The present invention relates to a device for determining the real evapotranspiration (ETr) of a natural or cultivated vegetated surface. US 2010/212 409 A1 describes an atmometer comprising an evaporator having an upper surface exposed to the atmosphere, a liquid water tank provided with a level meter and underlying the evaporator to which it is connected by a suction tube, a measurement sensor of the soil humidity value, and a CPU which controls the flow of water vapor through the evaporator depending on the soil humidity value. An object of the present invention is to provide a device for determining the real evapotranspiration of the vegetated surface of a soil, improved with respect to those described by the prior art. According to the invention, this object is achieved with a device comprising: - a composite porous evaporator, at least a portion of which has a resistance to the flow of water vapor that depends on a parameter, said evaporator having an upper surface exposed to the atmosphere, - a tank of liquid water underlying the evaporator to which it is connected by a suction tube, and provided with a level meter, - a sensor for measuring the soil humidity, and - a central processing unit (CPU) which is configured to control said parameter on which the resistance to the flow of water vapor through the evaporator depends, in dependence on the humidity value of the soil detected by said sensor.
SYSTEM FOR THE DETERMINATION OF THE REAL EVAPOTRANSPIRATION OF A VEGETATED SURFACE
giovanni rallo
Conceptualization
2019-01-01
Abstract
The present invention relates to a device for determining the real evapotranspiration (ETr) of a natural or cultivated vegetated surface. US 2010/212 409 A1 describes an atmometer comprising an evaporator having an upper surface exposed to the atmosphere, a liquid water tank provided with a level meter and underlying the evaporator to which it is connected by a suction tube, a measurement sensor of the soil humidity value, and a CPU which controls the flow of water vapor through the evaporator depending on the soil humidity value. An object of the present invention is to provide a device for determining the real evapotranspiration of the vegetated surface of a soil, improved with respect to those described by the prior art. According to the invention, this object is achieved with a device comprising: - a composite porous evaporator, at least a portion of which has a resistance to the flow of water vapor that depends on a parameter, said evaporator having an upper surface exposed to the atmosphere, - a tank of liquid water underlying the evaporator to which it is connected by a suction tube, and provided with a level meter, - a sensor for measuring the soil humidity, and - a central processing unit (CPU) which is configured to control said parameter on which the resistance to the flow of water vapor through the evaporator depends, in dependence on the humidity value of the soil detected by said sensor.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
