A random cascade disaggregation of spatial rainfall is incorporated into the one-dimensional hydrological component of the UK Meteorological Office Surface Exchange Scheme (MOSES) used in their general circulation model (GCM). The results of several simulations using exponentially distributed, disaggregated and evenly distributed rainfall are compared. The changes in the water balance—in particular the throughfall and the evaporation from the canopy—are assessed. It is shown that a disaggregation using random cascades gives closer values to the reference simulation of canopy evaporation and throughfall variables than the conventional approach.
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Lammering et al. (2000) studied this question.
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