Spectral analysis and modeling of space-time rainfall fields

During the past decade, the scale invariance in space-time rainfall, and the inter-dependence between spatial and temporal scales, have been demonstrated. The concept of dynamic scaling facilitates a description of the joint space-time variability, thus resulting in a more compact mathematical treatment. Accordingly, the space-time dynamics of rainfall fields is investigated and modeled using spectral techniques. A three-dimensional Fractional non-Brownian Motion (Log-normal and Pareto types) generator is used to produce synthetic space-time rainfall fields. Some observed fields, from the GATE I dataset, are analyzed and compared with simulated results.