Integrated modeling of urban drainage and flooding in the central area of Ninh Kieu District, Can Tho City, Vietnam | |
| Author | Lam Van Thinh |
| Call Number | AIT Thesis no.WM-08-22 |
| Subject(s) | Drainage--Vietnam Can Tho--Computer programs Runoff--Vietnam--Can Tho--Computer programs |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Water Engineering and Management |
| Publisher | Asian Institute of Technology |
| Abstract | Increasing of population and expansion of land development by urbanization will reduce infiltration, time of concentration, and cause stress to urban drainage system which consequently increases urban flood. Many studies in urban drainage have been conducted using mathematical models, applied in many countries, but no study has been conducted in Ninh Kieu, Can Tho, Vietnam. By using MOUSE, 1 dimensional hydrologic and hydraulic model, in combination with Mike 21, integrated in Mike Flood, the drainage network and capacity of urban drainage is studied and evaluated. The condition of urban network in the study area could reveal many weaknesses causing the inundation. The field investigation has been conducted in October 2008 for water level, rainfall measurements. The calibration is made successfully with MOUSE model. However, the result of Mike 21 shows underestimate because of insufficient information of elevation and DEM grid-size. The existing network is checked and it can not cope even with 2-year-return-period of rainfall. The causes of flooding in Ninh Kieu are analyzed using model. There are two main causes which are high tide and insufficient drainage capacity. Then, the modification has been made to improve the drainage network by closing all the outlets connected to the river and adding the existing storage. In this case, the effect of tidal which is the main cause of flooding can be reduced. The improvement in discharge capacity is conducted by introducing 5 pumping stations. In addition, re-aligning the pipe slope, increasing pipe diameter, adding new pipes can alleviate the flood significantly. The modified network is tested with 2-year-return-period, and the result shows that only few locations affected by the flood with very small flood depth. Another alternative is done by setting up gates at pumping stations for modified pumps network. It is recognized that, the pumps in modified pumps gates network are operated less energy during low tide comparing to those in modified pumps network. |
| Year | 2009 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Water Engineering and Management (WM) |
| Chairperson(s) | Babel, M. S.;Sutat Weesakul; |
| Examination Committee(s) | Tawatchai Tingsanchali;Vilas Nitivattananon; |
| Scholarship Donor(s) | The Netherlands; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2009 |