| Author | Lanti, Achmad |
| Call Number | AIT Thesis no. WA-83-21 |
| Subject(s) | Floodplains--Mathematical models
|
| 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 | This study presents a development and application of two dimensional flood plain model for unsteady flow . The numerical flow solutions are
obtained by solving the governing equations consisting of the continuity and
momentum equations through the finite difference of implicit scheme . Due to the slow rising of flood in the flood plain, the effect of the inertia terms is negligibly small , therefore it is disregarded. The flood plain is divided into meshes or cells representing storages of river portions and flood plain areas. Flow exchanges between the meshes are considered to be "river link", or "weir link", or "siphon link" by using Manning , weir or energy equations respectively. Furthermore , the model is applied to the flood plain area of the Chao Phraya River in the eastern part of Bangkok having approximately an area of 1,000 km2.
Based only preliminary data on flood plain topography , the model is calibrated using different set of Manning roughness coefficients by comparing t he computed and observed flood marks, at different stations throughout the area , during the flood in October 1980. Reasonable agreement is obtained in the calibration.
Finally , the model is also used to illustrate its applicability to the
following three cases:
1. Effects of control gate operation along the flood plain boundaries, in terms of water level changes in the flood plain .
2. Effects of land subsidence on changes of water depths in that
particular area.
3. Effects of changing data in west and south boundary conditions in terms of water level changes in the flood plain.
|
| Year | 1983 |
| 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) | Tawatchai Tingsanchali |
| Examination Committee(s) | Suphat Vongvisessomjai ; Hoshi, Kiyoshi |
| Scholarship Donor(s) | USAID-ASEAN |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1983 |