A combined deterministic-stochastic model for daily flow forecasting of the Pasak River basin, Thailand | |
| Author | Kabiling, Michael B. |
| Call Number | AIT Thesis no.WA-89-09 |
| Subject(s) | Hydraulics--Mathematical models Flood forecasting--Pasak River Basin |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | This study dealt with the development and application of a deterministic-stochastic model to daily flow forecasting. The study made use of a relatively new approach in hydrological modelling by using stochastic models in modelling the error of deterministic rainfall-runoff models. The Tank model and the NAM model have been used as deterministic rainfall- runoff models. AR models were found to be the most suitable in modelling the discrepancy between the observed discharges and the computed discharges by the deterministic rainfall-runoff mode ls. The stochastic AR models were then combined with the deterministic rainfall-runoff models to form an integrated deterministic-stochastic model. Several combinations of deterministic and stochastic models have been tried in this study to investigate the viability and advantages of each of them in flood forecasting. The combination of the Tank and AR models was found to be suitable for flood forecasting. The integrated deterministic-stochastic models were applied to flood forecasting in three sub-catchments of the Pasak river basin in Thailand. The performance of the integrated deterministic-stochastic models was evaluated and a comparison with purely deterministic and purely stochastic models was made. It was observed that the integrated deterministic- stochastic models had enhanced modelling and fore casting capabilities and were more accurate in flood forecasting than purely deterministic and purely stochastic models. |
| Year | 1989 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Water Resources Research Engineering (WA) |
| Chairperson(s) | Tawatchai Tingsanchali; |
| Examination Committee(s) | Harboe, Ricardo;Huynh, Ngoc Phien;Goto, Akira |
| Scholarship Donor(s) | Government of Japan; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1989 |