A study of the sensitivity of bare soil evaporation schemes to soil surface wetness, using the coupled soil moisture and surface temperature prediction model, BARESOIL

The performance of evaporation schemes with `` alpha '' and `` beta '' approach and their combination within resistance representation of evaporation from bare soil surface is discussed. For this purpose nine schemes, based on different functions of `` alpha '' or `` beta '', on the ratio of the volumetric soil moisture content and its saturated value are used. The quality of the chosen schemes has been evaluated using the results of time integration by the coupled soil moisture and surface temperature prediction model, BARESOIL, using in situ data. A sensitivity analysis was made using two sets of data derived from the volumetric soil moisture content of the top soil layer. One with values below the wilting point (0.17 m super(3) m super(-) super(3) ) and the second with values above 0.20 m super(3) m super(-) super(3) . Data sets were obtained at the experimental site Rimski Sancevi, Yugoslavia, from the bare surface of a chernozem soil.