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Download 3D-Groundwater Modeling with PMWIN: A Simulation System for by Wen-Hsing Chiang PDF

By Wen-Hsing Chiang

This publication and CD-ROM provide an entire simulation approach for modeling groundwater circulation and shipping techniques. The better half full-version software program (PMWIN) comes with a qualified graphical user-interface, supported types and courses and a number of other beneficial modeling instruments. instruments comprise a Presentation software, a outcome Extractor, a box Interpolator, a box Generator, a Water price range Calculator and a photo Viewer. booklet and CD-ROM are unique at beginner and skilled groundwater modelers.

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Additional resources for 3D-Groundwater Modeling with PMWIN: A Simulation System for Modeling Groundwater Flow and Transport Processes

Example text

If the grid is refined, depending on the nature of the model parameters, they are either kept the same or scaled by the cell size. The following rules apply: 1. 7) and cell-by-cell conductance values of the river, drain, general-head boundary, and stream are scaled by the cell volume. For example, if a well cell is refined to four cells, all four refined cells will be treated as wells, each with 1/4 of the original pumping rate. The sum of their pumping rates remain the same as that of the previous single well.

5. Repeat steps 3 and 4 until the desired polyline is drawn, click on the latest vertex again to complete the polyline or press the right mouse button to abort drawing. To delete a polyline 1. If the display mode is not Grid View or Map View, click the button or the button to switch to the Grid View or Map View. 2. Click the assign value button . 3. Move the mouse pointer over a polyline. The polyline will be highlighted. 4. Press the Delete key. 22 2 Modeling Environment Follow the steps below to assign parameter values to polylines.

Transient: Check the Transient box, if a stress period is transient. Clear the Transient box, if a stress period is steady-state. • Multiplier (Flow): MODFLOW allows the time step to increase as the simulation progresses. It uses the following equations to increase the lengths of time steps as a geometric progression. 4) where P ERLEN is the length of a stress period, T SM U LT is the time step multiplier, N ST P is the number of time steps, and ∆tm is the length of the m-th time step within a stress period.

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