A finite element model of contaminant movement in steady groundwater flow systems | |
| Author | Shrestha, Pushpa Raj Onta |
| Call Number | AIT Thesis no.WA-82-21 |
| Subject(s) | Water, Underground--Pollution Finite element method |
| Note | A thesis submitted in partial fulfilment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | Miscible displacement problems are of great economic importance in a society increasingly confronted by problems of groundwater quality degradation. As a result increasing emphasis in water-resource evaluations has been placed on use of mathematical models that describe the movement and dispersion of contaminants in aquifers. A general mass transport equation for miscible fluids is derived. A numerical model using the Galerkin finite element technique is developed to solve the transient movement of contaminants in a two-dimensional steady groundwater flow system. Validity of the model is tested successfully on problems with known analytical solutions. Various factors affecting the accuracy of the numerical solution are time step, space increment, boundary conditions and the relative magnitudes of dispersion coefficient and groundwater velocity. Hypothetical examples are solved to illustrate the applicability and usefulness of the model under pumpage/recharge conditions. sensitivity analyses performed on some of the input parameters may be useful while applying the model to actual field problems related to groundwater contamination. |
| Year | 1982 |
| 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) | Gupta, Ashim Das |
| Examination Committee(s) | Suphat Vongvisessomjai ; Tawatchai Tingsanchali |
| Scholarship Donor(s) | The Royal Danish Government |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1982 |