IWRA World Water Congress 2008 Montpellier France
1. Water availability, use and management
Author(s): Ali
Salajegheh
Amir Reza Keshtkar
S.Dalfardi
1- Ph.D. Student,Faculty of
Natural Resources, University of Tehran, Iran, P.O.Box:31585-3314.
2- Assistant Prof., Faculty of Natural
Resources, University of Tehran, Iran, P.O.Box:31585-3314.
Keyword(s): Keywords: Linear moment,
Maximum likelihood, Ordinary moment, Residual sum of squares, Discharge, Frequency distribution function.
Article: PDFAbstractAbstract
In Probability distributions
within hydrology different methods are used for their application. The most current of they have been central moment
and with the using of computers, maximum likelihood method is used, too. The using of L-moment stages in our
country. This research was carried out in order to recognition of suitable probability with pervious common methods.
In order to investigation of suitable probability distribution for maximum annual discharges, by using of L-moment
method through hydrometric stations which exiting in region, were be selected 20 hydrometric stations for maximum
discharges. According to results of this research for annual maximum discharge, P3 distributions and L-moment
method, LP3 distribution and ordinary moment method, LN2 distribution and ordinary moment method, LP3
distribution and L-moment method, P3 distribution and ordinary moment method have been suitable distinguished for
%40, %30, %20, %10 and %5 of stations, respectively. For three distributions (P3, LN2, and LN3) and ordinary
moment method with %23 of stations with P3 and ordinary moment were selected.