Flood frequency analysis for greater-ZAB river

الملخص EN

The analysis of flood discharge for greater Zab river have been conducted using different statistical models such models are, "log–normal type III, Pearson type III, log–Pearson type III and Gumbel distributions".

The models were applied to annual flood series for Greater-Zab River at Eski-Kelek.

The magnitudes of flood computed for different return periods.

The models were compared using statistical measures such as root mean square error, bias, and standard error.

The goodness of fits of all these models was evaluated using the test of Chi-Square.

According to this test the log–normal type III could be regarded as the best for flood series for this river.

It's useful to determine the relationships between the flood magnitudes versus return period.