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This menu appears in the upper left below the main menu when you are in the plot view. It does not show in the data view because it only pertains to the plot. Plot File Menu These topics allow you to manipulate plot files; these are not the same as input fil...

Anaqsim has been checked in many ways against exact analytic solutions and against numerical models like MODFLOW.  These checks and the input files associated with them are available at https://docs.anaqsim.com/books/checks-of-anaqsim.

Fitts, C. R. (2002), Groundwater Science, Academic Press, San Diego. Fitts, C. R. (2004), Discrete analytic domains: a new AEM formulation for modelinganisotropy and heterogeneity, Proceedings of EPA/NGWA Fractured Rock Conference,Portland Maine, September 20...

General This item has only one line of input.  The first item is checked if the model is steady-state and not checked if the model is transient.  To simulate storage fluxes in transient models, spatially-variable area sinks (SVAS) are required.  If you try to...

The user interface consists of one main menu plus three different tabs: Plot: for graphically displaying map-based inputs and outputs Data: for editing input data.  The data view is automatically displayed when you choose to edit something under the Model ...

Checks confined domain, constant head line boundary, normal flux line boundary, pathlines.  In this single-domain model, the head declines from 30 at x=0 to 10 at x=1000, for a hydraulic gradient of 0.02.  The confined aquifer is 10 units thick and has a isot...

Checks confined domain, constant head line boundary, normal flux line boundary, uniform recharge, 3D pathlines.   This is the same as check1, with the addition of uniform flux into the top of the domain (recharge) at a rate of 0.0005.  Flow over the entire mo...

Checks confined domain, constant head line boundary, normal flux line boundary, uniform leakage from below, 3D pathlines.  This is the same as check 2, but with the leakage coming from below and the pathline starting at the bottom of the aquifer on the left. ...

Checks unconfined domain, constant head line boundary, normal flux line boundary, uniform recharge, 3D pathlines This is the same as check 2, but with an unconfined aquifer instead of a confined one.  The base of the aquifer is at 0.   At the left edge of th...

Checks confined interface domain, constant head line boundary, normal flux line boundary, uniform recharge, 3D pathlines This is the same as check 2, but with a confined interface aquifer instead of a confined one.  The top of of the domain is at –10 and the ...

Checks unconfined interface domain, constant head line boundary, normal flux line boundary, uniform recharge, 3D pathlines This is the same as check 2, but with an unconfined interface aquifer instead of a confined one.  The bottom of the domain is at –100.  ...

Checks unconfined and confined domains, constant head line boundary, normal flux line boundary, spatially-variable area sinks for leakage, 3D pathlines traced across multiple levels This is the same as check 4, but with two model layers: an unconfined aquifer...

Checks confined domains, constant head line boundary, normal flux line boundary, inter-domain boundaries with two levels transitioning to a single level This is like Strack’s example 31.1, with uniform flow in the upper level far-field, and no flow in the low...

Checks confined domains, spatially-variable area sinks for simulating storage changes This is a single confined domain with K = 3, thickness of 10, T = 30, S = 0.001.  One well pumps at a constant discharge.  Initial heads are uniform at 100.   The simulatio...

Checks unconfined domains, spatially-variable area sinks for simulating storage changes and spatially-variable recharge, inter-domain boundary This is an unconfined aquifer that is 6 m of saturated thickness.  The rectangular recharge area starts adding recha...

Checks confined, unconfined domains, transient and steady flow, spatially-variable area sinks for simulating vertical leakage and storage changes, anisotropy, wells, constant head line boundaries, normal flux line boundaries, and inter-domain line boundaries. ...

Checks drain line boundary, interdomain boundary This compares two models with uniform recharge within a circular constant head boundary.  The two models are identical, but one has a drain constructed with a line drain element and in the other, the drain is r...

Checks leaky barrier line boundary, interdomain boundary This compares two models with uniform recharge within a circular constant head boundary.  The two models are identical, but one has a leaky barrier constructed with a leaky barrier line boundary and in ...

Checks confined/unconfined domain, constant head line boundary, normal flux line boundary, uniform recharge, 3D pathlines This is the same as check2, but with a combined confined/unconfined domain.  The domain goes from elevation 0 to 10.  Head at the left is...

Checks confined/unconfined domain, spatially-variable area sinks for vertical leakage, constant head line boundary, normal flux line boundary, uniform recharge, 3D pathlines, minimum saturated thickness where head drops to base of unconfined domain.   This is...