ABSTRACT
Hydrologic variables depend on many factors associated with the meteorological and hydrologic processes that govern their behavior. The measured values are often treated as random variables, and the probability of occurrence of all random variables is described by the underlying probability distribution, which includes both the parameters and the function. Change in either the meteorological or the hydrologic processes can induce change in the underlying population through either a change in the probability function or the parameters of the function.
