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035 _a.b1008700x
099 9 _aAIT Thesis no. WA-83-4
100 1 _aJivajirajah, Thambirajah
245 1 0 _aApplicability of some statistical distributions in hydrology
260 _aBangkok :
_bAsian Institute of Technology,
_c1982
300 _av, 73 p.
490 1 _aThesis ;
_vno. WA-83-4
500 _aA thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering, school of Engineering and Technology
502 _aThesis (M.Eng.) - Asian Institute of Technology, 1982
520 _aThree statistical distributions namely log Pearson type- 3, Johnson's Sb and transformed gamma distributions-were considered in order to investigate their applicability to hydrology with regards to their flexibility and difficulties in estimating the parameters. Log Pearson type-3 distribution was applied t o annual streamflow, annual rainfall , annual flood peaks and annual maximum rainfall its parameters were estimated using seven different methods. Johnson' s Sb and transformed gamma distributions were applied to annual streamflow and Annual rainfall, since these are bounded on both sides. Two and four methods for parameters estimation were employed to transformed gamma and SB distributions respectively. It was found that the log Pearson type- 3 distribution using method of mixed moments for its parameter estimation is superior for the application in hydrology. However, care should be taken in using the log Pearson type-3 distribution in flood analysis, as it in most of the cases tends to have an upper bound. The transformed gamma distribution was found to be better than the Sb distribution in both annual streamflow and annual rainfall .
650 0 _aHydrology
_xStatistical methods
700 1 _aHuynh Ngoc Phien,
_eChairperson
700 1 _aHoshi, Kiyoshi,
_eExamination Committee
700 0 _aSuphat 'Vongvisessomjai,
_eExamination Committee
710 2 _aRoyal Government of Netherlands,
_eScholarship Donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. WA-83-4
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B21405
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