Analytic transient multi-layer modeling: no grid or time-stepping needed
Event details
| Date | 04.10.2011 |
| Hour | 16:15 |
| Speaker | Dr Mark Bakker, Department of Civil Engineering and Geosciences Delft University of Technology, NL |
| Location |
GR C0 01
|
| Category | Conferences - Seminars |
A new analytic approach is presented for the transient modeling of groundwater flow in multi-layer systems. As the approach is analytic, no grid or time-stepping is needed. The approach is based on the Laplace-transform analytic element method. A brief overview of the analytic element will be given. The approach is implemented in the free and open-source computer program TTim (available from code.google.com/p/ttim). The current implementation allows for the modeling of wells, streams, and vertical fractures in systems with an arbitrary number of layers. Well screens, streams, and fractures may be open to any number of layers. Features that may be modeled include: delayed response of the water table, wellbore storage, vertical anisotropy, flow through abandoned wells or vertical fractures, and the quick response of heads in observation wells that are screened below the phreatic surface. TTim (pronounce: tee-tim) is written in Python. The input for a simple TTim model consists of only a few lines of Python. For more complicated models, the input may be read from, for example, GIS shape files. TTim has many practical applications, including the design of riverbank filtration systems, analysis of aquifer tests near surface water bodies, design and evaluation of recirculation wells, and modeling of the transient pressure response of proposed carbon geologic sequestration projects. In addition, the short and simple input files and the absence of grids and time stepping make TTim well suited for education.
Links
Practical information
- General public
- Free
Contact
- Prof. D. Andrew Barry, ECOL