| Author | Vijeyasivajie, Vairamuttu |
| Call Number | AIT Thesis no.AE-80-18 |
| Subject(s) | Drainage
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | The flow towards 2.5 cm, 5.0 cm and 7.5 cm diameter corrugated plastic drain pipes with and without envelope was
investigated by means of a sand
tank model, under steady state simulated· rainfall condition. Previously developed drainage formulae such as KIRKHAM's Equation and HOOGHOUDT1s
Equations were tested for reliability when no envelope was used. Dimensionless equations were developed to determine the maximum water table height above the level of drain centers with and without an envelope
around pipes. With the envelope the experiment was done in two different ways. First it was with a constant thickness of 11. 4 cm of the envelope. The next was with varying thickness of the envelope but the overall diameter of pipe and envelope being kept constant. From this study the effective diameters of the pipes with envelope were determined. Using the values of effective drain radius for various drain installation, the increase in spacings were computed, This was done in such a way that the new spacing produced a water table height which coincided with the water table when the pipes were without envelope and spaced at a distance of 200 cm. The computations showed that a 11. 4 cm thick envelope
would allow a space increase of some 53%, 44% and 37% as compared with the plain pipe of diameters of 2.5 cm, 5.0 cm and 7.5 cm respectively. In the case of a 5.0 cm diameter pipe with 10.0 cm thick envelope and a 7.5 cm diameter pipe with 8.8 cm thick envelope, the corresponding figures were
39% and 29% respectively. |
| Year | 1980 |
| Type | Thesis |
| School | School of Environment, Resources, and Development |
| Department | Department of Food, Agriculture and Natural Resources (Former title: Department of Food Agriculture, and BioResources (DFAB)) |
| Academic Program/FoS | Agricultural and Food Engineering (AE) |
| Chairperson(s) | Olesen, Svend Elsnab |
| Examination Committee(s) | Apichart Anukularmphai ; Eggers, Helmut |
| Scholarship Donor(s) | The Government of Belgium |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1980 |