  Very high water levels of the large rivers are extremely dangerous events
that can lead to large floods and loss of property and thousands and even tens
of thousands human lives. The information from the systematical monitoring of
the water levels allows us to obtain probability distributions for the
extremely high values of the water levels of the rivers of interest. In this
article we study time series containing information from more than 10 years of
satellite observation of the water level of the Huang He river (Yellow river)
in China. We show that the corresponding extreme values distribution is the
Weibull distribution and determine the parameters of the distribution. The
obtained results may help for evaluation of risks associated with floods for
the population and villages in the corresponding region of the Huang He river.
