How do you calculate evaporation from evapotranspiration?
How do you calculate evaporation from evapotranspiration?
The evapotranspiration (ET) is the amount of water transferred to the atmosphere by evaporation from the soil and plant transpiration: Evapotranspiration = Evaporation + transpiration.
What is the Penman Monteith equation used for?
The Penman–Monteith equation is widely used in land process modeling to estimate vegetation transpiration or soil evaporation because it requires only conventional observations as input and does not require input from two levels.
What are the uses of Penman-Monteith equation?
How do you calculate crop evapotranspiration?
Crop evapotranspiration is calculated by multiplying ETo by Kc, a coefficient expressing the difference in evapotranspiration between the cropped and reference grass surface.
What is FAO Penman-Monteith?
The FAO Penman-Monteith method is selected as the method by which the evapotranspiration of this reference surface (ETo) can be unambiguously determined, and as the method which provides consistent ETo values in all regions and climates.
What is evapotranspiration and how is it calculated?
Evapotranspiration is the sum of evaporation from the land surface plus transpiration from plants. Sources/Usage: Public Domain. Visit Media to see details. The typical plant, including any found in a landscape, absorbs water from the soil through its roots. That water is then used for metabolic and physiologic functions.
How is evapotranspiration governed by the principle of energy conservation?
Therefore the evapotranspiration process is governed by energy exchange at the vegetation surface and is limited by the amount of energy available. Because of this limitation, it is possible to predict the evapotranspiration rate by applying the principle of energy conservation.
What is crop evapotranspiration under standard conditions?
The crop evapotranspiration under standard conditions, denoted as ETc, is the evapotranspiration from disease-free, well-fertilized crops, grown in large fields, under optimum soil water conditions, and achieving full production under the given climatic conditions. TABLE 2. Average ETofor different agroclimatic regions in mm/day Regions
What are the factors that affect transpiration rates?
Transpiration rates vary widely depending on weather conditions, such as temperature, humidity, sunlight availability and intensity, precipitation, soil type and saturation, wind, and land slope.