| Author | Das, Bitanjaya |
| Call Number | AIT Thesis no. WA-88-4 |
| Subject(s) | Hydraulics--Mathematical models
|
| 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 | A simulation model for the operation of an irrigation canal system
has been developed in this study. The method developed is applied to a
hypothetical canal system consisting of main canal and branch canals.
Vertical under sluice checks are provided to divide the main canal into
reaches and to create higher water surface elevations so as to take out
branch canal offtakes and also to control the flows to the branch canals
and to the downstream of main canal reach. The model is developed to
predict the discharge and depth hydrographs at vital locations in the
system and to determine the final gate openings of in-line as well as
off- line structures so as to allow predetermined discharge to pass through
the check structures. The flow in the canal is considered unsteady and
the complete Saint-Venant equations for unsteady flow in open channel is
solved numerically by the implicit finite difference scheme with the help
of the double sweep method. To start the computations for unsteady flow,
initial condition is provided considering steady gradually varied flow
and the Newton Raphson iterative procedure is adopted for profile
computation. Sensitivity analyses are performed for t he model
performance by varying the parameters both hydraulic and numerical . The
results from the Newton Raphson method compares well with that of the
constant step method. The unsteady flow simulation model is verified with
the results of an analytical method and data from other sources. The
verification confirms the validity of the model and the solution algorithm
incorporated in this study. Lastly, the developed model is applied to a
system with varying discharge condition (i.e discharge cutoff) and a
solution strategy is presented. The programme developed in FORTRAN 77 is
suitable for mainframe as well as for microcomputers. |
| Year | 1988 |
| 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) | Paudyal, Guna N. |
| Examination Committee(s) | Gupta, Ashim Das ;Loof, Rainer
|
| Scholarship Donor(s) | The Royal Government of The Netherlands ; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1988 |