| Author | Vithana, Hemasiri Kamal M. |
| Call Number | AIT Thesis no. CA-81-18 |
| Subject(s) | Droughts--Simulation methods
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | Drought characteristics are studied by using the Theory of Runs to analyze dry and wet period statistics. Three existing models for monthly streamflow generation -viz. THOMAS-FIFRING, SPOLIA-CHANDER and SEN- are considered to evaluate how well they reproduce the drought characteristics of historical data, and they are found to be unsatisfactory. A new model which is based upon the method of fragments in combination with a mixed Markov model is proposed. With the limited experience gained in dealing with several sets of monthly streamflow data, the Proposed Model is found to satisfactorily reproduce not only the drought characteristics but also the mean, standard deviation, skewness coefficient, serial correlation coefficient, deficit and range of monthly streamflow. Several computer programs are developed for all the models considered. They are quite general in the sense that only slight modifications would be required when applied to other cases. More importantly, a computer program for computing the drought - or more generally the run characteristics - is devised. Its correctness is checked using available analytical formulae for simple cases, and it is readily applicable to any sequence. |
| Year | 1981 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Department of Information and Communications Technologies (DICT) |
| Academic Program/FoS | Computer Application (CA) |
| Chairperson(s) | Huynh, Ngoc Phien
|
| Examination Committee(s) | Hosking, Roger J. ; Malik, Ghulam M.
|
| Scholarship Donor(s) | Royal Netherlands Government. |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1981 |