| Author | Jivajirajah, Thambirajah |
| Call Number | AIT Thesis no. WA-83-4 |
| Subject(s) | Hydrology--Statistical methods
|
| Note | A thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering, school of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | Three 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 . |
| Year | 1982 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Water Resources Research Engineering (WA) |
| Chairperson(s) | Huynh Ngoc Phien |
| Examination Committee(s) | Hoshi, Kiyoshi ; Suphat Vongvisessomjai |
| Scholarship Donor(s) | Royal Government of Netherlands |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1982 |