0000000000189784
AUTHOR
Nader Katerji
Radiative surface temperature and convective flux calculation over crop canopies
The analysis presented in this paper aims at a better understanding of the potential role of radiative temperature, as measured by a radiometer over crops, in sensible heat flux calculation. Defining radiative temperature as the mean temperature of the surfaces viewed by the radiometer (leaves and soil surface) and assuming that an Ohm's law type formula can be used to express sensible heat flux as a function of the difference between air temperature and radiative temperature, the aerodynamic resistance which divides this temperature difference has been analytically defined. The parameters which appear in the resistance expression depend essentially on wind velocity and canopy structure but…
La formulation de l'evaporation sous forme d'une loi d'Ohm
National audience
A simple modelling of crop water balance for agrometeorological applications
Abstract A simple agrometeorological model of crop water balance is presented. It aims at the best estimate possible of the water balance components with the simplest formulation and the minimum set of input data. The model works with a time step of one day and uses rainfall and the calculated evapotranspiration as the climatic inputs. Some soil and crop characteristics, such as the maximum available moisture and crop coefficients are required as input parameters. The model is tested using experimental data obtained on wheat and lucerne crops in the Paris region. The sensitivity of the model is discussed and some possible applications to rainfed crop management are presented.
Bilan hydrique d'une culture de ble d'hiver pendant la secheresse exceptionnelle de 1976. Importance des remontees capillaires
Les applications de la méthode neutronique en agronomie et en hydrogéologie; National audience
Methods for determining actual evapotranspiration in plots
International audience
Analysis and formulation of heat and water vapour transfer based on a multi-layer model
ISBN 2-7380-0006-1 14 ref.; National audience
Modelacion agrometeorologica del balance hidrico
International audience