 = 0. Default: 0.1, but 0 if idpr = 0.</p></td>
    </tr>
    <tr>
      <th>z1</th>
      <td><p>Depth below top of aquifer or initial water table to the top of screened 
interval of observation well, in units of length. Use for IOWS = 0 or 1. 
Enter 0 if IOWS = 2. Default: 5.0, but 0 if iows = 2.</p></td>
    </tr>
    <tr>
      <th>z2</th>
      <td><p>Depth below top of aquifer or initial water table to the bottom of 
screened interval of observation well, in units of length. Use for 
IOWS = 0 or 1. En