Abstract Estimation of suspended sediment concentra-tion (SSC) is crucial for water quality management,
locating potential sites for fish habitat and reservoir dam
regulations. This study aims at representing frequency
analysis of annual SSC by applying several cumulative
distributions in Sefidroud basin. Three preliminary tests
were used to assess whether the data set comply with the
hypothesis of homogeneity, stationary and randomness of
the investigated time series. Then, frequency analysis of
annual SSC carried out by applying different cumulative
distribution functions. Goodness-of-fit tests indicated that
2-parameter distributions fit to annual SSC time series.
Among the others, LN2, EV1, Logistic, GPAR distribu-tions were the best fit distributions according to the
Goodness-of-fit tests. The greatest values of SSC calcu-lated for Ghareguni and YengiKand stations with quantities
of 111,711.81 and 32,308.23 gr/L for 2 and 833,095.26 and
158,412.37 gr/L for 10 years return period respectively
which should be considered for integrated erosion control
projects
کلید واژگان :
Cumulative distribution function Sefidroud basin Suspended sediment concentration 2-parameter distribution
