water table or piezometric surface of an aqu...	Concept	stable
Lake area	167	Area extent of the surface of a lake.	Concept	stable
Lake level	168	Elevation of water in an inland body of surface water of sign...	Concept	stable
Stream discharge	171	Volume of water flowing through a stream (or channel) cross-s...	Concept	stable
Stream level	172	Elevation of the free water surface of a water body flowing i...	Concept	stable
Well discharge	174		Concept	stable
Breaking action-friction coefficient	231		Concept	stable
Coastlines	232	Location of coastlines (Lat/Long)	Concept	stable
Land cover	236	Processed from land surface imagery by assigning identified c...	Concept	stable
Land surface topography	237	Map of land surface heights.	Concept	stable
Runway conditions	239		Concept	stable
Wetland extent	243	Fraction of an area flood by water.	Concept	stable
Soil heat Flux	245		Concept	stable
Soil type	246	Result of the classification of different types of soil withi...	Concept	stable
Fire fractional cover	386	Fraction of a land area where fire is occurring.	Concept	stable
Fire radiative power	387	Power radiated by the fire occurring within an area.	Concept	stable
Fire temperature	388	Temperature of the fire occurring within an area.	Concept	stable
Land surface temperature	389	Temperature of the apparent surface of land (bare soil or veg...	Concept	stable
Lake Surface Temperature	410	Temperature of the lake surface.	Concept	stable
CO2 flux	422	Flux of carbon dioxide from the surface to the atmosphere	Concept	stable
Biomass	423	Total amount of vegetation in a reference area	Concept	stable
Fraction of vegetated land	424	Fraction of a land area where vegetation is present.	Concept	stable
Leaf Area Index (LAI)	425	LAI (Leaf Area Index, LAI) is the total one-sided area of pho...	Concept	stable
Normalised Difference Vegetation Index (NDVI)	426	Difference between maximum (in NIR) and minimum (around the R...	Concept	stable
Vegetation type	427	Result of the classification of different types of vegetation...	Concept	stable
Evaporation	510	Quantity of water evaporated from the soil and plants when th...	Concept	stable
Soil moisture (in the roots region)	527	Fractional content of water in a volume of wet soil. Typicall...	Concept	stable
Soil moisture at surface	528	Fractional content of water in a volume of wet soil. Surface ...	Concept	stable
Fraction of Absorbed PAR (FAPAR)	563	Fraction of PAR absorbed by vegetation (land or marine) for p...	Concept	stable
Photosynthetically Active Radiation (PAR)	564	Flux of downwelling photons of wavelength 400-700 nm.	Concept	stable
Soil temperature	596	The standard depths for soil temperature measurements are 5, ...	Concept	stable
Glacier motion	611	Velocity of the ice measured at the surface of a glacier.	Concept	stable
Glacier topography	612	Map of the height of the glacier surface.	Concept	stable
Ice sheet topography	613	Map of ice sheet height over land.	Concept	stable
Depth of snowfall	627	The vertical depth of freshly fallen snow that has accumulate...	Concept	stable
Snow cover extent	628	The area of snow-covered ground, ice, or firn based on the fr...	Concept	stable
Snow depth	629	Vertical distance from the snow surface to a stated reference...	Concept	stable
Snow surface state	630	Binary product (dry or wet) expressing the presence of liquid...	Concept	stable
Water equivalent of snow cover	631	The Vertical depth of the water that would be obtained if the...	Concept	stable
Ice thickness	725		Concept	stable
Ice thickness	726		Concept	stable
Presence of snow	12007	A binary observation of the presence of snow cover at the mea...	Concept	stable
Water equivalent of snowfall	12008	Vertical depth of the water that would be obtained if the fre...	Concept	stable
Glacier mass balance at a point	12009	The result of all processes adding and removing mass from the...	Concept	stable
Glacier-wide mass balance	12010	The result of all processes adding and removing mass from the...	Concept	stable
Surface accumulation at a point	12011	The mass added to the glacier at a point on its surface expre...	Concept	stable
Surface ablation at a point	12012	The mass removed from the glacier at a point on its surface e...	Concept	stable
Glacier area	12013	Area enclosed by the projection of the glacier outline onto t...	Concept	stable
Permafrost temperature	12014	Ground temperature measured in the permafrost.	Concept	stable
Active layer thickness	12015	Thickness of the surface layer of the ground that is subject ...	Concept	stable
Rock glacier velocity	12016	Surface velocity of a single rock glacier unit.	Concept	stable
Stream velocity	12247	Ratio of the distance covered by a body of water, moving in a...	Concept	stable
Stream mean velocity	12248	Velocity at a given cross-section of a stream, obtained by di...	Concept	stable
Stream surface velocity	12249	Velocity of a stream at its surface at a given point. [Based ...	Concept	stable
Water surface slope	12251	Difference in the stage of water surface over a short stream ...	Concept	stable
Water level	12252	Elevation of the free water surface of a water body relative ...	Concept	stable
Percolation rate	12253	Flow of a liquid through an unsaturated porous medium, such a...	Concept	stable
Recharge rate	12254	Natural or artificial introduction of water into the saturate...	Concept	stable
Aquifer volume	12255	Volume of geological formation capable of storing, transmitti...	Concept	stable
Hydraulic conductivity	12256	Property of a porous medium or fractured rock which, accordin...	Concept	stable
Hydraulic transmissivity	12257	Rate at which water is transferred through a unit width of an...	Concept	stable
Porosity	12258	Ratio of the volume of the interstices in a given sample of a...	Concept	stable
Effective porosity	12259	Volume of the void spaces through which water or other fluids...	Concept	stable
Specific retention	12260	Amount of water held in the soil after gravitational water ha...	Concept	stable
Infiltration rate	12261	Flow of water through the soil surface into a porous medium f...	Concept	stable
Infiltration capacity	12262	Maximum rate at which water can penetrate the soil matrix per...	Concept	stable
Specific capacity (well)	12263	Ratio of discharge of a well to drawdown at equilibrium. [Int...	Concept	stable
Specific yield	12264	Ratio of the volume of water which can be drained by gravity ...	Concept	stable
Groundwater flow	12265	Volume of groundwater flowing through an aquifer per unit tim...	Concept	stable
Storage	12266	(1) Impounding of water in surface or underground reservoirs ...	Concept	stable
Total dissolved solids	12267	The concentration of all dissolved substances in water, usual...	Concept	stable
Suspended sediment	12268	The component of an unacidified water sample that is retained...	Concept	stable
Sediment discharge	12270	Rate of movement of sediments in a stream at a given cross-se...	Concept	stable
Bed load discharge	12271	Amount (weight, mass or volume) of sediment that moves on or ...	Concept	stable
Suspended sediment load	12272	That part of the total transported sediment which is suspende...	Concept	stable
Total sediment load	12273	Total quantity of sediment passing through a reach, both in s...	Concept	stable
Runoff	12274	That part of the precipitation which flows towards a river on...	Concept	stable
Runoff coefficient	12275	Ratio of runoff depth to precipitation depth. [International ...	Concept	stable
Depth of runoff	12276	Runoff volume from a drainage basin, divided by its area, in ...	Concept	stable
Soil moisture	12277	Percentage of water in soil expressed relative to dry-soil we...	Concept	stable
Live storage	12278	Volume of water in a reservoir between the minimum and maximu...	Concept	stable
Reservoir storage	12279	Volume of a reservoir including dead storage. Synonym: total ...	Concept	stable
Lake volume	12280	Volume of water contained in a lake at a given water level. [...	Concept	stable