Quasi-three-dimensional modeling of multi aquifer with reference to ground subsidence | |
| Author | Hossain, Mohammad Zakir |
| Call Number | AIT Thesis no.GT-89-14 |
| Subject(s) | Subsidences (Earth movements) Aquifers |
| 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 |
| Series Statement | Thesis ; no. GT-89-14 |
| Abstract | A quasi-three- dimensional flow model is developed for the analysis of multi aquifer system on the assumptions that each layer ls continuous within the domain and that a permeability difference of 2 orders of magnitude or more exists between the adjoining aquifer and aquitard. In the model each aquifer is simulated by two-dimensional finite element method . Then the adjacent aquifers are connected by vertical imaginary element modeling aquitard through which leakage takes place. The leakage quantity consist of direct flow across the aquitards and yield from aquitard storage (this process is nothing but excess pore pressure dissipation process known in geotechnical engineering). This is taken into account in the form of convolution integral. Model is verified comparing the result with an analytical solution. Model is also applied for the calibration and prediction of Bangkok aquifer system with special attention on recharging. As a previous work (PIYASENA, 1982) didn't consider the aquitard storativlty, a comparison is made between the results of this work and Plyasena's work to compare the behavior of Bangkok aquifer system due to the influence of aquitard storativity. For this purpose, the aquifer-aquitard properties, geometric data, pumping data and also the recharge scheme prepared by the previous study are employed as the input for the present model. Result of the present model shows slower response of piezometric head than that of the previous model, which is considered due to the influence of aquitard stativity. |
| Year | 1990 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GT-89-14 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Geotechnical and Transportation Engineering (GT) |
| Chairperson(s) | Honjo, Yusuke; |
| Examination Committee(s) | Balasubramaniam, A.S. ;Rantucci, Giovanni |
| Scholarship Donor(s) | The Government of Italy I UNDP ; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1990 |