Estimation and identification of long-term meteorological drought pattern play an important role in regional water management and dry land agricultural practices in arid and semiarid climates. In this work, Standardized Precipitation Index (SPI) has been selected as the main criterion for...

Using the model of fractional Brownian motion a method is given for carrying out conditional simulations on a sparse irregularly spaced data set. The method, on an average, maintains not only the fractal co-dimension but also the histogram, mean, variance and spatial correlation of a...