| Author | Bui Khanh Huong |
| Call Number | AIT Thesis no. CS-88-4 |
| Subject(s) | Hydraulics--Mathematical models
|
| Note | A thesis submitted in partial fulfillment of the requirement for the degree of Master of Science, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | In this thesis a system is developed for daily flow
forecasting consisting o f five regression methods:
- The Least Squares Method,
- The Ridge Regression ,
- The Principal Component Regression,
- The Stepwise Regression, a nd
- The regression with minimum s um of absolute errors.
The system was used to evaluate the performances of the
regression techniques and of the following models:
- The - The
- The
- The
model involving discharge, rainfall and evaporation,
mode l using only discharge and rainfall,
Linear Perturbation Mode l, a nd
Extended Linear Perturbation Model.
From applications to data on two catchment areas , in Laos
and Th ail and , it was found that:
- The performances of the least squares method, the stepwise
regression and the regression with minimum sum of absolute
errors are almost the same. But the regression with
mini mum sum of absolute errors requires mu c h more
executing time.
- The performance of the ridge regression is not as good as
that of the least squares method in the case of
nonsingular matrix . The ridge regression is recommended
for use only when the least squares method cannot give the
results because of the multicollinearity present among the
predictor variables.
- The performance of the principal component regression is
a l so not as good as that of the least squares method.
- The performances of
the model involving discharge, rainfall and evaporation ,
the model using only discharge and rain fall, and
the Extended Linear Perturbation Model
are almost t he same.
- The performance of the model using only discharge and
rainfall is better than that of the Linear Perturbation
Model. |
| Year | 1988 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Computer Science (CS) |
| Chairperson(s) | Huynh Ngoc Phien |
| Examination Committee(s) | Bogardi, Janos J. ;Gonzales, Jr. R. L.
|
| Scholarship Donor(s) |
Japanese Government |
| Degree | Thesis (M.Sc.) - Asian Institute o |