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| 20 | + </script> |
| 21 | +<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"> |
| 22 | +<title></title> |
| 23 | +<script language="JavaScript" type="text/JavaScript"> |
| 24 | +<!-- |
| 25 | + |
| 26 | +</script> |
| 27 | + |
| 28 | +<div class="row"> |
| 29 | + <strong>DC resistivity sounding curve</strong> |
| 30 | + <br> |
| 31 | + <br> |
| 32 | +</div> |
| 33 | +<div class="row"> |
| 34 | + <div class="col" style="float:left; width:50%" align="left"> |
| 35 | + <div class="row"> |
| 36 | + <input name="direction" value="OFF" onclick="MM_swapImage('dc_soundings','','../../../_images/surv1.gif',1)" checked="checked" type="radio"> |
| 37 | + At small electrode spacings current flows only in near-surface regions. Apparent resistivities look similar to the true resistivity of overburden. |
| 38 | + <br> |
| 39 | + <br> |
| 40 | + </div> |
| 41 | + <div class="row"> |
| 42 | + <input name="direction" value="OFF" onclick="MM_swapImage('dc_soundings','','../../../_images/surv2.gif',1)" checked="checked" type="radio"> |
| 43 | + As current flows deeper, apparent resistivities are influenced by the true resistivities of deeper materials. |
| 44 | + <br> |
| 45 | + <br> |
| 46 | + </div> |
| 47 | + <div class="row"> |
| 48 | + <input name="direction" value="OFF" onclick="MM_swapImage('dc_soundings','','../../../_images/surv3.gif',1)" checked="checked" type="radio"> |
| 49 | + The sounding curve begins to indicate that there are at least 2 layers under this location. |
| 50 | + <br> |
| 51 | + <br> |
| 52 | + </div> |
| 53 | + <div class="row"> |
| 54 | + <input name="direction" value="OFF" onclick="MM_swapImage('dc_soundings','','../../../_images/surv4.gif',1)" checked="checked" type="radio"> |
| 55 | + At very large electrode spacings most of the information reflects deeper ground because that is where most of the current is flowing. |
| 56 | + <br> |
| 57 | + <br> |
| 58 | + </div> |
| 59 | + <div class="row"> |
| 60 | + <input name="direction" value="OFF" onclick="MM_swapImage('dc_soundings','','../../../_images/surv5.gif',1)" checked="checked" type="radio"> |
| 61 | + The completed sounding curve. |
| 62 | + <br> |
| 63 | + <br> |
| 64 | + </div> |
| 65 | + |
| 66 | + </div> |
| 67 | + <div class="col" style="float:right; width:50%" align="center"> |
| 68 | + <img src="../../../_images/surv1.gif" name="dc_soundings" alt="dc_soundings" width="70%"> |
| 69 | + </div> |
| 70 | + |
| 71 | +<div class="row" style="clear: both"></div> |
| 72 | + |
| 73 | + <br> |
| 74 | + <br> |
| 75 | + <br> |
| 76 | +</div> |
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