| Author | Ahmed, Firoz Montaser |
| Call Number | AIT Thesis no. WA-90-2 |
| Subject(s) | Flood control--Thailand--Songkhla
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | Floods in the southern Thailand are generally caused by heavy rainfalls
which resulted from cyclones or low pressures centers developed in the Gulf of
Thailand. Due to the intense rainfall a nd widespread flooding during the third
week of November 1988, which caused severe loss of life and damage to property
in that area. The city of Hat Yai was also severely affected by the same flood
for two days with the flood -depth of almost 2 meters above the highway due
to the flood water from Khlong U- Thaphao.
Flooding in the Khlong U-Thaphao has been made in this study. A
mathematical model of river networks consisting of unsteady free surface flow
equation is formulated t o compute the flood flow condition a long the river. The
method for solving numerical solutions of governing equations is the finite
difference approximation of implicit scheme. The model is calibrated using the
flood data of November and December 1981 and then verified by using flood
data for the same period of 1984 and 1986 to check the validity of Manning
roughness coefficient " n " . Good agreement between the computed and
observed water levels are obtained. After the calibration and verification, the
model is applied to determine the effectiveness of alternative flood control
scheme in term of change in water level.
For the individual flood control measures investigated, t h e most effective
scheme a long the Khlong U-Thaphao is the bypass channel while the combination
between bypassing and channel dredging is the best combination compared t o
other combinations which gives the most significant reduction of flood level
along Khlong U- Thaphao. |
| Year | 1990 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Water Resources Research Engineering (WA) |
| Chairperson(s) | Suphat Vongvisessomjai |
| Examination Committee(s) | Tawatchai Tingsanchali ;Jensen, Niels Einar |
| Scholarship Donor(s) | Government of Denmark ( DANIDA) |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1990 |