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Watersheds
For 330 Watersheds, From Chapin et al 2011
Term | Definition |
---|---|
Base flow | Background stream flow from groundwater input in the absence of recent storm events. |
Canopy interception | Fraction of precipitation that does not reach the ground. |
Coupling | Effectiveness of atmospheric mixing between the canopy and the atmosphere. |
Evapotranspiration | Water loss from an ecosystem by transpiration and surface evaporation; equivalent to latent heat flux, but expressed in water units. |
Infiltration | Movement of water into the soil. |
Leaf Area Index | Projected (i.e., one side of a flat leaf) leaf area per unit ground area. |
Precipitation | Water input to an ecosystem as rain and snow. |
Rooting depth | The depth to which plants are able to grow roots |
Runoff | Water loss from an ecosystem in streams and rivers; also known as discharge. |
Stemflow | Water that flows down stems to the ground. |
Sublimation | Vaporization of a solid such as snow. |
Surface conductance | Potential of the leaf and soil surfaces in the ecosystem to lose water; similar to stomatal conductance but applied at the canopy scale. |
Surface roughness | Vertical irregularities in the height of the canopy surface. |
Throughfall | Water that drops from the canopy to the ground. |
Watershed | A river or stream and all the terrestrial surfaces that drain into it; synonymous with catchment or drainage basin. |