Difference between revisions of "News"

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Bakker, M. (2007). "Simulating groundwater flow to surface water features with leaky beds using analytic elements." Advances in Water Resources 30(3): 399-407.
 
Bakker, M. (2007). "Simulating groundwater flow to surface water features with leaky beds using analytic elements." Advances in Water Resources 30(3): 399-407.
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== Misc ==

Revision as of 12:24, 3 June 2008

AEM and Python Shortcourse, September 22-24, 2008, Bethesda, MD

Hello everybody - We are very excited to be able to offer the course: "Building and Applying Analytical Element Models with Examples and Exercises using Python" 2.5 Day Shortcourse, September 22-24, S.S. Papadopulos & Assoc.Office, Bethesda, Maryland (USA) As you know, analytic element models are often refreshingly easy to understand and very insightful. The best approach to learn the analytic element method is to implement it in a simple computer program. This may sound daunting, but using the easy and powerful Python language, it becomes possible for any hydrogeologist with just a basic understanding of the building blocks of a computer program. In this new course, which is taught by me, you will actually build your own analytic element model, and I expect you will have a great time doing it! For further information on the course, please visit: http://www.sspa.com/Software/analytic.shtml A block of rooms will be arranged at a nearby hotel for course participants – details will be provided on this web page soon. For logistical questions, please contact Matt Tonkin, matt@sspa.com For questions on the course content, please contact me at markbak@gmail.com

We hope to see you in September in Maryland.

Best regards,

Mark Bakker TU Delft, Kiwa WR, and WHPA, Inc.

Visual AEM version 1.0 released March 2008

Dear Visual Bluebird Users,

You are receiving this mail because you have either downloaded the Visual Bluebird groundwater modeling software or have otherwise expressed interest in the release of the newest version of VBB.

Visual Bluebird has been officially superseded by Visual AEM, version 1.0, with extended support for multiple analytical element models, limited transient flow, and multiple layers. Visual AEM can now be accessed via the following web page:

http://www.civil.uwaterloo.ca/jrcraig/VisualAEM/Main.html

Included in this current release:

· Support for multi-layer modeling with the TimML numerical engine · Limited support for transient flow (Theis pumping wells) · Multi-species numerical contaminant transport using analytic (AEM) flow fields · More advanced analytical transport solutions (including parent-daughter decay/biodegradation) · Improved support for basemaps (vector or raster) and digital elevation models (DEMs) · A geological media database for importing common soil types and properties · Element geometric simplification routines · Extended support of contour labeling and visualization, with contour masking · Extended mesh and grid editing capabilities · Improved object manager features · More robust model checking · An updated version of the numerical engine Bluebird/Cardinal (version 3.5) · Many minor revisions, including bug removal

As always, we encourage requests and suggestions! If you have any problems, complaints, or praise for the newest version, feel free to contact the author at jrcraig@uwaterloo.ca

Please feel free to forward this e-mail to other interested parties.

If you would like to be removed from this distribution list, please reply to this message with the heading “UNSUBSCRIBE”

Kind Regards,

James R. Craig, Ph.D. Assistant Professor Department of Civil and Environmental Engineering University of Waterloo jrcraig@uwaterloo.ca http://www.civil.uwaterloo.ca/jrcraig/ (519) 888-4567 x37554


Recent Publications in the AEM Wiki Bib

Mark Bakker, Derivation and relative performance of strings of line elements for modeling (un)confined and semi-confined flow, Advances in Water ResourcesVolume 31, Issue 6, , June 2008, Pages 906-914. (http://www.sciencedirect.com/science/article/B6VCF-4S0PKNG-2/1/f62af25c62ba97b380faa716b51a2e0a)

Abstract:

In the analytic element method, strings of line-sinks may be used to model streams and strings of line-doublets may be used to model impermeable walls or boundaries of inhomogeneities. The resulting solutions are analytic, but the boundary conditions are met approximately. Equations for line elements may be derived in two ways: through integration of point elements (the integral solution) and through application of separation of variables in elliptical coordinates (the elliptical solution). Using both approaches, two sets of line elements are presented for four flow problems: line-sinks and line-doublets in (un)confined flow, and line-sinks and line-doublets in semi-confined flow. Elliptical line elements have the advantage that they do not need a far-field expansion for accurate evaluation far away from the element. The derivation of elliptical line elements is new and applicable to both (un)confined flow and semi-confined flow; only the resulting expressions for elliptical line elements for semi-confined flow have not been found in the current groundwater literature. Existing solutions for elliptical line elements for (un)confined flow were intended for the modeling of isolated features. Four examples are presented, one for each flow problem, to demonstrate that strings of elliptical line elements may be used to obtain accurate solutions; elliptical line-doublets for semi-confined flow can only be strung together in combination with two integral line-doublets. For a zigzag canal in (un)confined flow, a string of elliptical line-sinks performed better than a string of integral line-sinks of the same order when the smallest angle between two adjacent segments is less than 130[degree sign]. Elliptical line-doublets performed better than integral line-doublets for a square inhomogeneity in a uniform, confined flow field; the difference was smaller for an octagonal inhomogeneity. For semi-confined flow, the difference between the integral and elliptical line-sinks was small when modeling a zigzag canal. Keywords: Analytic element method; Line elements; Line-sink; Line-doublet


Steward, D. R., P. Le Grand, et al. (2008). "Analytic formulation of Cauchy integrals for boundaries with curvilinear geometry." Proceedings of the Royal Society a-Mathematical Physical and Engineering Sciences 464(2089): 223-248.

Mesa, E. and E. I. Anderson (2008). "A local model for analysis of pump and treat systems with vertical barrier walls." Advances in Water Resources 31(3): 473-483.

Kraemer, S. R. (2007). "Analytic Element Ground Water Modeling as a Research Program (1980 to 2006)." Ground Water 45(4): 402-408.

Jin, W. and D. R. Steward (2007). "The transition of flow patterns through critical stagnation points in two-dimensional groundwater flow." Advances in Water Resources 30(1): 16-28.

Becker, M. W. and Z. Jiang (2007). "Flux-based contaminant transport in a GIS environment." Journal of Hydrology 343(3-4): 203-210.

Bandilla, K. W., I. Jankovic, et al. (2007). "A new algorithm for analytic element modeling of large-scale groundwater flow." Advances in Water Resources 30(3): 446-454.

Bakker, M., K. Maas, et al. (2007). "Analytic modeling of groundwater dynamics with an approximate impulse response function for areal recharge." Advances in Water Resources 30(3): 493-504.

Bakker, M. (2007). "Simulating groundwater flow to surface water features with leaky beds using analytic elements." Advances in Water Resources 30(3): 399-407.

Misc