One of the important objectives of network design is to estimate the probable magnitude of error or
regional hydrological uncertainty arising from network density, distribution and record length.
In entropy method, the hydrological information and regional uncertainty associated with a set of
precipitation station are estimated using Shannon’s entropy concept. Since time series of rainfall
data can be represented by gamma distribution due to the presence of skewness, the entropy term is
derived using single and bivariate gamma distribution.