Leaf area index
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Leaf area index or leaf area ratio is a dimensionless quantity that characterizes plant canopies. It is defined as the ratio of leaf area and ground area, in SI units of square meters per square meter
A hemispherical photograph of forest canopy. The ratio of the area of canopy to sky is used to approximate LAI.
Evapotranspiration
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Evapotranspiration refers to the combined processes that move water from the Earth's surface into the atmosphere, including both evaporation and transpiration. Evapotranspiration is an important part
Leaf area index
…directly related to the amount of light that can be intercepted by plants. It is an important variable used to predict photosynthetic primary production, evapotranspiration and as a reference tool for crop growth. As such, LAI plays an essential role in theoretical production ecology. An inverse exponential relation between…
Diagram showing impact of ground cover on evapotranspiration and other water usage factors