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<br />. <br /> <br />. <br /> <br />. <br /> <br />7.3 Long Tenn Simulations <br /> <br />For the long tenn simulations, boundary conditions were set using the GHB <br />(General Head Boundary) module to reproduce Banta's water level in the cell at the <br />appropriate distance from the well as discussed previously (Section 6.0 Radial Row <br />Modeling Methodology). At site 1, response was simuiated for 90 years, 1995 through <br />2085, matching Banta's simulation period. <br /> <br />For each 10 year period, pumping water level in the well at the end of the period <br />was calculated using the Trescott approximation and by the Numerical Radial Flow <br />Model. Results of these analyses for the higher transmissivity value from the aquifer <br />test are presented in Table 7.2 and Figure 7.5. Simulation time is presented in <br />Columns 1 and 2 of Table 7.2 and makes up the horizontal axis of Figure 7.5. Column <br />3 is the SIMGRO discharge from the cell of interest in gallons per minute. Column 4 is <br />the calculated water level in the cell containing this well from the SIMGRO simulation. <br />This water level is plotted in Figure 7.5 as the trace labeled DBM cell (for Denver Basin <br />Model cell), The next four columns present the results of the Trescott approximation. <br />Column 5 tells the number of wells in the cell required to meet the pumping rate, For <br />this cell, the simulations indicate that the desired discharge can be met with a single <br />well, thus discharge per well in column 6 is equal to the total discharge in column 3. <br />Calculated water level in the pumping well using the Trescott approximation is shown in <br />column 6 and in Figure 7,5 as DBM well. Column 8 is the drawdown in the well as <br />measured from the SIMGRO head, <br /> <br />The finalS columns of Table 7.2 contain the results of the Numerical Radial Flow <br />Well Model. Again, we have one well in the cell at all times, and the discharge per well <br />is the same as the SIMGRO discharge. Regional water level in this section of Table <br />7.2 is the water level calculated by the radial flow model at the distance re from the weil. <br />This is presented for comparison to the SIMGRO head, which it should match quite <br />closely. This regional water level is also plotted in Figure 7.5 as the trace labeled MCW <br />region (Multi-Completion Well model regional water level). The 12th column of Table <br /> <br />26 <br />